diff --git a/bin/facades.php b/bin/facades.php
index 958ccf7126f0..8e0a47b64a18 100644
--- a/bin/facades.php
+++ b/bin/facades.php
@@ -159,7 +159,7 @@ function resolveDocMethods($class)
  *
  * @param  \ReflectionMethodDecorator  $method
  * @param  \ReflectionParameter  $parameter
- * @return string|null
+ * @return ?string
  */
 function resolveDocParamType($method, $parameter)
 {
@@ -187,7 +187,7 @@ function resolveDocParamType($method, $parameter)
  * Resolve the return type from the @return docblock.
  *
  * @param  \ReflectionMethodDecorator  $method
- * @return string|null
+ * @return ?string
  */
 function resolveReturnDocType($method)
 {
@@ -414,7 +414,7 @@ function isKnownOptionalDependency($type)
  * Resolve the declared type.
  *
  * @param  \ReflectionType|null  $type
- * @return string|null
+ * @return ?string
  */
 function resolveType($type)
 {
diff --git a/src/Illuminate/Auth/Access/AuthorizationException.php b/src/Illuminate/Auth/Access/AuthorizationException.php
index 17101b4d07d5..f2e610530b73 100644
--- a/src/Illuminate/Auth/Access/AuthorizationException.php
+++ b/src/Illuminate/Auth/Access/AuthorizationException.php
@@ -24,7 +24,7 @@ class AuthorizationException extends Exception
     /**
      * Create a new authorization exception instance.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  mixed  $code
      * @param  \Throwable|null  $previous
      * @return void
diff --git a/src/Illuminate/Auth/Access/Gate.php b/src/Illuminate/Auth/Access/Gate.php
index 1694607f20e1..9b890fe7ff93 100644
--- a/src/Illuminate/Auth/Access/Gate.php
+++ b/src/Illuminate/Auth/Access/Gate.php
@@ -123,8 +123,8 @@ public function has($ability)
      * Perform an on-demand authorization check. Throw an authorization exception if the condition or callback is false.
      *
      * @param  \Illuminate\Auth\Access\Response|\Closure|bool  $condition
-     * @param  string|null  $message
-     * @param  string|null  $code
+     * @param  ?string  $message
+     * @param  ?string  $code
      * @return \Illuminate\Auth\Access\Response
      *
      * @throws \Illuminate\Auth\Access\AuthorizationException
@@ -138,8 +138,8 @@ public function allowIf($condition, $message = null, $code = null)
      * Perform an on-demand authorization check. Throw an authorization exception if the condition or callback is true.
      *
      * @param  \Illuminate\Auth\Access\Response|\Closure|bool  $condition
-     * @param  string|null  $message
-     * @param  string|null  $code
+     * @param  ?string  $message
+     * @param  ?string  $code
      * @return \Illuminate\Auth\Access\Response
      *
      * @throws \Illuminate\Auth\Access\AuthorizationException
@@ -153,8 +153,8 @@ public function denyIf($condition, $message = null, $code = null)
      * Authorize a given condition or callback.
      *
      * @param  \Illuminate\Auth\Access\Response|\Closure|bool  $condition
-     * @param  string|null  $message
-     * @param  string|null  $code
+     * @param  ?string  $message
+     * @param  ?string  $code
      * @param  bool  $allowWhenResponseIs
      * @return \Illuminate\Auth\Access\Response
      *
@@ -445,7 +445,7 @@ public function raw($ability, $arguments = [])
      *
      * @param  \Illuminate\Contracts\Auth\Authenticatable|null  $user
      * @param  \Closure|string|array  $class
-     * @param  string|null  $method
+     * @param  ?string  $method
      * @return bool
      */
     protected function canBeCalledWithUser($user, $class, $method = null)
diff --git a/src/Illuminate/Auth/Access/HandlesAuthorization.php b/src/Illuminate/Auth/Access/HandlesAuthorization.php
index fc71cf15f1ce..c6dd9c7749d1 100644
--- a/src/Illuminate/Auth/Access/HandlesAuthorization.php
+++ b/src/Illuminate/Auth/Access/HandlesAuthorization.php
@@ -7,7 +7,7 @@ trait HandlesAuthorization
     /**
      * Create a new access response.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  mixed  $code
      * @return \Illuminate\Auth\Access\Response
      */
@@ -19,7 +19,7 @@ protected function allow($message = null, $code = null)
     /**
      * Throws an unauthorized exception.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  mixed|null  $code
      * @return \Illuminate\Auth\Access\Response
      */
diff --git a/src/Illuminate/Auth/Access/Response.php b/src/Illuminate/Auth/Access/Response.php
index 77cabb521de9..499687dbc4b0 100644
--- a/src/Illuminate/Auth/Access/Response.php
+++ b/src/Illuminate/Auth/Access/Response.php
@@ -16,7 +16,7 @@ class Response implements Arrayable
     /**
      * The response message.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $message;
 
@@ -52,7 +52,7 @@ public function __construct($allowed, $message = '', $code = null)
     /**
      * Create a new "allow" Response.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  mixed  $code
      * @return \Illuminate\Auth\Access\Response
      */
@@ -64,7 +64,7 @@ public static function allow($message = null, $code = null)
     /**
      * Create a new "deny" Response.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  mixed  $code
      * @return \Illuminate\Auth\Access\Response
      */
@@ -77,7 +77,7 @@ public static function deny($message = null, $code = null)
      * Create a new "deny" Response with a HTTP status code.
      *
      * @param  int  $status
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  mixed  $code
      * @return \Illuminate\Auth\Access\Response
      */
@@ -89,7 +89,7 @@ public static function denyWithStatus($status, $message = null, $code = null)
     /**
      * Create a new "deny" Response with a 404 HTTP status code.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  mixed  $code
      * @return \Illuminate\Auth\Access\Response
      */
@@ -121,7 +121,7 @@ public function denied()
     /**
      * Get the response message.
      *
-     * @return string|null
+     * @return ?string
      */
     public function message()
     {
diff --git a/src/Illuminate/Auth/AuthManager.php b/src/Illuminate/Auth/AuthManager.php
index e95da5ec4ae4..d2b6ea0acddb 100755
--- a/src/Illuminate/Auth/AuthManager.php
+++ b/src/Illuminate/Auth/AuthManager.php
@@ -60,7 +60,7 @@ public function __construct($app)
     /**
      * Attempt to get the guard from the local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Auth\Guard|\Illuminate\Contracts\Auth\StatefulGuard
      */
     public function guard($name = null)
diff --git a/src/Illuminate/Auth/Authenticatable.php b/src/Illuminate/Auth/Authenticatable.php
index f1c0115916c8..37801febc469 100644
--- a/src/Illuminate/Auth/Authenticatable.php
+++ b/src/Illuminate/Auth/Authenticatable.php
@@ -54,7 +54,7 @@ public function getAuthPassword()
     /**
      * Get the token value for the "remember me" session.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getRememberToken()
     {
diff --git a/src/Illuminate/Auth/AuthenticationException.php b/src/Illuminate/Auth/AuthenticationException.php
index 66808c3b8151..88a69e7c77d2 100644
--- a/src/Illuminate/Auth/AuthenticationException.php
+++ b/src/Illuminate/Auth/AuthenticationException.php
@@ -16,7 +16,7 @@ class AuthenticationException extends Exception
     /**
      * The path the user should be redirected to.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $redirectTo;
 
@@ -25,7 +25,7 @@ class AuthenticationException extends Exception
      *
      * @param  string  $message
      * @param  array  $guards
-     * @param  string|null  $redirectTo
+     * @param  ?string  $redirectTo
      * @return void
      */
     public function __construct($message = 'Unauthenticated.', array $guards = [], $redirectTo = null)
@@ -49,7 +49,7 @@ public function guards()
     /**
      * Get the path the user should be redirected to.
      *
-     * @return string|null
+     * @return ?string
      */
     public function redirectTo()
     {
diff --git a/src/Illuminate/Auth/Console/ClearResetsCommand.php b/src/Illuminate/Auth/Console/ClearResetsCommand.php
index 2ea96681f8e7..8a130f99a466 100644
--- a/src/Illuminate/Auth/Console/ClearResetsCommand.php
+++ b/src/Illuminate/Auth/Console/ClearResetsCommand.php
@@ -20,7 +20,7 @@ class ClearResetsCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Auth/CreatesUserProviders.php b/src/Illuminate/Auth/CreatesUserProviders.php
index 761a427668ee..bca61a1f1dfd 100644
--- a/src/Illuminate/Auth/CreatesUserProviders.php
+++ b/src/Illuminate/Auth/CreatesUserProviders.php
@@ -16,7 +16,7 @@ trait CreatesUserProviders
     /**
      * Create the user provider implementation for the driver.
      *
-     * @param  string|null  $provider
+     * @param  ?string  $provider
      * @return \Illuminate\Contracts\Auth\UserProvider|null
      *
      * @throws \InvalidArgumentException
@@ -45,7 +45,7 @@ public function createUserProvider($provider = null)
     /**
      * Get the user provider configuration.
      *
-     * @param  string|null  $provider
+     * @param  ?string  $provider
      * @return array|null
      */
     protected function getProviderConfiguration($provider)
diff --git a/src/Illuminate/Auth/Middleware/Authenticate.php b/src/Illuminate/Auth/Middleware/Authenticate.php
index 7eda342d3e01..f5dac7c3f773 100644
--- a/src/Illuminate/Auth/Middleware/Authenticate.php
+++ b/src/Illuminate/Auth/Middleware/Authenticate.php
@@ -88,7 +88,7 @@ protected function unauthenticated($request, array $guards)
      * Get the path the user should be redirected to when they are not authenticated.
      *
      * @param  \Illuminate\Http\Request  $request
-     * @return string|null
+     * @return ?string
      */
     protected function redirectTo($request)
     {
diff --git a/src/Illuminate/Auth/Middleware/AuthenticateWithBasicAuth.php b/src/Illuminate/Auth/Middleware/AuthenticateWithBasicAuth.php
index 92c81e68be47..9fde5721f6ef 100644
--- a/src/Illuminate/Auth/Middleware/AuthenticateWithBasicAuth.php
+++ b/src/Illuminate/Auth/Middleware/AuthenticateWithBasicAuth.php
@@ -30,8 +30,8 @@ public function __construct(AuthFactory $auth)
      *
      * @param  \Illuminate\Http\Request  $request
      * @param  \Closure  $next
-     * @param  string|null  $guard
-     * @param  string|null  $field
+     * @param  ?string  $guard
+     * @param  ?string  $field
      * @return mixed
      *
      * @throws \Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException
diff --git a/src/Illuminate/Auth/Middleware/EnsureEmailIsVerified.php b/src/Illuminate/Auth/Middleware/EnsureEmailIsVerified.php
index 8f2b33ae5c72..22292d20daa5 100644
--- a/src/Illuminate/Auth/Middleware/EnsureEmailIsVerified.php
+++ b/src/Illuminate/Auth/Middleware/EnsureEmailIsVerified.php
@@ -14,7 +14,7 @@ class EnsureEmailIsVerified
      *
      * @param  \Illuminate\Http\Request  $request
      * @param  \Closure  $next
-     * @param  string|null  $redirectToRoute
+     * @param  ?string  $redirectToRoute
      * @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse|null
      */
     public function handle($request, Closure $next, $redirectToRoute = null)
diff --git a/src/Illuminate/Auth/Middleware/RequirePassword.php b/src/Illuminate/Auth/Middleware/RequirePassword.php
index 4ed43954da22..5dc402326fc7 100644
--- a/src/Illuminate/Auth/Middleware/RequirePassword.php
+++ b/src/Illuminate/Auth/Middleware/RequirePassword.php
@@ -49,7 +49,7 @@ public function __construct(ResponseFactory $responseFactory, UrlGenerator $urlG
      *
      * @param  \Illuminate\Http\Request  $request
      * @param  \Closure  $next
-     * @param  string|null  $redirectToRoute
+     * @param  ?string  $redirectToRoute
      * @param  int|null  $passwordTimeoutSeconds
      * @return mixed
      */
diff --git a/src/Illuminate/Auth/Passwords/PasswordBrokerManager.php b/src/Illuminate/Auth/Passwords/PasswordBrokerManager.php
index 01cffe8e6c6b..099bc6399aec 100644
--- a/src/Illuminate/Auth/Passwords/PasswordBrokerManager.php
+++ b/src/Illuminate/Auth/Passwords/PasswordBrokerManager.php
@@ -38,7 +38,7 @@ public function __construct($app)
     /**
      * Attempt to get the broker from the local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Auth\PasswordBroker
      */
     public function broker($name = null)
diff --git a/src/Illuminate/Broadcasting/BroadcastManager.php b/src/Illuminate/Broadcasting/BroadcastManager.php
index f479b0bcfc42..ecb6f5897c12 100644
--- a/src/Illuminate/Broadcasting/BroadcastManager.php
+++ b/src/Illuminate/Broadcasting/BroadcastManager.php
@@ -119,7 +119,7 @@ public function channelRoutes(array $attributes = null)
      * Get the socket ID for the given request.
      *
      * @param  \Illuminate\Http\Request|null  $request
-     * @return string|null
+     * @return ?string
      */
     public function socket($request = null)
     {
@@ -201,7 +201,7 @@ protected function mustBeUniqueAndCannotAcquireLock($event)
     /**
      * Get a driver instance.
      *
-     * @param  string|null  $driver
+     * @param  ?string  $driver
      * @return mixed
      */
     public function connection($driver = null)
@@ -212,7 +212,7 @@ public function connection($driver = null)
     /**
      * Get a driver instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return mixed
      */
     public function driver($name = null)
@@ -408,7 +408,7 @@ public function setDefaultDriver($name)
     /**
      * Disconnect the given disk and remove from local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function purge($name = null)
diff --git a/src/Illuminate/Broadcasting/Broadcasters/RedisBroadcaster.php b/src/Illuminate/Broadcasting/Broadcasters/RedisBroadcaster.php
index 5ae2e03c8f44..44bf3a517e4b 100644
--- a/src/Illuminate/Broadcasting/Broadcasters/RedisBroadcaster.php
+++ b/src/Illuminate/Broadcasting/Broadcasters/RedisBroadcaster.php
@@ -38,7 +38,7 @@ class RedisBroadcaster extends Broadcaster
      * Create a new broadcaster instance.
      *
      * @param  \Illuminate\Contracts\Redis\Factory  $redis
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @param  string  $prefix
      * @return void
      */
diff --git a/src/Illuminate/Broadcasting/InteractsWithSockets.php b/src/Illuminate/Broadcasting/InteractsWithSockets.php
index 6be0791a5e06..dc5af0d78045 100644
--- a/src/Illuminate/Broadcasting/InteractsWithSockets.php
+++ b/src/Illuminate/Broadcasting/InteractsWithSockets.php
@@ -9,7 +9,7 @@ trait InteractsWithSockets
     /**
      * The socket ID for the user that raised the event.
      *
-     * @var string|null
+     * @var ?string
      */
     public $socket;
 
diff --git a/src/Illuminate/Broadcasting/PendingBroadcast.php b/src/Illuminate/Broadcasting/PendingBroadcast.php
index 191b905f5938..c15b5920546b 100644
--- a/src/Illuminate/Broadcasting/PendingBroadcast.php
+++ b/src/Illuminate/Broadcasting/PendingBroadcast.php
@@ -36,7 +36,7 @@ public function __construct(Dispatcher $events, $event)
     /**
      * Broadcast the event using a specific broadcaster.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     public function via($connection = null)
diff --git a/src/Illuminate/Bus/PendingBatch.php b/src/Illuminate/Bus/PendingBatch.php
index 6cd518311d21..a7a3237bb8b4 100644
--- a/src/Illuminate/Bus/PendingBatch.php
+++ b/src/Illuminate/Bus/PendingBatch.php
@@ -198,7 +198,7 @@ public function onConnection(string $connection)
     /**
      * Get the connection used by the pending batch.
      *
-     * @return string|null
+     * @return ?string
      */
     public function connection()
     {
@@ -221,7 +221,7 @@ public function onQueue(string $queue)
     /**
      * Get the queue used by the pending batch.
      *
-     * @return string|null
+     * @return ?string
      */
     public function queue()
     {
diff --git a/src/Illuminate/Bus/Queueable.php b/src/Illuminate/Bus/Queueable.php
index 3d3bbb9b290e..045a18af7757 100644
--- a/src/Illuminate/Bus/Queueable.php
+++ b/src/Illuminate/Bus/Queueable.php
@@ -12,28 +12,28 @@ trait Queueable
     /**
      * The name of the connection the job should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $connection;
 
     /**
      * The name of the queue the job should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $queue;
 
     /**
      * The name of the connection the chain should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $chainConnection;
 
     /**
      * The name of the queue the chain should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $chainQueue;
 
@@ -75,7 +75,7 @@ trait Queueable
     /**
      * Set the desired connection for the job.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     public function onConnection($connection)
@@ -88,7 +88,7 @@ public function onConnection($connection)
     /**
      * Set the desired queue for the job.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return $this
      */
     public function onQueue($queue)
@@ -101,7 +101,7 @@ public function onQueue($queue)
     /**
      * Set the desired connection for the chain.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     public function allOnConnection($connection)
@@ -115,7 +115,7 @@ public function allOnConnection($connection)
     /**
      * Set the desired queue for the chain.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return $this
      */
     public function allOnQueue($queue)
diff --git a/src/Illuminate/Cache/ArrayLock.php b/src/Illuminate/Cache/ArrayLock.php
index 4c20783b2362..a0cae5e42014 100644
--- a/src/Illuminate/Cache/ArrayLock.php
+++ b/src/Illuminate/Cache/ArrayLock.php
@@ -19,7 +19,7 @@ class ArrayLock extends Lock
      * @param  \Illuminate\Cache\ArrayStore  $store
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return void
      */
     public function __construct($store, $name, $seconds, $owner = null)
diff --git a/src/Illuminate/Cache/ArrayStore.php b/src/Illuminate/Cache/ArrayStore.php
index 22b42ba5f10f..e5bbec0d99c4 100644
--- a/src/Illuminate/Cache/ArrayStore.php
+++ b/src/Illuminate/Cache/ArrayStore.php
@@ -196,7 +196,7 @@ protected function toTimestamp($seconds)
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null)
diff --git a/src/Illuminate/Cache/CacheLock.php b/src/Illuminate/Cache/CacheLock.php
index 5cc4eeaf4863..28e88dca8318 100644
--- a/src/Illuminate/Cache/CacheLock.php
+++ b/src/Illuminate/Cache/CacheLock.php
@@ -17,7 +17,7 @@ class CacheLock extends Lock
      * @param  \Illuminate\Contracts\Cache\Store  $store
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return void
      */
     public function __construct($store, $name, $seconds, $owner = null)
diff --git a/src/Illuminate/Cache/CacheManager.php b/src/Illuminate/Cache/CacheManager.php
index d945db9678f0..ff9f503e052b 100755
--- a/src/Illuminate/Cache/CacheManager.php
+++ b/src/Illuminate/Cache/CacheManager.php
@@ -51,7 +51,7 @@ public function __construct($app)
     /**
      * Get a cache store instance by name, wrapped in a repository.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Cache\Repository
      */
     public function store($name = null)
@@ -64,7 +64,7 @@ public function store($name = null)
     /**
      * Get a cache driver instance.
      *
-     * @param  string|null  $driver
+     * @param  ?string  $driver
      * @return \Illuminate\Contracts\Cache\Repository
      */
     public function driver($driver = null)
@@ -383,7 +383,7 @@ public function forgetDriver($name = null)
     /**
      * Disconnect the given driver and remove from local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function purge($name = null)
diff --git a/src/Illuminate/Cache/Console/CacheTableCommand.php b/src/Illuminate/Cache/Console/CacheTableCommand.php
index 19b591bdda36..f9e2fa7ec71f 100644
--- a/src/Illuminate/Cache/Console/CacheTableCommand.php
+++ b/src/Illuminate/Cache/Console/CacheTableCommand.php
@@ -22,7 +22,7 @@ class CacheTableCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Cache/Console/ClearCommand.php b/src/Illuminate/Cache/Console/ClearCommand.php
index 7d3336c712a9..bbe2b5c78bbb 100755
--- a/src/Illuminate/Cache/Console/ClearCommand.php
+++ b/src/Illuminate/Cache/Console/ClearCommand.php
@@ -24,7 +24,7 @@ class ClearCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Cache/Console/ForgetCommand.php b/src/Illuminate/Cache/Console/ForgetCommand.php
index c7fc830cd999..075b877c0ca6 100755
--- a/src/Illuminate/Cache/Console/ForgetCommand.php
+++ b/src/Illuminate/Cache/Console/ForgetCommand.php
@@ -21,7 +21,7 @@ class ForgetCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Cache/DatabaseLock.php b/src/Illuminate/Cache/DatabaseLock.php
index c8db07ac4ca3..bde8bcd8216d 100644
--- a/src/Illuminate/Cache/DatabaseLock.php
+++ b/src/Illuminate/Cache/DatabaseLock.php
@@ -36,7 +36,7 @@ class DatabaseLock extends Lock
      * @param  string  $table
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @param  array  $lottery
      * @return void
      */
diff --git a/src/Illuminate/Cache/DatabaseStore.php b/src/Illuminate/Cache/DatabaseStore.php
index b43761b1e39c..df00a25205da 100755
--- a/src/Illuminate/Cache/DatabaseStore.php
+++ b/src/Illuminate/Cache/DatabaseStore.php
@@ -266,7 +266,7 @@ public function forever($key, $value)
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null)
diff --git a/src/Illuminate/Cache/DynamoDbLock.php b/src/Illuminate/Cache/DynamoDbLock.php
index 922260792938..a510f2860322 100644
--- a/src/Illuminate/Cache/DynamoDbLock.php
+++ b/src/Illuminate/Cache/DynamoDbLock.php
@@ -17,7 +17,7 @@ class DynamoDbLock extends Lock
      * @param  \Illuminate\Cache\DynamoDbStore  $dynamo
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return void
      */
     public function __construct(DynamoDbStore $dynamo, $name, $seconds, $owner = null)
diff --git a/src/Illuminate/Cache/DynamoDbStore.php b/src/Illuminate/Cache/DynamoDbStore.php
index 30e175ac0ed0..be29f57702e7 100644
--- a/src/Illuminate/Cache/DynamoDbStore.php
+++ b/src/Illuminate/Cache/DynamoDbStore.php
@@ -399,7 +399,7 @@ public function forever($key, $value)
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null)
diff --git a/src/Illuminate/Cache/HasCacheLock.php b/src/Illuminate/Cache/HasCacheLock.php
index 82ad9c2b31f5..2b701e179f89 100644
--- a/src/Illuminate/Cache/HasCacheLock.php
+++ b/src/Illuminate/Cache/HasCacheLock.php
@@ -9,7 +9,7 @@ trait HasCacheLock
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null)
diff --git a/src/Illuminate/Cache/Lock.php b/src/Illuminate/Cache/Lock.php
index bed170507a9a..744fcf17b10f 100644
--- a/src/Illuminate/Cache/Lock.php
+++ b/src/Illuminate/Cache/Lock.php
@@ -44,7 +44,7 @@ abstract class Lock implements LockContract
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return void
      */
     public function __construct($name, $seconds, $owner = null)
diff --git a/src/Illuminate/Cache/MemcachedConnector.php b/src/Illuminate/Cache/MemcachedConnector.php
index 224d94099bf3..b1635165d093 100755
--- a/src/Illuminate/Cache/MemcachedConnector.php
+++ b/src/Illuminate/Cache/MemcachedConnector.php
@@ -10,7 +10,7 @@ class MemcachedConnector
      * Create a new Memcached connection.
      *
      * @param  array  $servers
-     * @param  string|null  $connectionId
+     * @param  ?string  $connectionId
      * @param  array  $options
      * @param  array  $credentials
      * @return \Memcached
@@ -38,7 +38,7 @@ public function connect(array $servers, $connectionId = null, array $options = [
     /**
      * Get a new Memcached instance.
      *
-     * @param  string|null  $connectionId
+     * @param  ?string  $connectionId
      * @param  array  $credentials
      * @param  array  $options
      * @return \Memcached
@@ -61,7 +61,7 @@ protected function getMemcached($connectionId, array $credentials, array $option
     /**
      * Create the Memcached instance.
      *
-     * @param  string|null  $connectionId
+     * @param  ?string  $connectionId
      * @return \Memcached
      */
     protected function createMemcachedInstance($connectionId)
diff --git a/src/Illuminate/Cache/MemcachedLock.php b/src/Illuminate/Cache/MemcachedLock.php
index 0078a09e6974..71ee5c005676 100644
--- a/src/Illuminate/Cache/MemcachedLock.php
+++ b/src/Illuminate/Cache/MemcachedLock.php
@@ -17,7 +17,7 @@ class MemcachedLock extends Lock
      * @param  \Memcached  $memcached
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return void
      */
     public function __construct($memcached, $name, $seconds, $owner = null)
diff --git a/src/Illuminate/Cache/MemcachedStore.php b/src/Illuminate/Cache/MemcachedStore.php
index 299dab9ad2e4..83a2a6e1d177 100755
--- a/src/Illuminate/Cache/MemcachedStore.php
+++ b/src/Illuminate/Cache/MemcachedStore.php
@@ -183,7 +183,7 @@ public function forever($key, $value)
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null)
diff --git a/src/Illuminate/Cache/NullStore.php b/src/Illuminate/Cache/NullStore.php
index 5694e6c6755b..55666cb813ce 100755
--- a/src/Illuminate/Cache/NullStore.php
+++ b/src/Illuminate/Cache/NullStore.php
@@ -73,7 +73,7 @@ public function forever($key, $value)
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null)
diff --git a/src/Illuminate/Cache/PhpRedisLock.php b/src/Illuminate/Cache/PhpRedisLock.php
index 6cfce7938a37..2d8d6bc7a8d8 100644
--- a/src/Illuminate/Cache/PhpRedisLock.php
+++ b/src/Illuminate/Cache/PhpRedisLock.php
@@ -12,7 +12,7 @@ class PhpRedisLock extends RedisLock
      * @param  \Illuminate\Redis\Connections\PhpRedisConnection  $redis
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return void
      */
     public function __construct(PhpRedisConnection $redis, string $name, int $seconds, ?string $owner = null)
diff --git a/src/Illuminate/Cache/RedisLock.php b/src/Illuminate/Cache/RedisLock.php
index 481b811d398f..3aab616f08c5 100644
--- a/src/Illuminate/Cache/RedisLock.php
+++ b/src/Illuminate/Cache/RedisLock.php
@@ -17,7 +17,7 @@ class RedisLock extends Lock
      * @param  \Illuminate\Redis\Connections\Connection  $redis
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return void
      */
     public function __construct($redis, $name, $seconds, $owner = null)
diff --git a/src/Illuminate/Cache/RedisStore.php b/src/Illuminate/Cache/RedisStore.php
index 4896c9183d03..3e6884a72bef 100755
--- a/src/Illuminate/Cache/RedisStore.php
+++ b/src/Illuminate/Cache/RedisStore.php
@@ -184,7 +184,7 @@ public function forever($key, $value)
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null)
diff --git a/src/Illuminate/Collections/Collection.php b/src/Illuminate/Collections/Collection.php
index 7e77aea77db2..3cd7cc4b5059 100644
--- a/src/Illuminate/Collections/Collection.php
+++ b/src/Illuminate/Collections/Collection.php
@@ -598,7 +598,7 @@ public function hasAny($key)
      * Concatenate values of a given key as a string.
      *
      * @param  callable|string  $value
-     * @param  string|null  $glue
+     * @param  ?string  $glue
      * @return string
      */
     public function implode($value, $glue = null)
@@ -718,7 +718,7 @@ public function last(callable $callback = null, $default = null)
      * Get the values of a given key.
      *
      * @param  string|int|array<array-key, string>  $value
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return static<array-key, mixed>
      */
     public function pluck($value, $key = null)
diff --git a/src/Illuminate/Collections/Enumerable.php b/src/Illuminate/Collections/Enumerable.php
index cbf014139212..c66c597e5ca8 100644
--- a/src/Illuminate/Collections/Enumerable.php
+++ b/src/Illuminate/Collections/Enumerable.php
@@ -379,7 +379,7 @@ public function where($key, $operator = null, $value = null);
     /**
      * Filter items where the value for the given key is null.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return static
      */
     public function whereNull($key = null);
@@ -387,7 +387,7 @@ public function whereNull($key = null);
     /**
      * Filter items where the value for the given key is not null.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return static
      */
     public function whereNotNull($key = null);
@@ -551,7 +551,7 @@ public function hasAny($key);
      * Concatenate values of a given key as a string.
      *
      * @param  string  $value
-     * @param  string|null  $glue
+     * @param  ?string  $glue
      * @return string
      */
     public function implode($value, $glue = null);
@@ -1096,7 +1096,7 @@ public function pipeThrough($pipes);
      * Get the values of a given key.
      *
      * @param  string|array<array-key, string>  $value
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return static<int, mixed>
      */
     public function pluck($value, $key = null);
diff --git a/src/Illuminate/Collections/LazyCollection.php b/src/Illuminate/Collections/LazyCollection.php
index 512c2b77537c..a7036542fd2d 100644
--- a/src/Illuminate/Collections/LazyCollection.php
+++ b/src/Illuminate/Collections/LazyCollection.php
@@ -613,7 +613,7 @@ public function hasAny($key)
      * Concatenate values of a given key as a string.
      *
      * @param  callable|string  $value
-     * @param  string|null  $glue
+     * @param  ?string  $glue
      * @return string
      */
     public function implode($value, $glue = null)
@@ -715,7 +715,7 @@ public function last(callable $callback = null, $default = null)
      * Get the values of a given key.
      *
      * @param  string|array<array-key, string>  $value
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return static<int, mixed>
      */
     public function pluck($value, $key = null)
diff --git a/src/Illuminate/Collections/Traits/EnumeratesValues.php b/src/Illuminate/Collections/Traits/EnumeratesValues.php
index c7803bf84413..8ccd1b1e3c42 100644
--- a/src/Illuminate/Collections/Traits/EnumeratesValues.php
+++ b/src/Illuminate/Collections/Traits/EnumeratesValues.php
@@ -543,7 +543,7 @@ public function where($key, $operator = null, $value = null)
     /**
      * Filter items where the value for the given key is null.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return static
      */
     public function whereNull($key = null)
@@ -554,7 +554,7 @@ public function whereNull($key = null)
     /**
      * Filter items where the value for the given key is not null.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return static
      */
     public function whereNotNull($key = null)
@@ -974,7 +974,7 @@ protected function getArrayableItems($items)
      * Get an operator checker callback.
      *
      * @param  callable|string  $key
-     * @param  string|null  $operator
+     * @param  ?string  $operator
      * @param  mixed  $value
      * @return \Closure
      */
diff --git a/src/Illuminate/Console/CacheCommandMutex.php b/src/Illuminate/Console/CacheCommandMutex.php
index 223174c34010..692f460a7813 100644
--- a/src/Illuminate/Console/CacheCommandMutex.php
+++ b/src/Illuminate/Console/CacheCommandMutex.php
@@ -17,7 +17,7 @@ class CacheCommandMutex implements CommandMutex
     /**
      * The cache store that should be used.
      *
-     * @var string|null
+     * @var ?string
      */
     public $store = null;
 
@@ -86,7 +86,7 @@ protected function commandMutexName($command)
     /**
      * Specify the cache store that should be used.
      *
-     * @param  string|null  $store
+     * @param  ?string  $store
      * @return $this
      */
     public function useStore($store)
diff --git a/src/Illuminate/Console/Command.php b/src/Illuminate/Console/Command.php
index 8b4001cb8f52..8fb2528dbacc 100755
--- a/src/Illuminate/Console/Command.php
+++ b/src/Illuminate/Console/Command.php
@@ -42,7 +42,7 @@ class Command extends SymfonyCommand
     /**
      * The console command description.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $description;
 
diff --git a/src/Illuminate/Console/Concerns/InteractsWithIO.php b/src/Illuminate/Console/Concerns/InteractsWithIO.php
index 13f6197589e2..eb6409a0cef1 100644
--- a/src/Illuminate/Console/Concerns/InteractsWithIO.php
+++ b/src/Illuminate/Console/Concerns/InteractsWithIO.php
@@ -72,7 +72,7 @@ public function hasArgument($name)
     /**
      * Get the value of a command argument.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return array|string|bool|null
      */
     public function argument($key = null)
@@ -108,7 +108,7 @@ public function hasOption($name)
     /**
      * Get the value of a command option.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return string|array|bool|null
      */
     public function option($key = null)
@@ -146,7 +146,7 @@ public function confirm($question, $default = false)
      * Prompt the user for input.
      *
      * @param  string  $question
-     * @param  string|null  $default
+     * @param  ?string  $default
      * @return mixed
      */
     public function ask($question, $default = null)
@@ -159,7 +159,7 @@ public function ask($question, $default = null)
      *
      * @param  string  $question
      * @param  array|callable  $choices
-     * @param  string|null  $default
+     * @param  ?string  $default
      * @return mixed
      */
     public function anticipate($question, $choices, $default = null)
@@ -172,7 +172,7 @@ public function anticipate($question, $choices, $default = null)
      *
      * @param  string  $question
      * @param  array|callable  $choices
-     * @param  string|null  $default
+     * @param  ?string  $default
      * @return mixed
      */
     public function askWithCompletion($question, $choices, $default = null)
@@ -295,7 +295,7 @@ public function info($string, $verbosity = null)
      * Write a string as standard output.
      *
      * @param  string  $string
-     * @param  string|null  $style
+     * @param  ?string  $style
      * @param  int|string|null  $verbosity
      * @return void
      */
diff --git a/src/Illuminate/Console/GeneratorCommand.php b/src/Illuminate/Console/GeneratorCommand.php
index 1beebcbd3db4..b9cbe7870dec 100644
--- a/src/Illuminate/Console/GeneratorCommand.php
+++ b/src/Illuminate/Console/GeneratorCommand.php
@@ -391,7 +391,7 @@ protected function rootNamespace()
     /**
      * Get the model for the default guard's user provider.
      *
-     * @return string|null
+     * @return ?string
      */
     protected function userProviderModel()
     {
diff --git a/src/Illuminate/Console/Scheduling/CacheEventMutex.php b/src/Illuminate/Console/Scheduling/CacheEventMutex.php
index 1f6b15eacbea..b14bbe28583c 100644
--- a/src/Illuminate/Console/Scheduling/CacheEventMutex.php
+++ b/src/Illuminate/Console/Scheduling/CacheEventMutex.php
@@ -16,7 +16,7 @@ class CacheEventMutex implements EventMutex, CacheAware
     /**
      * The cache store that should be used.
      *
-     * @var string|null
+     * @var ?string
      */
     public $store;
 
diff --git a/src/Illuminate/Console/Scheduling/CacheSchedulingMutex.php b/src/Illuminate/Console/Scheduling/CacheSchedulingMutex.php
index ca8e2cb881f7..16320b54febe 100644
--- a/src/Illuminate/Console/Scheduling/CacheSchedulingMutex.php
+++ b/src/Illuminate/Console/Scheduling/CacheSchedulingMutex.php
@@ -17,7 +17,7 @@ class CacheSchedulingMutex implements SchedulingMutex, CacheAware
     /**
      * The cache store that should be used.
      *
-     * @var string|null
+     * @var ?string
      */
     public $store;
 
diff --git a/src/Illuminate/Console/Scheduling/Event.php b/src/Illuminate/Console/Scheduling/Event.php
index 36c180b95a30..bf70b7868c60 100644
--- a/src/Illuminate/Console/Scheduling/Event.php
+++ b/src/Illuminate/Console/Scheduling/Event.php
@@ -26,7 +26,7 @@ class Event
     /**
      * The command string.
      *
-     * @var string|null
+     * @var ?string
      */
     public $command;
 
@@ -47,7 +47,7 @@ class Event
     /**
      * The user the command should run as.
      *
-     * @var string|null
+     * @var ?string
      */
     public $user;
 
@@ -138,7 +138,7 @@ class Event
     /**
      * The human readable description of the event.
      *
-     * @var string|null
+     * @var ?string
      */
     public $description;
 
diff --git a/src/Illuminate/Console/Scheduling/Schedule.php b/src/Illuminate/Console/Scheduling/Schedule.php
index 2f62bf9e81d9..3e60a9e5443c 100644
--- a/src/Illuminate/Console/Scheduling/Schedule.php
+++ b/src/Illuminate/Console/Scheduling/Schedule.php
@@ -141,8 +141,8 @@ public function command($command, array $parameters = [])
      * Add a new job callback event to the schedule.
      *
      * @param  object|string  $job
-     * @param  string|null  $queue
-     * @param  string|null  $connection
+     * @param  ?string  $queue
+     * @param  ?string  $connection
      * @return \Illuminate\Console\Scheduling\CallbackEvent
      */
     public function job($job, $queue = null, $connection = null)
@@ -162,8 +162,8 @@ public function job($job, $queue = null, $connection = null)
      * Dispatch the given job to the queue.
      *
      * @param  object  $job
-     * @param  string|null  $queue
-     * @param  string|null  $connection
+     * @param  ?string  $queue
+     * @param  ?string  $connection
      * @return void
      *
      * @throws \RuntimeException
@@ -193,8 +193,8 @@ protected function dispatchToQueue($job, $queue, $connection)
      * Dispatch the given unique job to the queue.
      *
      * @param  object  $job
-     * @param  string|null  $queue
-     * @param  string|null  $connection
+     * @param  ?string  $queue
+     * @param  ?string  $connection
      * @return void
      *
      * @throws \RuntimeException
diff --git a/src/Illuminate/Console/Scheduling/ScheduleFinishCommand.php b/src/Illuminate/Console/Scheduling/ScheduleFinishCommand.php
index 54943537f312..215f0f6781d4 100644
--- a/src/Illuminate/Console/Scheduling/ScheduleFinishCommand.php
+++ b/src/Illuminate/Console/Scheduling/ScheduleFinishCommand.php
@@ -22,7 +22,7 @@ class ScheduleFinishCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Console/Scheduling/ScheduleListCommand.php b/src/Illuminate/Console/Scheduling/ScheduleListCommand.php
index 9f26f09cef39..3699c03c4d75 100644
--- a/src/Illuminate/Console/Scheduling/ScheduleListCommand.php
+++ b/src/Illuminate/Console/Scheduling/ScheduleListCommand.php
@@ -31,7 +31,7 @@ class ScheduleListCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Console/Scheduling/ScheduleRunCommand.php b/src/Illuminate/Console/Scheduling/ScheduleRunCommand.php
index 067aebd05519..11397a5000c6 100644
--- a/src/Illuminate/Console/Scheduling/ScheduleRunCommand.php
+++ b/src/Illuminate/Console/Scheduling/ScheduleRunCommand.php
@@ -30,7 +30,7 @@ class ScheduleRunCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Console/Scheduling/ScheduleTestCommand.php b/src/Illuminate/Console/Scheduling/ScheduleTestCommand.php
index a8a1a596b77c..d3583013d76f 100644
--- a/src/Illuminate/Console/Scheduling/ScheduleTestCommand.php
+++ b/src/Illuminate/Console/Scheduling/ScheduleTestCommand.php
@@ -21,7 +21,7 @@ class ScheduleTestCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Console/Scheduling/ScheduleWorkCommand.php b/src/Illuminate/Console/Scheduling/ScheduleWorkCommand.php
index de3ce944957b..0b15bc3be9b5 100644
--- a/src/Illuminate/Console/Scheduling/ScheduleWorkCommand.php
+++ b/src/Illuminate/Console/Scheduling/ScheduleWorkCommand.php
@@ -22,7 +22,7 @@ class ScheduleWorkCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Console/View/Components/TwoColumnDetail.php b/src/Illuminate/Console/View/Components/TwoColumnDetail.php
index 1ffa089373ed..d4c593b41e8d 100644
--- a/src/Illuminate/Console/View/Components/TwoColumnDetail.php
+++ b/src/Illuminate/Console/View/Components/TwoColumnDetail.php
@@ -10,7 +10,7 @@ class TwoColumnDetail extends Component
      * Renders the component using the given arguments.
      *
      * @param  string  $first
-     * @param  string|null  $second
+     * @param  ?string  $second
      * @param  int  $verbosity
      * @return void
      */
diff --git a/src/Illuminate/Container/BoundMethod.php b/src/Illuminate/Container/BoundMethod.php
index 0bac7faef108..055069a45a72 100644
--- a/src/Illuminate/Container/BoundMethod.php
+++ b/src/Illuminate/Container/BoundMethod.php
@@ -16,7 +16,7 @@ class BoundMethod
      * @param  \Illuminate\Container\Container  $container
      * @param  callable|string  $callback
      * @param  array  $parameters
-     * @param  string|null  $defaultMethod
+     * @param  ?string  $defaultMethod
      * @return mixed
      *
      * @throws \ReflectionException
@@ -43,7 +43,7 @@ public static function call($container, $callback, array $parameters = [], $defa
      * @param  \Illuminate\Container\Container  $container
      * @param  string  $target
      * @param  array  $parameters
-     * @param  string|null  $defaultMethod
+     * @param  ?string  $defaultMethod
      * @return mixed
      *
      * @throws \InvalidArgumentException
diff --git a/src/Illuminate/Container/Container.php b/src/Illuminate/Container/Container.php
index 280f4d847368..2f85fb985675 100755
--- a/src/Illuminate/Container/Container.php
+++ b/src/Illuminate/Container/Container.php
@@ -641,7 +641,7 @@ public function wrap(Closure $callback, array $parameters = [])
      *
      * @param  callable|string  $callback
      * @param  array<string, mixed>  $parameters
-     * @param  string|null  $defaultMethod
+     * @param  ?string  $defaultMethod
      * @return mixed
      *
      * @throws \InvalidArgumentException
diff --git a/src/Illuminate/Container/Util.php b/src/Illuminate/Container/Util.php
index 8d5023b4a514..17bf7cfea93c 100644
--- a/src/Illuminate/Container/Util.php
+++ b/src/Illuminate/Container/Util.php
@@ -47,7 +47,7 @@ public static function unwrapIfClosure($value, ...$args)
      * From Reflector::getParameterClassName() in Illuminate\Support.
      *
      * @param  \ReflectionParameter  $parameter
-     * @return string|null
+     * @return ?string
      */
     public static function getParameterClassName($parameter)
     {
diff --git a/src/Illuminate/Contracts/Auth/Factory.php b/src/Illuminate/Contracts/Auth/Factory.php
index d76ee76489a4..460857caa5af 100644
--- a/src/Illuminate/Contracts/Auth/Factory.php
+++ b/src/Illuminate/Contracts/Auth/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Get a guard instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Auth\Guard|\Illuminate\Contracts\Auth\StatefulGuard
      */
     public function guard($name = null);
diff --git a/src/Illuminate/Contracts/Auth/PasswordBrokerFactory.php b/src/Illuminate/Contracts/Auth/PasswordBrokerFactory.php
index 683a90308b84..8fbb7c40fc55 100644
--- a/src/Illuminate/Contracts/Auth/PasswordBrokerFactory.php
+++ b/src/Illuminate/Contracts/Auth/PasswordBrokerFactory.php
@@ -7,7 +7,7 @@ interface PasswordBrokerFactory
     /**
      * Get a password broker instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Auth\PasswordBroker
      */
     public function broker($name = null);
diff --git a/src/Illuminate/Contracts/Broadcasting/Factory.php b/src/Illuminate/Contracts/Broadcasting/Factory.php
index 1a4f48f9c228..850d71512875 100644
--- a/src/Illuminate/Contracts/Broadcasting/Factory.php
+++ b/src/Illuminate/Contracts/Broadcasting/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Get a broadcaster implementation by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Broadcasting\Broadcaster
      */
     public function connection($name = null);
diff --git a/src/Illuminate/Contracts/Cache/Factory.php b/src/Illuminate/Contracts/Cache/Factory.php
index 3924662d6cbc..f7e586694843 100644
--- a/src/Illuminate/Contracts/Cache/Factory.php
+++ b/src/Illuminate/Contracts/Cache/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Get a cache store instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Cache\Repository
      */
     public function store($name = null);
diff --git a/src/Illuminate/Contracts/Cache/LockProvider.php b/src/Illuminate/Contracts/Cache/LockProvider.php
index 37d4ef68a5d6..18b64554aa43 100644
--- a/src/Illuminate/Contracts/Cache/LockProvider.php
+++ b/src/Illuminate/Contracts/Cache/LockProvider.php
@@ -9,7 +9,7 @@ interface LockProvider
      *
      * @param  string  $name
      * @param  int  $seconds
-     * @param  string|null  $owner
+     * @param  ?string  $owner
      * @return \Illuminate\Contracts\Cache\Lock
      */
     public function lock($name, $seconds = 0, $owner = null);
diff --git a/src/Illuminate/Contracts/Container/Container.php b/src/Illuminate/Contracts/Container/Container.php
index 7d7f2c96a09f..ce7ac4912140 100644
--- a/src/Illuminate/Contracts/Container/Container.php
+++ b/src/Illuminate/Contracts/Container/Container.php
@@ -168,7 +168,7 @@ public function make($abstract, array $parameters = []);
      *
      * @param  callable|string  $callback
      * @param  array  $parameters
-     * @param  string|null  $defaultMethod
+     * @param  ?string  $defaultMethod
      * @return mixed
      */
     public function call($callback, array $parameters = [], $defaultMethod = null);
diff --git a/src/Illuminate/Contracts/Cookie/Factory.php b/src/Illuminate/Contracts/Cookie/Factory.php
index 6f950219c1c0..a9bcb191679c 100644
--- a/src/Illuminate/Contracts/Cookie/Factory.php
+++ b/src/Illuminate/Contracts/Cookie/Factory.php
@@ -10,12 +10,12 @@ interface Factory
      * @param  string  $name
      * @param  string  $value
      * @param  int  $minutes
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @param  bool|null  $secure
      * @param  bool  $httpOnly
      * @param  bool  $raw
-     * @param  string|null  $sameSite
+     * @param  ?string  $sameSite
      * @return \Symfony\Component\HttpFoundation\Cookie
      */
     public function make($name, $value, $minutes = 0, $path = null, $domain = null, $secure = null, $httpOnly = true, $raw = false, $sameSite = null);
@@ -25,12 +25,12 @@ public function make($name, $value, $minutes = 0, $path = null, $domain = null,
      *
      * @param  string  $name
      * @param  string  $value
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @param  bool|null  $secure
      * @param  bool  $httpOnly
      * @param  bool  $raw
-     * @param  string|null  $sameSite
+     * @param  ?string  $sameSite
      * @return \Symfony\Component\HttpFoundation\Cookie
      */
     public function forever($name, $value, $path = null, $domain = null, $secure = null, $httpOnly = true, $raw = false, $sameSite = null);
@@ -39,8 +39,8 @@ public function forever($name, $value, $path = null, $domain = null, $secure = n
      * Expire the given cookie.
      *
      * @param  string  $name
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @return \Symfony\Component\HttpFoundation\Cookie
      */
     public function forget($name, $path = null, $domain = null);
diff --git a/src/Illuminate/Contracts/Cookie/QueueingFactory.php b/src/Illuminate/Contracts/Cookie/QueueingFactory.php
index d6c74b8f9545..0f47f6d47345 100644
--- a/src/Illuminate/Contracts/Cookie/QueueingFactory.php
+++ b/src/Illuminate/Contracts/Cookie/QueueingFactory.php
@@ -16,7 +16,7 @@ public function queue(...$parameters);
      * Remove a cookie from the queue.
      *
      * @param  string  $name
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @return void
      */
     public function unqueue($name, $path = null);
diff --git a/src/Illuminate/Contracts/Database/Eloquent/SupportsPartialRelations.php b/src/Illuminate/Contracts/Database/Eloquent/SupportsPartialRelations.php
index c82125aa0c10..881a03b6aa73 100644
--- a/src/Illuminate/Contracts/Database/Eloquent/SupportsPartialRelations.php
+++ b/src/Illuminate/Contracts/Database/Eloquent/SupportsPartialRelations.php
@@ -7,7 +7,7 @@ interface SupportsPartialRelations
     /**
      * Indicate that the relation is a single result of a larger one-to-many relationship.
      *
-     * @param  string|null  $column
+     * @param  ?string  $column
      * @param  string|\Closure|null  $aggregate
      * @param  string  $relation
      * @return $this
diff --git a/src/Illuminate/Contracts/Database/ModelIdentifier.php b/src/Illuminate/Contracts/Database/ModelIdentifier.php
index aacd18c079d8..88a7bab1f01a 100644
--- a/src/Illuminate/Contracts/Database/ModelIdentifier.php
+++ b/src/Illuminate/Contracts/Database/ModelIdentifier.php
@@ -30,14 +30,14 @@ class ModelIdentifier
     /**
      * The connection name of the model.
      *
-     * @var string|null
+     * @var ?string
      */
     public $connection;
 
     /**
      * The class name of the model collection.
      *
-     * @var string|null
+     * @var ?string
      */
     public $collectionClass;
 
@@ -61,7 +61,7 @@ public function __construct($class, $id, array $relations, $connection)
     /**
      * Specify the collection class that should be used when serializing / restoring collections.
      *
-     * @param  string|null  $collectionClass
+     * @param  ?string  $collectionClass
      * @return $this
      */
     public function useCollectionClass(?string $collectionClass)
diff --git a/src/Illuminate/Contracts/Filesystem/Factory.php b/src/Illuminate/Contracts/Filesystem/Factory.php
index d0f9cd2bbfae..8591a67390c8 100644
--- a/src/Illuminate/Contracts/Filesystem/Factory.php
+++ b/src/Illuminate/Contracts/Filesystem/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Get a filesystem implementation.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Filesystem\Filesystem
      */
     public function disk($name = null);
diff --git a/src/Illuminate/Contracts/Filesystem/Filesystem.php b/src/Illuminate/Contracts/Filesystem/Filesystem.php
index 6d2fd5787338..6be9ba1cc117 100644
--- a/src/Illuminate/Contracts/Filesystem/Filesystem.php
+++ b/src/Illuminate/Contracts/Filesystem/Filesystem.php
@@ -30,7 +30,7 @@ public function exists($path);
      * Get the contents of a file.
      *
      * @param  string  $path
-     * @return string|null
+     * @return ?string
      */
     public function get($path);
 
@@ -142,7 +142,7 @@ public function lastModified($path);
     /**
      * Get an array of all files in a directory.
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @param  bool  $recursive
      * @return array
      */
@@ -151,7 +151,7 @@ public function files($directory = null, $recursive = false);
     /**
      * Get all of the files from the given directory (recursive).
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @return array
      */
     public function allFiles($directory = null);
@@ -159,7 +159,7 @@ public function allFiles($directory = null);
     /**
      * Get all of the directories within a given directory.
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @param  bool  $recursive
      * @return array
      */
@@ -168,7 +168,7 @@ public function directories($directory = null, $recursive = false);
     /**
      * Get all (recursive) of the directories within a given directory.
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @return array
      */
     public function allDirectories($directory = null);
diff --git a/src/Illuminate/Contracts/Foundation/Application.php b/src/Illuminate/Contracts/Foundation/Application.php
index b46c6de4d847..013236af0b7f 100644
--- a/src/Illuminate/Contracts/Foundation/Application.php
+++ b/src/Illuminate/Contracts/Foundation/Application.php
@@ -117,7 +117,7 @@ public function register($provider, $force = false);
      * Register a deferred provider and service.
      *
      * @param  string  $provider
-     * @param  string|null  $service
+     * @param  ?string  $service
      * @return void
      */
     public function registerDeferredProvider($provider, $service = null);
diff --git a/src/Illuminate/Contracts/Mail/Factory.php b/src/Illuminate/Contracts/Mail/Factory.php
index fe45a2fd9cd8..d0fbb4538455 100644
--- a/src/Illuminate/Contracts/Mail/Factory.php
+++ b/src/Illuminate/Contracts/Mail/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Get a mailer instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Mail\Mailer
      */
     public function mailer($name = null);
diff --git a/src/Illuminate/Contracts/Mail/MailQueue.php b/src/Illuminate/Contracts/Mail/MailQueue.php
index d0d90b88dce0..ef457274004b 100644
--- a/src/Illuminate/Contracts/Mail/MailQueue.php
+++ b/src/Illuminate/Contracts/Mail/MailQueue.php
@@ -8,7 +8,7 @@ interface MailQueue
      * Queue a new e-mail message for sending.
      *
      * @param  \Illuminate\Contracts\Mail\Mailable|string|array  $view
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function queue($view, $queue = null);
@@ -18,7 +18,7 @@ public function queue($view, $queue = null);
      *
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  \Illuminate\Contracts\Mail\Mailable|string|array  $view
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $view, $queue = null);
diff --git a/src/Illuminate/Contracts/Mail/Mailable.php b/src/Illuminate/Contracts/Mail/Mailable.php
index b7fdd42efebd..b356cc04592c 100644
--- a/src/Illuminate/Contracts/Mail/Mailable.php
+++ b/src/Illuminate/Contracts/Mail/Mailable.php
@@ -35,7 +35,7 @@ public function later($delay, Queue $queue);
      * Set the recipients of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return self
      */
     public function cc($address, $name = null);
@@ -44,7 +44,7 @@ public function cc($address, $name = null);
      * Set the recipients of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function bcc($address, $name = null);
@@ -53,7 +53,7 @@ public function bcc($address, $name = null);
      * Set the recipients of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function to($address, $name = null);
diff --git a/src/Illuminate/Contracts/Notifications/Factory.php b/src/Illuminate/Contracts/Notifications/Factory.php
index 77056782c61b..3becce12af79 100644
--- a/src/Illuminate/Contracts/Notifications/Factory.php
+++ b/src/Illuminate/Contracts/Notifications/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Get a channel instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return mixed
      */
     public function channel($name = null);
diff --git a/src/Illuminate/Contracts/Pagination/CursorPaginator.php b/src/Illuminate/Contracts/Pagination/CursorPaginator.php
index 2d62d3a51e78..547851d155d8 100644
--- a/src/Illuminate/Contracts/Pagination/CursorPaginator.php
+++ b/src/Illuminate/Contracts/Pagination/CursorPaginator.php
@@ -16,7 +16,7 @@ public function url($cursor);
      * Add a set of query string values to the paginator.
      *
      * @param  array|string|null  $key
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @return $this
      */
     public function appends($key, $value = null);
@@ -24,7 +24,7 @@ public function appends($key, $value = null);
     /**
      * Get / set the URL fragment to be appended to URLs.
      *
-     * @param  string|null  $fragment
+     * @param  ?string  $fragment
      * @return $this|string|null
      */
     public function fragment($fragment = null);
@@ -32,14 +32,14 @@ public function fragment($fragment = null);
     /**
      * Get the URL for the previous page, or null.
      *
-     * @return string|null
+     * @return ?string
      */
     public function previousPageUrl();
 
     /**
      * The URL for the next page, or null.
      *
-     * @return string|null
+     * @return ?string
      */
     public function nextPageUrl();
 
@@ -88,7 +88,7 @@ public function hasPages();
     /**
      * Get the base path for paginator generated URLs.
      *
-     * @return string|null
+     * @return ?string
      */
     public function path();
 
@@ -109,7 +109,7 @@ public function isNotEmpty();
     /**
      * Render the paginator using a given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return string
      */
diff --git a/src/Illuminate/Contracts/Pagination/Paginator.php b/src/Illuminate/Contracts/Pagination/Paginator.php
index 09292f4a3143..48d6c17f003f 100644
--- a/src/Illuminate/Contracts/Pagination/Paginator.php
+++ b/src/Illuminate/Contracts/Pagination/Paginator.php
@@ -16,7 +16,7 @@ public function url($page);
      * Add a set of query string values to the paginator.
      *
      * @param  array|string|null  $key
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @return $this
      */
     public function appends($key, $value = null);
@@ -24,7 +24,7 @@ public function appends($key, $value = null);
     /**
      * Get / set the URL fragment to be appended to URLs.
      *
-     * @param  string|null  $fragment
+     * @param  ?string  $fragment
      * @return $this|string|null
      */
     public function fragment($fragment = null);
@@ -32,14 +32,14 @@ public function fragment($fragment = null);
     /**
      * The URL for the next page, or null.
      *
-     * @return string|null
+     * @return ?string
      */
     public function nextPageUrl();
 
     /**
      * Get the URL for the previous page, or null.
      *
-     * @return string|null
+     * @return ?string
      */
     public function previousPageUrl();
 
@@ -95,7 +95,7 @@ public function hasMorePages();
     /**
      * Get the base path for paginator generated URLs.
      *
-     * @return string|null
+     * @return ?string
      */
     public function path();
 
@@ -116,7 +116,7 @@ public function isNotEmpty();
     /**
      * Render the paginator using a given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return string
      */
diff --git a/src/Illuminate/Contracts/Pipeline/Hub.php b/src/Illuminate/Contracts/Pipeline/Hub.php
index 1ae675f78a34..339fa6f44af8 100644
--- a/src/Illuminate/Contracts/Pipeline/Hub.php
+++ b/src/Illuminate/Contracts/Pipeline/Hub.php
@@ -8,7 +8,7 @@ interface Hub
      * Send an object through one of the available pipelines.
      *
      * @param  mixed  $object
-     * @param  string|null  $pipeline
+     * @param  ?string  $pipeline
      * @return mixed
      */
     public function pipe($object, $pipeline = null);
diff --git a/src/Illuminate/Contracts/Queue/Factory.php b/src/Illuminate/Contracts/Queue/Factory.php
index 9a0bdeb12577..f7e964e35d7f 100644
--- a/src/Illuminate/Contracts/Queue/Factory.php
+++ b/src/Illuminate/Contracts/Queue/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Resolve a queue connection instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Queue\Queue
      */
     public function connection($name = null);
diff --git a/src/Illuminate/Contracts/Queue/Job.php b/src/Illuminate/Contracts/Queue/Job.php
index 9efd17d14d92..1a5a5d8943e2 100644
--- a/src/Illuminate/Contracts/Queue/Job.php
+++ b/src/Illuminate/Contracts/Queue/Job.php
@@ -7,7 +7,7 @@ interface Job
     /**
      * Get the UUID of the job.
      *
-     * @return string|null
+     * @return ?string
      */
     public function uuid();
 
diff --git a/src/Illuminate/Contracts/Queue/Queue.php b/src/Illuminate/Contracts/Queue/Queue.php
index 1994cddf79eb..6d25ca53d691 100644
--- a/src/Illuminate/Contracts/Queue/Queue.php
+++ b/src/Illuminate/Contracts/Queue/Queue.php
@@ -7,7 +7,7 @@ interface Queue
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null);
@@ -17,7 +17,7 @@ public function size($queue = null);
      *
      * @param  string|object  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function push($job, $data = '', $queue = null);
@@ -36,7 +36,7 @@ public function pushOn($queue, $job, $data = '');
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -48,7 +48,7 @@ public function pushRaw($payload, $queue = null, array $options = []);
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string|object  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $job, $data = '', $queue = null);
@@ -69,7 +69,7 @@ public function laterOn($queue, $delay, $job, $data = '');
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function bulk($jobs, $data = '', $queue = null);
@@ -77,7 +77,7 @@ public function bulk($jobs, $data = '', $queue = null);
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null);
diff --git a/src/Illuminate/Contracts/Queue/QueueableCollection.php b/src/Illuminate/Contracts/Queue/QueueableCollection.php
index 750d10d4b088..2f0d15049050 100644
--- a/src/Illuminate/Contracts/Queue/QueueableCollection.php
+++ b/src/Illuminate/Contracts/Queue/QueueableCollection.php
@@ -7,7 +7,7 @@ interface QueueableCollection
     /**
      * Get the type of the entities being queued.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getQueueableClass();
 
@@ -28,7 +28,7 @@ public function getQueueableRelations();
     /**
      * Get the connection of the entities being queued.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getQueueableConnection();
 }
diff --git a/src/Illuminate/Contracts/Queue/QueueableEntity.php b/src/Illuminate/Contracts/Queue/QueueableEntity.php
index 366f0c84fab6..763f6aa817e5 100644
--- a/src/Illuminate/Contracts/Queue/QueueableEntity.php
+++ b/src/Illuminate/Contracts/Queue/QueueableEntity.php
@@ -21,7 +21,7 @@ public function getQueueableRelations();
     /**
      * Get the connection of the entity.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getQueueableConnection();
 }
diff --git a/src/Illuminate/Contracts/Redis/Factory.php b/src/Illuminate/Contracts/Redis/Factory.php
index c2bfe81f9888..3c77fc94aba7 100644
--- a/src/Illuminate/Contracts/Redis/Factory.php
+++ b/src/Illuminate/Contracts/Redis/Factory.php
@@ -7,7 +7,7 @@ interface Factory
     /**
      * Get a Redis connection by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Redis\Connections\Connection
      */
     public function connection($name = null);
diff --git a/src/Illuminate/Contracts/Routing/ResponseFactory.php b/src/Illuminate/Contracts/Routing/ResponseFactory.php
index a6206a9c4849..b13720e0cbf3 100644
--- a/src/Illuminate/Contracts/Routing/ResponseFactory.php
+++ b/src/Illuminate/Contracts/Routing/ResponseFactory.php
@@ -71,9 +71,9 @@ public function stream($callback, $status = 200, array $headers = []);
      * Create a new streamed response instance as a file download.
      *
      * @param  callable  $callback
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $headers
-     * @param  string|null  $disposition
+     * @param  ?string  $disposition
      * @return \Symfony\Component\HttpFoundation\StreamedResponse
      */
     public function streamDownload($callback, $name = null, array $headers = [], $disposition = 'attachment');
@@ -82,9 +82,9 @@ public function streamDownload($callback, $name = null, array $headers = [], $di
      * Create a new file download response.
      *
      * @param  \SplFileInfo|string  $file
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $headers
-     * @param  string|null  $disposition
+     * @param  ?string  $disposition
      * @return \Symfony\Component\HttpFoundation\BinaryFileResponse
      */
     public function download($file, $name = null, array $headers = [], $disposition = 'attachment');
diff --git a/src/Illuminate/Contracts/Routing/UrlRoutable.php b/src/Illuminate/Contracts/Routing/UrlRoutable.php
index 48c3d723dcc9..67bf137a1e74 100644
--- a/src/Illuminate/Contracts/Routing/UrlRoutable.php
+++ b/src/Illuminate/Contracts/Routing/UrlRoutable.php
@@ -22,7 +22,7 @@ public function getRouteKeyName();
      * Retrieve the model for a bound value.
      *
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Model|null
      */
     public function resolveRouteBinding($value, $field = null);
@@ -32,7 +32,7 @@ public function resolveRouteBinding($value, $field = null);
      *
      * @param  string  $childType
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Model|null
      */
     public function resolveChildRouteBinding($childType, $value, $field);
diff --git a/src/Illuminate/Contracts/Session/Session.php b/src/Illuminate/Contracts/Session/Session.php
index 1bf025a096c8..894265aac3bb 100644
--- a/src/Illuminate/Contracts/Session/Session.php
+++ b/src/Illuminate/Contracts/Session/Session.php
@@ -168,7 +168,7 @@ public function isStarted();
     /**
      * Get the previous URL from the session.
      *
-     * @return string|null
+     * @return ?string
      */
     public function previousUrl();
 
diff --git a/src/Illuminate/Contracts/Support/MessageBag.php b/src/Illuminate/Contracts/Support/MessageBag.php
index 7f708aca533c..f662396d4b5f 100644
--- a/src/Illuminate/Contracts/Support/MessageBag.php
+++ b/src/Illuminate/Contracts/Support/MessageBag.php
@@ -41,8 +41,8 @@ public function has($key);
     /**
      * Get the first message from the bag for a given key.
      *
-     * @param  string|null  $key
-     * @param  string|null  $format
+     * @param  ?string  $key
+     * @param  ?string  $format
      * @return string
      */
     public function first($key = null, $format = null);
@@ -51,7 +51,7 @@ public function first($key = null, $format = null);
      * Get all of the messages from the bag for a given key.
      *
      * @param  string  $key
-     * @param  string|null  $format
+     * @param  ?string  $format
      * @return array
      */
     public function get($key, $format = null);
@@ -59,7 +59,7 @@ public function get($key, $format = null);
     /**
      * Get all of the messages for every key in the bag.
      *
-     * @param  string|null  $format
+     * @param  ?string  $format
      * @return array
      */
     public function all($format = null);
diff --git a/src/Illuminate/Contracts/Translation/HasLocalePreference.php b/src/Illuminate/Contracts/Translation/HasLocalePreference.php
index 1b1f16d6e760..b86731a15d6a 100644
--- a/src/Illuminate/Contracts/Translation/HasLocalePreference.php
+++ b/src/Illuminate/Contracts/Translation/HasLocalePreference.php
@@ -7,7 +7,7 @@ interface HasLocalePreference
     /**
      * Get the preferred locale of the entity.
      *
-     * @return string|null
+     * @return ?string
      */
     public function preferredLocale();
 }
diff --git a/src/Illuminate/Contracts/Translation/Loader.php b/src/Illuminate/Contracts/Translation/Loader.php
index b08418d13665..a5ad12003d39 100755
--- a/src/Illuminate/Contracts/Translation/Loader.php
+++ b/src/Illuminate/Contracts/Translation/Loader.php
@@ -9,7 +9,7 @@ interface Loader
      *
      * @param  string  $locale
      * @param  string  $group
-     * @param  string|null  $namespace
+     * @param  ?string  $namespace
      * @return array
      */
     public function load($locale, $group, $namespace = null);
diff --git a/src/Illuminate/Contracts/Translation/Translator.php b/src/Illuminate/Contracts/Translation/Translator.php
index 6eae4915d5a1..2bf0b6edab57 100644
--- a/src/Illuminate/Contracts/Translation/Translator.php
+++ b/src/Illuminate/Contracts/Translation/Translator.php
@@ -9,7 +9,7 @@ interface Translator
      *
      * @param  string  $key
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return mixed
      */
     public function get($key, array $replace = [], $locale = null);
@@ -20,7 +20,7 @@ public function get($key, array $replace = [], $locale = null);
      * @param  string  $key
      * @param  \Countable|int|array  $number
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return string
      */
     public function choice($key, $number, array $replace = [], $locale = null);
diff --git a/src/Illuminate/Contracts/Validation/Factory.php b/src/Illuminate/Contracts/Validation/Factory.php
index 104675a4dc2f..48af45016fef 100644
--- a/src/Illuminate/Contracts/Validation/Factory.php
+++ b/src/Illuminate/Contracts/Validation/Factory.php
@@ -20,7 +20,7 @@ public function make(array $data, array $rules, array $messages = [], array $cus
      *
      * @param  string  $rule
      * @param  \Closure|string  $extension
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @return void
      */
     public function extend($rule, $extension, $message = null);
@@ -30,7 +30,7 @@ public function extend($rule, $extension, $message = null);
      *
      * @param  string  $rule
      * @param  \Closure|string  $extension
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @return void
      */
     public function extendImplicit($rule, $extension, $message = null);
diff --git a/src/Illuminate/Cookie/CookieJar.php b/src/Illuminate/Cookie/CookieJar.php
index fb93b9d45310..124ea769f091 100755
--- a/src/Illuminate/Cookie/CookieJar.php
+++ b/src/Illuminate/Cookie/CookieJar.php
@@ -22,7 +22,7 @@ class CookieJar implements JarContract
     /**
      * The default domain (if specified).
      *
-     * @var string|null
+     * @var ?string
      */
     protected $domain;
 
@@ -53,12 +53,12 @@ class CookieJar implements JarContract
      * @param  string  $name
      * @param  string  $value
      * @param  int  $minutes
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @param  bool|null  $secure
      * @param  bool  $httpOnly
      * @param  bool  $raw
-     * @param  string|null  $sameSite
+     * @param  ?string  $sameSite
      * @return \Symfony\Component\HttpFoundation\Cookie
      */
     public function make($name, $value, $minutes = 0, $path = null, $domain = null, $secure = null, $httpOnly = true, $raw = false, $sameSite = null)
@@ -75,12 +75,12 @@ public function make($name, $value, $minutes = 0, $path = null, $domain = null,
      *
      * @param  string  $name
      * @param  string  $value
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @param  bool|null  $secure
      * @param  bool  $httpOnly
      * @param  bool  $raw
-     * @param  string|null  $sameSite
+     * @param  ?string  $sameSite
      * @return \Symfony\Component\HttpFoundation\Cookie
      */
     public function forever($name, $value, $path = null, $domain = null, $secure = null, $httpOnly = true, $raw = false, $sameSite = null)
@@ -92,8 +92,8 @@ public function forever($name, $value, $path = null, $domain = null, $secure = n
      * Expire the given cookie.
      *
      * @param  string  $name
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @return \Symfony\Component\HttpFoundation\Cookie
      */
     public function forget($name, $path = null, $domain = null)
@@ -105,7 +105,7 @@ public function forget($name, $path = null, $domain = null)
      * Determine if a cookie has been queued.
      *
      * @param  string  $key
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @return bool
      */
     public function hasQueued($key, $path = null)
@@ -118,7 +118,7 @@ public function hasQueued($key, $path = null)
      *
      * @param  string  $key
      * @param  mixed  $default
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @return \Symfony\Component\HttpFoundation\Cookie|null
      */
     public function queued($key, $default = null, $path = null)
@@ -157,8 +157,8 @@ public function queue(...$parameters)
      * Queue a cookie to expire with the next response.
      *
      * @param  string  $name
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @return void
      */
     public function expire($name, $path = null, $domain = null)
@@ -170,7 +170,7 @@ public function expire($name, $path = null, $domain = null)
      * Remove a cookie from the queue.
      *
      * @param  string  $name
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @return void
      */
     public function unqueue($name, $path = null)
@@ -192,9 +192,9 @@ public function unqueue($name, $path = null)
      * Get the path and domain, or the default values.
      *
      * @param  string  $path
-     * @param  string|null  $domain
+     * @param  ?string  $domain
      * @param  bool|null  $secure
-     * @param  string|null  $sameSite
+     * @param  ?string  $sameSite
      * @return array
      */
     protected function getPathAndDomain($path, $domain, $secure = null, $sameSite = null)
@@ -206,9 +206,9 @@ protected function getPathAndDomain($path, $domain, $secure = null, $sameSite =
      * Set the default path and domain for the jar.
      *
      * @param  string  $path
-     * @param  string|null  $domain
+     * @param  ?string  $domain
      * @param  bool|null  $secure
-     * @param  string|null  $sameSite
+     * @param  ?string  $sameSite
      * @return $this
      */
     public function setDefaultPathAndDomain($path, $domain, $secure = false, $sameSite = null)
diff --git a/src/Illuminate/Cookie/CookieValuePrefix.php b/src/Illuminate/Cookie/CookieValuePrefix.php
index 3f4eb22eb83d..be1b1987e3a7 100644
--- a/src/Illuminate/Cookie/CookieValuePrefix.php
+++ b/src/Illuminate/Cookie/CookieValuePrefix.php
@@ -33,7 +33,7 @@ public static function remove($cookieValue)
      * @param  string  $cookieName
      * @param  string  $cookieValue
      * @param  string  $key
-     * @return string|null
+     * @return ?string
      */
     public static function validate($cookieName, $cookieValue, $key)
     {
diff --git a/src/Illuminate/Database/Capsule/Manager.php b/src/Illuminate/Database/Capsule/Manager.php
index b877e7c6d20d..d0c95ec5cc5f 100755
--- a/src/Illuminate/Database/Capsule/Manager.php
+++ b/src/Illuminate/Database/Capsule/Manager.php
@@ -66,7 +66,7 @@ protected function setupManager()
     /**
      * Get a connection instance from the global manager.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return \Illuminate\Database\Connection
      */
     public static function connection($connection = null)
@@ -78,8 +78,8 @@ public static function connection($connection = null)
      * Get a fluent query builder instance.
      *
      * @param  \Closure|\Illuminate\Database\Query\Builder|string  $table
-     * @param  string|null  $as
-     * @param  string|null  $connection
+     * @param  ?string  $as
+     * @param  ?string  $connection
      * @return \Illuminate\Database\Query\Builder
      */
     public static function table($table, $as = null, $connection = null)
@@ -90,7 +90,7 @@ public static function table($table, $as = null, $connection = null)
     /**
      * Get a schema builder instance.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return \Illuminate\Database\Schema\Builder
      */
     public static function schema($connection = null)
@@ -101,7 +101,7 @@ public static function schema($connection = null)
     /**
      * Get a registered connection instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\Connection
      */
     public function getConnection($name = null)
diff --git a/src/Illuminate/Database/Concerns/BuildsQueries.php b/src/Illuminate/Database/Concerns/BuildsQueries.php
index 16dc024f5510..62799e006697 100644
--- a/src/Illuminate/Database/Concerns/BuildsQueries.php
+++ b/src/Illuminate/Database/Concerns/BuildsQueries.php
@@ -107,8 +107,8 @@ public function each(callable $callback, $count = 1000)
      *
      * @param  int  $count
      * @param  callable  $callback
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return bool
      */
     public function chunkById($count, callable $callback, $column = null, $alias = null)
@@ -161,8 +161,8 @@ public function chunkById($count, callable $callback, $column = null, $alias = n
      *
      * @param  callable  $callback
      * @param  int  $count
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return bool
      */
     public function eachById(callable $callback, $count = 1000, $column = null, $alias = null)
@@ -213,8 +213,8 @@ public function lazy($chunkSize = 1000)
      * Query lazily, by chunking the results of a query by comparing IDs.
      *
      * @param  int  $chunkSize
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return \Illuminate\Support\LazyCollection
      *
      * @throws \InvalidArgumentException
@@ -228,8 +228,8 @@ public function lazyById($chunkSize = 1000, $column = null, $alias = null)
      * Query lazily, by chunking the results of a query by comparing IDs in descending order.
      *
      * @param  int  $chunkSize
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return \Illuminate\Support\LazyCollection
      *
      * @throws \InvalidArgumentException
@@ -243,8 +243,8 @@ public function lazyByIdDesc($chunkSize = 1000, $column = null, $alias = null)
      * Query lazily, by chunking the results of a query by comparing IDs in a given order.
      *
      * @param  int  $chunkSize
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @param  bool  $descending
      * @return \Illuminate\Support\LazyCollection
      *
diff --git a/src/Illuminate/Database/Connection.php b/src/Illuminate/Database/Connection.php
index c4bcb723bf6b..2d0246fac2e9 100755
--- a/src/Illuminate/Database/Connection.php
+++ b/src/Illuminate/Database/Connection.php
@@ -59,7 +59,7 @@ class Connection implements ConnectionInterface
     /**
      * The type of the connection.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $readWriteType;
 
@@ -318,7 +318,7 @@ public function getSchemaBuilder()
      * Begin a fluent query against a database table.
      *
      * @param  \Closure|\Illuminate\Database\Query\Builder|string  $table
-     * @param  string|null  $as
+     * @param  ?string  $as
      * @return \Illuminate\Database\Query\Builder
      */
     public function table($table, $as = null)
@@ -1271,7 +1271,7 @@ public function setReconnector(callable $reconnector)
     /**
      * Get the database connection name.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getName()
     {
@@ -1281,7 +1281,7 @@ public function getName()
     /**
      * Get the database connection full name.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getNameWithReadWriteType()
     {
@@ -1291,7 +1291,7 @@ public function getNameWithReadWriteType()
     /**
      * Get an option from the configuration options.
      *
-     * @param  string|null  $option
+     * @param  ?string  $option
      * @return mixed
      */
     public function getConfig($option = null)
@@ -1520,7 +1520,7 @@ public function setDatabaseName($database)
     /**
      * Set the read / write type of the connection.
      *
-     * @param  string|null  $readWriteType
+     * @param  ?string  $readWriteType
      * @return $this
      */
     public function setReadWriteType($readWriteType)
diff --git a/src/Illuminate/Database/ConnectionInterface.php b/src/Illuminate/Database/ConnectionInterface.php
index 00b23952a3c0..c9bb057dd7f6 100755
--- a/src/Illuminate/Database/ConnectionInterface.php
+++ b/src/Illuminate/Database/ConnectionInterface.php
@@ -10,7 +10,7 @@ interface ConnectionInterface
      * Begin a fluent query against a database table.
      *
      * @param  \Closure|\Illuminate\Database\Query\Builder|string  $table
-     * @param  string|null  $as
+     * @param  ?string  $as
      * @return \Illuminate\Database\Query\Builder
      */
     public function table($table, $as = null);
diff --git a/src/Illuminate/Database/ConnectionResolver.php b/src/Illuminate/Database/ConnectionResolver.php
index dd16ffd65755..0f58a574ea93 100755
--- a/src/Illuminate/Database/ConnectionResolver.php
+++ b/src/Illuminate/Database/ConnectionResolver.php
@@ -34,7 +34,7 @@ public function __construct(array $connections = [])
     /**
      * Get a database connection instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\ConnectionInterface
      */
     public function connection($name = null)
diff --git a/src/Illuminate/Database/ConnectionResolverInterface.php b/src/Illuminate/Database/ConnectionResolverInterface.php
index b31e5a792565..4ebab7ebc705 100755
--- a/src/Illuminate/Database/ConnectionResolverInterface.php
+++ b/src/Illuminate/Database/ConnectionResolverInterface.php
@@ -7,7 +7,7 @@ interface ConnectionResolverInterface
     /**
      * Get a database connection instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\ConnectionInterface
      */
     public function connection($name = null);
diff --git a/src/Illuminate/Database/Connectors/ConnectionFactory.php b/src/Illuminate/Database/Connectors/ConnectionFactory.php
index 80b25d0223a6..e1101e9f633b 100755
--- a/src/Illuminate/Database/Connectors/ConnectionFactory.php
+++ b/src/Illuminate/Database/Connectors/ConnectionFactory.php
@@ -36,7 +36,7 @@ public function __construct(Container $container)
      * Establish a PDO connection based on the configuration.
      *
      * @param  array  $config
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\Connection
      */
     public function make(array $config, $name = null)
diff --git a/src/Illuminate/Database/Console/DumpCommand.php b/src/Illuminate/Database/Console/DumpCommand.php
index 50a6ad076454..b003a6cf958e 100644
--- a/src/Illuminate/Database/Console/DumpCommand.php
+++ b/src/Illuminate/Database/Console/DumpCommand.php
@@ -29,7 +29,7 @@ class DumpCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Database/Console/Factories/FactoryMakeCommand.php b/src/Illuminate/Database/Console/Factories/FactoryMakeCommand.php
index 48c43759d9f8..c255579aa3f1 100644
--- a/src/Illuminate/Database/Console/Factories/FactoryMakeCommand.php
+++ b/src/Illuminate/Database/Console/Factories/FactoryMakeCommand.php
@@ -22,7 +22,7 @@ class FactoryMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Database/Console/MonitorCommand.php b/src/Illuminate/Database/Console/MonitorCommand.php
index 5d0f3edcbdb2..350f95b3c265 100644
--- a/src/Illuminate/Database/Console/MonitorCommand.php
+++ b/src/Illuminate/Database/Console/MonitorCommand.php
@@ -25,7 +25,7 @@ class MonitorCommand extends DatabaseInspectionCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Database/Console/Seeds/SeedCommand.php b/src/Illuminate/Database/Console/Seeds/SeedCommand.php
index 235958648925..1a77ce9cc927 100644
--- a/src/Illuminate/Database/Console/Seeds/SeedCommand.php
+++ b/src/Illuminate/Database/Console/Seeds/SeedCommand.php
@@ -27,7 +27,7 @@ class SeedCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Database/Console/Seeds/SeederMakeCommand.php b/src/Illuminate/Database/Console/Seeds/SeederMakeCommand.php
index 8ba01cb012f3..8b139c60d1ba 100644
--- a/src/Illuminate/Database/Console/Seeds/SeederMakeCommand.php
+++ b/src/Illuminate/Database/Console/Seeds/SeederMakeCommand.php
@@ -21,7 +21,7 @@ class SeederMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Database/Console/WipeCommand.php b/src/Illuminate/Database/Console/WipeCommand.php
index cb269229f9d5..bafaf8312496 100644
--- a/src/Illuminate/Database/Console/WipeCommand.php
+++ b/src/Illuminate/Database/Console/WipeCommand.php
@@ -24,7 +24,7 @@ class WipeCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Database/DatabaseManager.php b/src/Illuminate/Database/DatabaseManager.php
index 4f990711914a..fc53aa3bc924 100755
--- a/src/Illuminate/Database/DatabaseManager.php
+++ b/src/Illuminate/Database/DatabaseManager.php
@@ -83,7 +83,7 @@ public function __construct($app, ConnectionFactory $factory)
     /**
      * Get a database connection instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\Connection
      */
     public function connection($name = null)
@@ -206,7 +206,7 @@ protected function configure(Connection $connection, $type)
      * Prepare the read / write mode for database connection instance.
      *
      * @param  \Illuminate\Database\Connection  $connection
-     * @param  string|null  $type
+     * @param  ?string  $type
      * @return \Illuminate\Database\Connection
      */
     protected function setPdoForType(Connection $connection, $type = null)
@@ -266,7 +266,7 @@ public function registerDoctrineType(string $class, string $name, string $type):
     /**
      * Disconnect from the given database and remove from local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function purge($name = null)
@@ -281,7 +281,7 @@ public function purge($name = null)
     /**
      * Disconnect from the given database.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function disconnect($name = null)
@@ -294,7 +294,7 @@ public function disconnect($name = null)
     /**
      * Reconnect to the given database.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\Connection
      */
     public function reconnect($name = null)
diff --git a/src/Illuminate/Database/Eloquent/BroadcastsEvents.php b/src/Illuminate/Database/Eloquent/BroadcastsEvents.php
index 79dc02d8aea7..47389758955a 100644
--- a/src/Illuminate/Database/Eloquent/BroadcastsEvents.php
+++ b/src/Illuminate/Database/Eloquent/BroadcastsEvents.php
@@ -168,7 +168,7 @@ public function broadcastOn($event)
     /**
      * Get the queue connection that should be used to broadcast model events.
      *
-     * @return string|null
+     * @return ?string
      */
     public function broadcastConnection()
     {
@@ -178,7 +178,7 @@ public function broadcastConnection()
     /**
      * Get the queue that should be used to broadcast model events.
      *
-     * @return string|null
+     * @return ?string
      */
     public function broadcastQueue()
     {
diff --git a/src/Illuminate/Database/Eloquent/Builder.php b/src/Illuminate/Database/Eloquent/Builder.php
index 90a0d4947afd..8236a074b59a 100755
--- a/src/Illuminate/Database/Eloquent/Builder.php
+++ b/src/Illuminate/Database/Eloquent/Builder.php
@@ -852,7 +852,7 @@ protected function enforceOrderBy()
      * Get an array with the values of a given column.
      *
      * @param  string|\Illuminate\Database\Query\Expression  $column
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return \Illuminate\Support\Collection
      */
     public function pluck($column, $key = null)
@@ -1043,7 +1043,7 @@ public function upsert(array $values, $uniqueBy, $update = null)
     /**
      * Update the column's update timestamp.
      *
-     * @param  string|null  $column
+     * @param  ?string  $column
      * @return int|false
      */
     public function touch($column = null)
diff --git a/src/Illuminate/Database/Eloquent/Collection.php b/src/Illuminate/Database/Eloquent/Collection.php
index c512c8ba05c7..3547464fb795 100755
--- a/src/Illuminate/Database/Eloquent/Collection.php
+++ b/src/Illuminate/Database/Eloquent/Collection.php
@@ -75,7 +75,7 @@ public function load($relations)
      *
      * @param  array<array-key, (callable(\Illuminate\Database\Eloquent\Builder): mixed)|string>|string  $relations
      * @param  string  $column
-     * @param  string|null  $function
+     * @param  ?string  $function
      * @return $this
      */
     public function loadAggregate($relations, $column, $function = null)
@@ -651,7 +651,7 @@ public function pad($size, $value)
      * Get an array with the values of a given key.
      *
      * @param  string|array<array-key, string>  $value
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return \Illuminate\Support\Collection<array-key, mixed>
      */
     public function pluck($value, $key = null)
@@ -688,7 +688,7 @@ protected function duplicateComparator($strict)
     /**
      * Get the type of the entities being queued.
      *
-     * @return string|null
+     * @return ?string
      *
      * @throws \LogicException
      */
@@ -763,7 +763,7 @@ public function getQueueableRelations()
     /**
      * Get the connection of the entities being queued.
      *
-     * @return string|null
+     * @return ?string
      *
      * @throws \LogicException
      */
diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
index 2b1b7ca2998d..a970974c129e 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
@@ -1409,7 +1409,7 @@ protected function isStandardDateFormat($value)
      * Convert a DateTime to a storable string.
      *
      * @param  mixed  $value
-     * @return string|null
+     * @return ?string
      */
     public function fromDateTime($value)
     {
@@ -1804,7 +1804,7 @@ public function setRawAttributes(array $attributes, $sync = false)
     /**
      * Get the model's original attribute values.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed|array
      */
@@ -1818,7 +1818,7 @@ public function getOriginal($key = null, $default = null)
     /**
      * Get the model's original attribute values.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed|array
      */
@@ -1838,7 +1838,7 @@ protected function getOriginalWithoutRewindingModel($key = null, $default = null
     /**
      * Get the model's raw original attribute values.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed|array
      */
diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasRelationships.php b/src/Illuminate/Database/Eloquent/Concerns/HasRelationships.php
index 25b6d1af4dd0..7eeb225315c5 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasRelationships.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasRelationships.php
@@ -93,8 +93,8 @@ public static function resolveRelationUsing($name, Closure $callback)
      * Define a one-to-one relationship.
      *
      * @param  string  $related
-     * @param  string|null  $foreignKey
-     * @param  string|null  $localKey
+     * @param  ?string  $foreignKey
+     * @param  ?string  $localKey
      * @return \Illuminate\Database\Eloquent\Relations\HasOne
      */
     public function hasOne($related, $foreignKey = null, $localKey = null)
@@ -127,10 +127,10 @@ protected function newHasOne(Builder $query, Model $parent, $foreignKey, $localK
      *
      * @param  string  $related
      * @param  string  $through
-     * @param  string|null  $firstKey
-     * @param  string|null  $secondKey
-     * @param  string|null  $localKey
-     * @param  string|null  $secondLocalKey
+     * @param  ?string  $firstKey
+     * @param  ?string  $secondKey
+     * @param  ?string  $localKey
+     * @param  ?string  $secondLocalKey
      * @return \Illuminate\Database\Eloquent\Relations\HasOneThrough
      */
     public function hasOneThrough($related, $through, $firstKey = null, $secondKey = null, $localKey = null, $secondLocalKey = null)
@@ -170,9 +170,9 @@ protected function newHasOneThrough(Builder $query, Model $farParent, Model $thr
      *
      * @param  string  $related
      * @param  string  $name
-     * @param  string|null  $type
-     * @param  string|null  $id
-     * @param  string|null  $localKey
+     * @param  ?string  $type
+     * @param  ?string  $id
+     * @param  ?string  $localKey
      * @return \Illuminate\Database\Eloquent\Relations\MorphOne
      */
     public function morphOne($related, $name, $type = null, $id = null, $localKey = null)
@@ -207,9 +207,9 @@ protected function newMorphOne(Builder $query, Model $parent, $type, $id, $local
      * Define an inverse one-to-one or many relationship.
      *
      * @param  string  $related
-     * @param  string|null  $foreignKey
-     * @param  string|null  $ownerKey
-     * @param  string|null  $relation
+     * @param  ?string  $foreignKey
+     * @param  ?string  $ownerKey
+     * @param  ?string  $relation
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function belongsTo($related, $foreignKey = null, $ownerKey = null, $relation = null)
@@ -258,10 +258,10 @@ protected function newBelongsTo(Builder $query, Model $child, $foreignKey, $owne
     /**
      * Define a polymorphic, inverse one-to-one or many relationship.
      *
-     * @param  string|null  $name
-     * @param  string|null  $type
-     * @param  string|null  $id
-     * @param  string|null  $ownerKey
+     * @param  ?string  $name
+     * @param  ?string  $type
+     * @param  ?string  $id
+     * @param  ?string  $ownerKey
      * @return \Illuminate\Database\Eloquent\Relations\MorphTo
      */
     public function morphTo($name = null, $type = null, $id = null, $ownerKey = null)
@@ -363,8 +363,8 @@ protected function guessBelongsToRelation()
      * Define a one-to-many relationship.
      *
      * @param  string  $related
-     * @param  string|null  $foreignKey
-     * @param  string|null  $localKey
+     * @param  ?string  $foreignKey
+     * @param  ?string  $localKey
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
      */
     public function hasMany($related, $foreignKey = null, $localKey = null)
@@ -399,10 +399,10 @@ protected function newHasMany(Builder $query, Model $parent, $foreignKey, $local
      *
      * @param  string  $related
      * @param  string  $through
-     * @param  string|null  $firstKey
-     * @param  string|null  $secondKey
-     * @param  string|null  $localKey
-     * @param  string|null  $secondLocalKey
+     * @param  ?string  $firstKey
+     * @param  ?string  $secondKey
+     * @param  ?string  $localKey
+     * @param  ?string  $secondLocalKey
      * @return \Illuminate\Database\Eloquent\Relations\HasManyThrough
      */
     public function hasManyThrough($related, $through, $firstKey = null, $secondKey = null, $localKey = null, $secondLocalKey = null)
@@ -446,9 +446,9 @@ protected function newHasManyThrough(Builder $query, Model $farParent, Model $th
      *
      * @param  string  $related
      * @param  string  $name
-     * @param  string|null  $type
-     * @param  string|null  $id
-     * @param  string|null  $localKey
+     * @param  ?string  $type
+     * @param  ?string  $id
+     * @param  ?string  $localKey
      * @return \Illuminate\Database\Eloquent\Relations\MorphMany
      */
     public function morphMany($related, $name, $type = null, $id = null, $localKey = null)
@@ -486,12 +486,12 @@ protected function newMorphMany(Builder $query, Model $parent, $type, $id, $loca
      * Define a many-to-many relationship.
      *
      * @param  string  $related
-     * @param  string|null  $table
-     * @param  string|null  $foreignPivotKey
-     * @param  string|null  $relatedPivotKey
-     * @param  string|null  $parentKey
-     * @param  string|null  $relatedKey
-     * @param  string|null  $relation
+     * @param  ?string  $table
+     * @param  ?string  $foreignPivotKey
+     * @param  ?string  $relatedPivotKey
+     * @param  ?string  $parentKey
+     * @param  ?string  $relatedKey
+     * @param  ?string  $relation
      * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
      */
     public function belongsToMany($related, $table = null, $foreignPivotKey = null, $relatedPivotKey = null,
@@ -537,7 +537,7 @@ public function belongsToMany($related, $table = null, $foreignPivotKey = null,
      * @param  string  $relatedPivotKey
      * @param  string  $parentKey
      * @param  string  $relatedKey
-     * @param  string|null  $relationName
+     * @param  ?string  $relationName
      * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
      */
     protected function newBelongsToMany(Builder $query, Model $parent, $table, $foreignPivotKey, $relatedPivotKey,
@@ -551,11 +551,11 @@ protected function newBelongsToMany(Builder $query, Model $parent, $table, $fore
      *
      * @param  string  $related
      * @param  string  $name
-     * @param  string|null  $table
-     * @param  string|null  $foreignPivotKey
-     * @param  string|null  $relatedPivotKey
-     * @param  string|null  $parentKey
-     * @param  string|null  $relatedKey
+     * @param  ?string  $table
+     * @param  ?string  $foreignPivotKey
+     * @param  ?string  $relatedPivotKey
+     * @param  ?string  $parentKey
+     * @param  ?string  $relatedKey
      * @param  bool  $inverse
      * @return \Illuminate\Database\Eloquent\Relations\MorphToMany
      */
@@ -603,7 +603,7 @@ public function morphToMany($related, $name, $table = null, $foreignPivotKey = n
      * @param  string  $relatedPivotKey
      * @param  string  $parentKey
      * @param  string  $relatedKey
-     * @param  string|null  $relationName
+     * @param  ?string  $relationName
      * @param  bool  $inverse
      * @return \Illuminate\Database\Eloquent\Relations\MorphToMany
      */
@@ -620,11 +620,11 @@ protected function newMorphToMany(Builder $query, Model $parent, $name, $table,
      *
      * @param  string  $related
      * @param  string  $name
-     * @param  string|null  $table
-     * @param  string|null  $foreignPivotKey
-     * @param  string|null  $relatedPivotKey
-     * @param  string|null  $parentKey
-     * @param  string|null  $relatedKey
+     * @param  ?string  $table
+     * @param  ?string  $foreignPivotKey
+     * @param  ?string  $relatedPivotKey
+     * @param  ?string  $parentKey
+     * @param  ?string  $relatedKey
      * @return \Illuminate\Database\Eloquent\Relations\MorphToMany
      */
     public function morphedByMany($related, $name, $table = null, $foreignPivotKey = null,
@@ -646,7 +646,7 @@ public function morphedByMany($related, $name, $table = null, $foreignPivotKey =
     /**
      * Get the relationship name of the belongsToMany relationship.
      *
-     * @return string|null
+     * @return ?string
      */
     protected function guessBelongsToManyRelation()
     {
diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasTimestamps.php b/src/Illuminate/Database/Eloquent/Concerns/HasTimestamps.php
index 2b6dfab6548e..31f258847a5a 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasTimestamps.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasTimestamps.php
@@ -23,7 +23,7 @@ trait HasTimestamps
     /**
      * Update the model's update timestamp.
      *
-     * @param  string|null  $attribute
+     * @param  ?string  $attribute
      * @return bool
      */
     public function touch($attribute = null)
@@ -46,7 +46,7 @@ public function touch($attribute = null)
     /**
      * Update the model's update timestamp without raising any events.
      *
-     * @param  string|null  $attribute
+     * @param  ?string  $attribute
      * @return bool
      */
     public function touchQuietly($attribute = null)
@@ -137,7 +137,7 @@ public function usesTimestamps()
     /**
      * Get the name of the "created at" column.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getCreatedAtColumn()
     {
@@ -147,7 +147,7 @@ public function getCreatedAtColumn()
     /**
      * Get the name of the "updated at" column.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getUpdatedAtColumn()
     {
@@ -157,7 +157,7 @@ public function getUpdatedAtColumn()
     /**
      * Get the fully qualified "created at" column.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getQualifiedCreatedAtColumn()
     {
@@ -167,7 +167,7 @@ public function getQualifiedCreatedAtColumn()
     /**
      * Get the fully qualified "updated at" column.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getQualifiedUpdatedAtColumn()
     {
@@ -206,7 +206,7 @@ public static function withoutTimestampsOn($models, $callback)
     /**
      * Determine if the given model is ignoring timestamps / touches.
      *
-     * @param  string|null  $class
+     * @param  ?string  $class
      * @return bool
      */
     public static function isIgnoringTimestamps($class = null)
diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasUlids.php b/src/Illuminate/Database/Eloquent/Concerns/HasUlids.php
index b944c5d6b7b1..bd551343b67a 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasUlids.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasUlids.php
@@ -38,7 +38,7 @@ public function newUniqueId()
      *
      * @param  \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Relations\Relation  $query
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Relations\Relation
      *
      * @throws \Illuminate\Database\Eloquent\ModelNotFoundException
diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasUuids.php b/src/Illuminate/Database/Eloquent/Concerns/HasUuids.php
index 96a08b66c44d..1645524355a5 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasUuids.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasUuids.php
@@ -48,7 +48,7 @@ public function uniqueIds()
      *
      * @param  \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Relations\Relation  $query
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Relations\Relation
      *
      * @throws \Illuminate\Database\Eloquent\ModelNotFoundException
diff --git a/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php b/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
index 6f64884e4388..9df3d7a1c756 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
@@ -530,7 +530,7 @@ public function orWhereNotMorphedTo($relation, $model)
      * Add a "belongs to" relationship where clause to the query.
      *
      * @param  \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Collection<\Illuminate\Database\Eloquent\Model>  $related
-     * @param  string|null  $relationshipName
+     * @param  ?string  $relationshipName
      * @param  string  $boolean
      * @return $this
      *
@@ -577,7 +577,7 @@ public function whereBelongsTo($related, $relationshipName = null, $boolean = 'a
      * Add an "BelongsTo" relationship with an "or where" clause to the query.
      *
      * @param  \Illuminate\Database\Eloquent\Model  $related
-     * @param  string|null  $relationshipName
+     * @param  ?string  $relationshipName
      * @return $this
      *
      * @throws \RuntimeException
diff --git a/src/Illuminate/Database/Eloquent/Factories/BelongsToRelationship.php b/src/Illuminate/Database/Eloquent/Factories/BelongsToRelationship.php
index b2fb1b251a31..0b796d7f342b 100644
--- a/src/Illuminate/Database/Eloquent/Factories/BelongsToRelationship.php
+++ b/src/Illuminate/Database/Eloquent/Factories/BelongsToRelationship.php
@@ -62,7 +62,7 @@ public function attributesFor(Model $model)
     /**
      * Get the deferred resolver for this relationship's parent ID.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return \Closure
      */
     protected function resolver($key)
diff --git a/src/Illuminate/Database/Eloquent/Factories/Factory.php b/src/Illuminate/Database/Eloquent/Factories/Factory.php
index 7cec54cabe2e..068d82fa97af 100644
--- a/src/Illuminate/Database/Eloquent/Factories/Factory.php
+++ b/src/Illuminate/Database/Eloquent/Factories/Factory.php
@@ -88,7 +88,7 @@ abstract class Factory
     /**
      * The name of the database connection that will be used to create the models.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $connection;
 
@@ -129,7 +129,7 @@ abstract class Factory
      * @param  \Illuminate\Support\Collection|null  $for
      * @param  \Illuminate\Support\Collection|null  $afterMaking
      * @param  \Illuminate\Support\Collection|null  $afterCreating
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @param  \Illuminate\Support\Collection|null  $recycle
      * @return void
      */
@@ -559,7 +559,7 @@ public function crossJoinSequence(...$sequence)
      * Define a child relationship for the model.
      *
      * @param  \Illuminate\Database\Eloquent\Factories\Factory  $factory
-     * @param  string|null  $relationship
+     * @param  ?string  $relationship
      * @return static
      */
     public function has(self $factory, $relationship = null)
@@ -589,7 +589,7 @@ protected function guessRelationship(string $related)
      *
      * @param  \Illuminate\Database\Eloquent\Factories\Factory|\Illuminate\Support\Collection|\Illuminate\Database\Eloquent\Model|array  $factory
      * @param  (callable(): array<string, mixed>)|array<string, mixed>  $pivot
-     * @param  string|null  $relationship
+     * @param  ?string  $relationship
      * @return static
      */
     public function hasAttached($factory, $pivot = [], $relationship = null)
@@ -611,7 +611,7 @@ public function hasAttached($factory, $pivot = [], $relationship = null)
      * Define a parent relationship for the model.
      *
      * @param  \Illuminate\Database\Eloquent\Factories\Factory|\Illuminate\Database\Eloquent\Model  $factory
-     * @param  string|null  $relationship
+     * @param  ?string  $relationship
      * @return static
      */
     public function for($factory, $relationship = null)
diff --git a/src/Illuminate/Database/Eloquent/Model.php b/src/Illuminate/Database/Eloquent/Model.php
index 6b1e8b6e280d..a1ab7e9400c9 100644
--- a/src/Illuminate/Database/Eloquent/Model.php
+++ b/src/Illuminate/Database/Eloquent/Model.php
@@ -37,7 +37,7 @@ abstract class Model implements Arrayable, ArrayAccess, CanBeEscapedWhenCastToSt
     /**
      * The connection name for the model.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $connection;
 
@@ -212,14 +212,14 @@ abstract class Model implements Arrayable, ArrayAccess, CanBeEscapedWhenCastToSt
     /**
      * The name of the "created at" column.
      *
-     * @var string|null
+     * @var ?string
      */
     const CREATED_AT = 'created_at';
 
     /**
      * The name of the "updated at" column.
      *
-     * @var string|null
+     * @var ?string
      */
     const UPDATED_AT = 'updated_at';
 
@@ -378,7 +378,7 @@ public static function withoutTouchingOn(array $models, callable $callback)
     /**
      * Determine if the given model is ignoring touches.
      *
-     * @param  string|null  $class
+     * @param  ?string  $class
      * @return bool
      */
     public static function isIgnoringTouch($class = null)
@@ -618,7 +618,7 @@ public function newInstance($attributes = [], $exists = false)
      * Create a new model instance that is existing.
      *
      * @param  array  $attributes
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return static
      */
     public function newFromBuilder($attributes = [], $connection = null)
@@ -637,7 +637,7 @@ public function newFromBuilder($attributes = [], $connection = null)
     /**
      * Begin querying the model on a given connection.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return \Illuminate\Database\Eloquent\Builder
      */
     public static function on($connection = null)
@@ -1581,7 +1581,7 @@ public function newCollection(array $models = [])
      * @param  array  $attributes
      * @param  string  $table
      * @param  bool  $exists
-     * @param  string|null  $using
+     * @param  ?string  $using
      * @return \Illuminate\Database\Eloquent\Relations\Pivot
      */
     public function newPivot(self $parent, array $attributes, $table, $exists, $using = null)
@@ -1774,7 +1774,7 @@ public function getConnection()
     /**
      * Get the current connection name for the model.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getConnectionName()
     {
@@ -1784,7 +1784,7 @@ public function getConnectionName()
     /**
      * Set the connection associated with the model.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function setConnection($name)
@@ -1797,7 +1797,7 @@ public function setConnection($name)
     /**
      * Resolve a connection instance.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return \Illuminate\Database\Connection
      */
     public static function resolveConnection($connection = null)
@@ -1993,7 +1993,7 @@ public function getQueueableRelations()
     /**
      * Get the queueable connection for the entity.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getQueueableConnection()
     {
@@ -2024,7 +2024,7 @@ public function getRouteKeyName()
      * Retrieve the model for a bound value.
      *
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Model|null
      */
     public function resolveRouteBinding($value, $field = null)
@@ -2036,7 +2036,7 @@ public function resolveRouteBinding($value, $field = null)
      * Retrieve the model for a bound value.
      *
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Model|null
      */
     public function resolveSoftDeletableRouteBinding($value, $field = null)
@@ -2049,7 +2049,7 @@ public function resolveSoftDeletableRouteBinding($value, $field = null)
      *
      * @param  string  $childType
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Model|null
      */
     public function resolveChildRouteBinding($childType, $value, $field)
@@ -2062,7 +2062,7 @@ public function resolveChildRouteBinding($childType, $value, $field)
      *
      * @param  string  $childType
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Model|null
      */
     public function resolveSoftDeletableChildRouteBinding($childType, $value, $field)
@@ -2075,7 +2075,7 @@ public function resolveSoftDeletableChildRouteBinding($childType, $value, $field
      *
      * @param  string  $childType
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Relations\Relation
      */
     protected function resolveChildRouteBindingQuery($childType, $value, $field)
@@ -2110,7 +2110,7 @@ protected function childRouteBindingRelationshipName($childType)
      *
      * @param  \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Relations\Relation  $query
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return \Illuminate\Database\Eloquent\Relations\Relation
      */
     public function resolveRouteBindingQuery($query, $value, $field = null)
diff --git a/src/Illuminate/Database/Eloquent/RelationNotFoundException.php b/src/Illuminate/Database/Eloquent/RelationNotFoundException.php
index 73257bb101e0..3d16f0870f06 100755
--- a/src/Illuminate/Database/Eloquent/RelationNotFoundException.php
+++ b/src/Illuminate/Database/Eloquent/RelationNotFoundException.php
@@ -25,7 +25,7 @@ class RelationNotFoundException extends RuntimeException
      *
      * @param  object  $model
      * @param  string  $relation
-     * @param  string|null  $type
+     * @param  ?string  $type
      * @return static
      */
     public static function make($model, $relation, $type = null)
diff --git a/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php b/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
index 622415787c56..db929e841444 100755
--- a/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
+++ b/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
@@ -140,7 +140,7 @@ class BelongsToMany extends Relation
      * @param  string  $relatedPivotKey
      * @param  string  $parentKey
      * @param  string  $relatedKey
-     * @param  string|null  $relationName
+     * @param  ?string  $relationName
      * @return void
      */
     public function __construct(Builder $query, Model $parent, $table, $foreignPivotKey,
@@ -932,7 +932,7 @@ public function simplePaginate($perPage = null, $columns = ['*'], $pageName = 'p
      * @param  int|null  $perPage
      * @param  array  $columns
      * @param  string  $cursorName
-     * @param  string|null  $cursor
+     * @param  ?string  $cursor
      * @return \Illuminate\Contracts\Pagination\CursorPaginator
      */
     public function cursorPaginate($perPage = null, $columns = ['*'], $cursorName = 'cursor', $cursor = null)
@@ -965,8 +965,8 @@ public function chunk($count, callable $callback)
      *
      * @param  int  $count
      * @param  callable  $callback
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return bool
      */
     public function chunkById($count, callable $callback, $column = null, $alias = null)
@@ -1023,8 +1023,8 @@ public function lazy($chunkSize = 1000)
      * Query lazily, by chunking the results of a query by comparing IDs.
      *
      * @param  int  $chunkSize
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return \Illuminate\Support\LazyCollection
      */
     public function lazyById($chunkSize = 1000, $column = null, $alias = null)
diff --git a/src/Illuminate/Database/Eloquent/Relations/Concerns/CanBeOneOfMany.php b/src/Illuminate/Database/Eloquent/Relations/Concerns/CanBeOneOfMany.php
index 25b9a5834bad..6716287d5857 100644
--- a/src/Illuminate/Database/Eloquent/Relations/Concerns/CanBeOneOfMany.php
+++ b/src/Illuminate/Database/Eloquent/Relations/Concerns/CanBeOneOfMany.php
@@ -35,8 +35,8 @@ trait CanBeOneOfMany
      * Add constraints for inner join subselect for one of many relationships.
      *
      * @param  \Illuminate\Database\Eloquent\Builder  $query
-     * @param  string|null  $column
-     * @param  string|null  $aggregate
+     * @param  ?string  $column
+     * @param  ?string  $aggregate
      * @return void
      */
     abstract public function addOneOfManySubQueryConstraints(Builder $query, $column = null, $aggregate = null);
@@ -61,7 +61,7 @@ abstract public function addOneOfManyJoinSubQueryConstraints(JoinClause $join);
      *
      * @param  string|array|null  $column
      * @param  string|\Closure|null  $aggregate
-     * @param  string|null  $relation
+     * @param  ?string  $relation
      * @return $this
      *
      * @throws \InvalidArgumentException
@@ -136,7 +136,7 @@ public function ofMany($column = 'id', $aggregate = 'MAX', $relation = null)
      * Indicate that the relation is the latest single result of a larger one-to-many relationship.
      *
      * @param  string|array|null  $column
-     * @param  string|null  $relation
+     * @param  ?string  $relation
      * @return $this
      */
     public function latestOfMany($column = 'id', $relation = null)
@@ -150,7 +150,7 @@ public function latestOfMany($column = 'id', $relation = null)
      * Indicate that the relation is the oldest single result of a larger one-to-many relationship.
      *
      * @param  string|array|null  $column
-     * @param  string|null  $relation
+     * @param  ?string  $relation
      * @return $this
      */
     public function oldestOfMany($column = 'id', $relation = null)
@@ -177,8 +177,8 @@ protected function getDefaultOneOfManyJoinAlias($relation)
      * Get a new query for the related model, grouping the query by the given column, often the foreign key of the relationship.
      *
      * @param  string|array  $groupBy
-     * @param  string|null  $column
-     * @param  string|null  $aggregate
+     * @param  ?string  $column
+     * @param  ?string  $aggregate
      * @return \Illuminate\Database\Eloquent\Builder
      */
     protected function newOneOfManySubQuery($groupBy, $column = null, $aggregate = null)
diff --git a/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php b/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
index b6ca9083f3e9..0e446a4fe3cc 100644
--- a/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
+++ b/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
@@ -491,7 +491,7 @@ public function simplePaginate($perPage = null, $columns = ['*'], $pageName = 'p
      * @param  int|null  $perPage
      * @param  array  $columns
      * @param  string  $cursorName
-     * @param  string|null  $cursor
+     * @param  ?string  $cursor
      * @return \Illuminate\Contracts\Pagination\CursorPaginator
      */
     public function cursorPaginate($perPage = null, $columns = ['*'], $cursorName = 'cursor', $cursor = null)
@@ -533,8 +533,8 @@ public function chunk($count, callable $callback)
      *
      * @param  int  $count
      * @param  callable  $callback
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return bool
      */
     public function chunkById($count, callable $callback, $column = null, $alias = null)
@@ -589,8 +589,8 @@ public function lazy($chunkSize = 1000)
      * Query lazily, by chunking the results of a query by comparing IDs.
      *
      * @param  int  $chunkSize
-     * @param  string|null  $column
-     * @param  string|null  $alias
+     * @param  ?string  $column
+     * @param  ?string  $alias
      * @return \Illuminate\Support\LazyCollection
      */
     public function lazyById($chunkSize = 1000, $column = null, $alias = null)
diff --git a/src/Illuminate/Database/Eloquent/Relations/HasOne.php b/src/Illuminate/Database/Eloquent/Relations/HasOne.php
index ed85f1e910ee..ea85989617b0 100755
--- a/src/Illuminate/Database/Eloquent/Relations/HasOne.php
+++ b/src/Illuminate/Database/Eloquent/Relations/HasOne.php
@@ -81,8 +81,8 @@ public function getRelationExistenceQuery(Builder $query, Builder $parentQuery,
      * Add constraints for inner join subselect for one of many relationships.
      *
      * @param  \Illuminate\Database\Eloquent\Builder  $query
-     * @param  string|null  $column
-     * @param  string|null  $aggregate
+     * @param  ?string  $column
+     * @param  ?string  $aggregate
      * @return void
      */
     public function addOneOfManySubQueryConstraints(Builder $query, $column = null, $aggregate = null)
diff --git a/src/Illuminate/Database/Eloquent/Relations/MorphOne.php b/src/Illuminate/Database/Eloquent/Relations/MorphOne.php
index fc8f4dc8ca48..c8e8e6c620e8 100755
--- a/src/Illuminate/Database/Eloquent/Relations/MorphOne.php
+++ b/src/Illuminate/Database/Eloquent/Relations/MorphOne.php
@@ -79,8 +79,8 @@ public function getRelationExistenceQuery(Builder $query, Builder $parentQuery,
      * Add constraints for inner join subselect for one of many relationships.
      *
      * @param  \Illuminate\Database\Eloquent\Builder  $query
-     * @param  string|null  $column
-     * @param  string|null  $aggregate
+     * @param  ?string  $column
+     * @param  ?string  $aggregate
      * @return void
      */
     public function addOneOfManySubQueryConstraints(Builder $query, $column = null, $aggregate = null)
diff --git a/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php b/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php
index c2d574558224..65dcf6057094 100644
--- a/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php
+++ b/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php
@@ -42,7 +42,7 @@ class MorphToMany extends BelongsToMany
      * @param  string  $relatedPivotKey
      * @param  string  $parentKey
      * @param  string  $relatedKey
-     * @param  string|null  $relationName
+     * @param  ?string  $relationName
      * @param  bool  $inverse
      * @return void
      */
diff --git a/src/Illuminate/Database/Eloquent/Relations/Relation.php b/src/Illuminate/Database/Eloquent/Relations/Relation.php
index 6523ca0dca0d..5db0d19c29cb 100755
--- a/src/Illuminate/Database/Eloquent/Relations/Relation.php
+++ b/src/Illuminate/Database/Eloquent/Relations/Relation.php
@@ -268,7 +268,7 @@ public function getRelationCountHash($incrementJoinCount = true)
      * Get all of the primary keys for an array of models.
      *
      * @param  array  $models
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return array
      */
     protected function getKeys(array $models, $key = null)
@@ -468,7 +468,7 @@ protected static function buildMorphMapFromModels(array $models = null)
      * Get the model associated with a custom polymorphic type.
      *
      * @param  string  $alias
-     * @return string|null
+     * @return ?string
      */
     public static function getMorphedModel($alias)
     {
diff --git a/src/Illuminate/Database/Migrations/Migration.php b/src/Illuminate/Database/Migrations/Migration.php
index a58f7848a7e1..fb3f21da9265 100755
--- a/src/Illuminate/Database/Migrations/Migration.php
+++ b/src/Illuminate/Database/Migrations/Migration.php
@@ -7,7 +7,7 @@ abstract class Migration
     /**
      * The name of the database connection to use.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $connection;
 
@@ -21,7 +21,7 @@ abstract class Migration
     /**
      * Get the migration connection name.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getConnection()
     {
diff --git a/src/Illuminate/Database/Migrations/MigrationCreator.php b/src/Illuminate/Database/Migrations/MigrationCreator.php
index d8f1ce9d0b1e..8eaddfbcef1c 100755
--- a/src/Illuminate/Database/Migrations/MigrationCreator.php
+++ b/src/Illuminate/Database/Migrations/MigrationCreator.php
@@ -48,7 +48,7 @@ public function __construct(Filesystem $files, $customStubPath)
      *
      * @param  string  $name
      * @param  string  $path
-     * @param  string|null  $table
+     * @param  ?string  $table
      * @param  bool  $create
      * @return string
      *
@@ -106,7 +106,7 @@ protected function ensureMigrationDoesntAlreadyExist($name, $migrationPath = nul
     /**
      * Get the migration stub file.
      *
-     * @param  string|null  $table
+     * @param  ?string  $table
      * @param  bool  $create
      * @return string
      */
@@ -133,7 +133,7 @@ protected function getStub($table, $create)
      * Populate the place-holders in the migration stub.
      *
      * @param  string  $stub
-     * @param  string|null  $table
+     * @param  ?string  $table
      * @return string
      */
     protected function populateStub($stub, $table)
@@ -177,7 +177,7 @@ protected function getPath($name, $path)
     /**
      * Fire the registered post create hooks.
      *
-     * @param  string|null  $table
+     * @param  ?string  $table
      * @param  string  $path
      * @return void
      */
diff --git a/src/Illuminate/Database/PDO/Concerns/ConnectsToDatabase.php b/src/Illuminate/Database/PDO/Concerns/ConnectsToDatabase.php
index d2a8d6006df3..236b6ad71051 100644
--- a/src/Illuminate/Database/PDO/Concerns/ConnectsToDatabase.php
+++ b/src/Illuminate/Database/PDO/Concerns/ConnectsToDatabase.php
@@ -12,8 +12,8 @@ trait ConnectsToDatabase
      * Create a new database connection.
      *
      * @param  mixed[]  $params
-     * @param  string|null  $username
-     * @param  string|null  $password
+     * @param  ?string  $username
+     * @param  ?string  $password
      * @param  mixed[]  $driverOptions
      * @return \Illuminate\Database\PDO\Connection
      *
diff --git a/src/Illuminate/Database/PDO/Connection.php b/src/Illuminate/Database/PDO/Connection.php
index 7bae4cc04948..c0b8350dafac 100644
--- a/src/Illuminate/Database/PDO/Connection.php
+++ b/src/Illuminate/Database/PDO/Connection.php
@@ -91,7 +91,7 @@ public function query(string $sql): ResultInterface
     /**
      * Get the last insert ID.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return mixed
      */
     public function lastInsertId($name = null)
diff --git a/src/Illuminate/Database/PDO/SqlServerConnection.php b/src/Illuminate/Database/PDO/SqlServerConnection.php
index 0f09c3a94f04..8e6e030048a5 100644
--- a/src/Illuminate/Database/PDO/SqlServerConnection.php
+++ b/src/Illuminate/Database/PDO/SqlServerConnection.php
@@ -67,7 +67,7 @@ public function exec(string $statement): int
     /**
      * Get the last insert ID.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return mixed
      */
     public function lastInsertId($name = null)
diff --git a/src/Illuminate/Database/PDO/SqlServerDriver.php b/src/Illuminate/Database/PDO/SqlServerDriver.php
index 1b0d9574e748..7ebd9520eefd 100644
--- a/src/Illuminate/Database/PDO/SqlServerDriver.php
+++ b/src/Illuminate/Database/PDO/SqlServerDriver.php
@@ -10,8 +10,8 @@ class SqlServerDriver extends AbstractSQLServerDriver
      * Create a new database connection.
      *
      * @param  mixed[]  $params
-     * @param  string|null  $username
-     * @param  string|null  $password
+     * @param  ?string  $username
+     * @param  ?string  $password
      * @param  mixed[]  $driverOptions
      * @return \Illuminate\Database\PDO\SqlServerConnection
      */
diff --git a/src/Illuminate/Database/Query/Builder.php b/src/Illuminate/Database/Query/Builder.php
index bb874bbdc6c7..6f1504b0635c 100755
--- a/src/Illuminate/Database/Query/Builder.php
+++ b/src/Illuminate/Database/Query/Builder.php
@@ -440,7 +440,7 @@ public function distinct()
      * Set the table which the query is targeting.
      *
      * @param  \Closure|\Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder|string  $table
-     * @param  string|null  $as
+     * @param  ?string  $as
      * @return $this
      */
     public function from($table, $as = null)
@@ -459,8 +459,8 @@ public function from($table, $as = null)
      *
      * @param  string  $table
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @param  string  $type
      * @param  bool  $where
      * @return $this
@@ -515,8 +515,8 @@ public function joinWhere($table, $first, $operator, $second, $type = 'inner')
      * @param  \Closure|\Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder|string  $query
      * @param  string  $as
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @param  string  $type
      * @param  bool  $where
      * @return $this
@@ -539,8 +539,8 @@ public function joinSub($query, $as, $first, $operator = null, $second = null, $
      *
      * @param  string  $table
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @return $this
      */
     public function leftJoin($table, $first, $operator = null, $second = null)
@@ -568,8 +568,8 @@ public function leftJoinWhere($table, $first, $operator, $second)
      * @param  \Closure|\Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder|string  $query
      * @param  string  $as
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @return $this
      */
     public function leftJoinSub($query, $as, $first, $operator = null, $second = null)
@@ -582,8 +582,8 @@ public function leftJoinSub($query, $as, $first, $operator = null, $second = nul
      *
      * @param  string  $table
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @return $this
      */
     public function rightJoin($table, $first, $operator = null, $second = null)
@@ -611,8 +611,8 @@ public function rightJoinWhere($table, $first, $operator, $second)
      * @param  \Closure|\Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder|string  $query
      * @param  string  $as
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @return $this
      */
     public function rightJoinSub($query, $as, $first, $operator = null, $second = null)
@@ -625,8 +625,8 @@ public function rightJoinSub($query, $as, $first, $operator = null, $second = nu
      *
      * @param  string  $table
      * @param  \Closure|string|null  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @return $this
      */
     public function crossJoin($table, $first = null, $operator = null, $second = null)
@@ -920,9 +920,9 @@ public function orWhereNot($column, $operator = null, $value = null)
      * Add a "where" clause comparing two columns to the query.
      *
      * @param  string|array  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
-     * @param  string|null  $boolean
+     * @param  ?string  $operator
+     * @param  ?string  $second
+     * @param  ?string  $boolean
      * @return $this
      */
     public function whereColumn($first, $operator = null, $second = null, $boolean = 'and')
@@ -957,8 +957,8 @@ public function whereColumn($first, $operator = null, $second = null, $boolean =
      * Add an "or where" clause comparing two columns to the query.
      *
      * @param  string|array  $first
-     * @param  string|null  $operator
-     * @param  string|null  $second
+     * @param  ?string  $operator
+     * @param  ?string  $second
      * @return $this
      */
     public function orWhereColumn($first, $operator = null, $second = null)
@@ -2855,7 +2855,7 @@ protected function enforceOrderBy()
      * Get a collection instance containing the values of a given column.
      *
      * @param  string  $column
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return \Illuminate\Support\Collection
      */
     public function pluck($column, $key = null)
@@ -2892,7 +2892,7 @@ function () {
      * Strip off the table name or alias from a column identifier.
      *
      * @param  string  $column
-     * @return string|null
+     * @return ?string
      */
     protected function stripTableForPluck($column)
     {
@@ -3258,7 +3258,7 @@ public function insertOrIgnore(array $values)
      * Insert a new record and get the value of the primary key.
      *
      * @param  array  $values
-     * @param  string|null  $sequence
+     * @param  ?string  $sequence
      * @return int
      */
     public function insertGetId(array $values, $sequence = null)
diff --git a/src/Illuminate/Database/Query/Grammars/Grammar.php b/src/Illuminate/Database/Query/Grammars/Grammar.php
index 5540c8650d22..80fc0fc9d6f3 100755
--- a/src/Illuminate/Database/Query/Grammars/Grammar.php
+++ b/src/Illuminate/Database/Query/Grammars/Grammar.php
@@ -132,7 +132,7 @@ protected function compileAggregate(Builder $query, $aggregate)
      *
      * @param  \Illuminate\Database\Query\Builder  $query
      * @param  array  $columns
-     * @return string|null
+     * @return ?string
      */
     protected function compileColumns(Builder $query, $columns)
     {
diff --git a/src/Illuminate/Database/Query/Grammars/PostgresGrammar.php b/src/Illuminate/Database/Query/Grammars/PostgresGrammar.php
index ad4678b0c9c2..8a858d2df286 100755
--- a/src/Illuminate/Database/Query/Grammars/PostgresGrammar.php
+++ b/src/Illuminate/Database/Query/Grammars/PostgresGrammar.php
@@ -180,7 +180,7 @@ protected function validFullTextLanguages()
      *
      * @param  \Illuminate\Database\Query\Builder  $query
      * @param  array  $columns
-     * @return string|null
+     * @return ?string
      */
     protected function compileColumns(Builder $query, $columns)
     {
diff --git a/src/Illuminate/Database/Query/Grammars/SqlServerGrammar.php b/src/Illuminate/Database/Query/Grammars/SqlServerGrammar.php
index 222a2f129491..953949fc945d 100755
--- a/src/Illuminate/Database/Query/Grammars/SqlServerGrammar.php
+++ b/src/Illuminate/Database/Query/Grammars/SqlServerGrammar.php
@@ -54,7 +54,7 @@ public function compileSelect(Builder $query)
      *
      * @param  \Illuminate\Database\Query\Builder  $query
      * @param  array  $columns
-     * @return string|null
+     * @return ?string
      */
     protected function compileColumns(Builder $query, $columns)
     {
diff --git a/src/Illuminate/Database/Query/JoinClause.php b/src/Illuminate/Database/Query/JoinClause.php
index 57d650a38cb1..e0e1b51f8eba 100755
--- a/src/Illuminate/Database/Query/JoinClause.php
+++ b/src/Illuminate/Database/Query/JoinClause.php
@@ -83,7 +83,7 @@ public function __construct(Builder $parentQuery, $type, $table)
      * on `contacts`.`user_id` = `users`.`id` and `contacts`.`info_id` = `info`.`id`
      *
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
+     * @param  ?string  $operator
      * @param  \Illuminate\Database\Query\Expression|string|null  $second
      * @param  string  $boolean
      * @return $this
@@ -103,7 +103,7 @@ public function on($first, $operator = null, $second = null, $boolean = 'and')
      * Add an "or on" clause to the join.
      *
      * @param  \Closure|string  $first
-     * @param  string|null  $operator
+     * @param  ?string  $operator
      * @param  \Illuminate\Database\Query\Expression|string|null  $second
      * @return \Illuminate\Database\Query\JoinClause
      */
diff --git a/src/Illuminate/Database/Query/Processors/PostgresProcessor.php b/src/Illuminate/Database/Query/Processors/PostgresProcessor.php
index 5956a8fb3148..c1b0a5e7ef63 100755
--- a/src/Illuminate/Database/Query/Processors/PostgresProcessor.php
+++ b/src/Illuminate/Database/Query/Processors/PostgresProcessor.php
@@ -12,7 +12,7 @@ class PostgresProcessor extends Processor
      * @param  \Illuminate\Database\Query\Builder  $query
      * @param  string  $sql
      * @param  array  $values
-     * @param  string|null  $sequence
+     * @param  ?string  $sequence
      * @return int
      */
     public function processInsertGetId(Builder $query, $sql, $values, $sequence = null)
diff --git a/src/Illuminate/Database/Query/Processors/Processor.php b/src/Illuminate/Database/Query/Processors/Processor.php
index 0069b436d553..7c866e935d83 100755
--- a/src/Illuminate/Database/Query/Processors/Processor.php
+++ b/src/Illuminate/Database/Query/Processors/Processor.php
@@ -24,7 +24,7 @@ public function processSelect(Builder $query, $results)
      * @param  \Illuminate\Database\Query\Builder  $query
      * @param  string  $sql
      * @param  array  $values
-     * @param  string|null  $sequence
+     * @param  ?string  $sequence
      * @return int
      */
     public function processInsertGetId(Builder $query, $sql, $values, $sequence = null)
diff --git a/src/Illuminate/Database/Query/Processors/SqlServerProcessor.php b/src/Illuminate/Database/Query/Processors/SqlServerProcessor.php
index 49476f095594..2836c92a3314 100755
--- a/src/Illuminate/Database/Query/Processors/SqlServerProcessor.php
+++ b/src/Illuminate/Database/Query/Processors/SqlServerProcessor.php
@@ -14,7 +14,7 @@ class SqlServerProcessor extends Processor
      * @param  \Illuminate\Database\Query\Builder  $query
      * @param  string  $sql
      * @param  array  $values
-     * @param  string|null  $sequence
+     * @param  ?string  $sequence
      * @return int
      */
     public function processInsertGetId(Builder $query, $sql, $values, $sequence = null)
diff --git a/src/Illuminate/Database/Schema/Blueprint.php b/src/Illuminate/Database/Schema/Blueprint.php
index 3ea7d15a2163..02f5a82dc23b 100755
--- a/src/Illuminate/Database/Schema/Blueprint.php
+++ b/src/Illuminate/Database/Schema/Blueprint.php
@@ -428,7 +428,7 @@ public function dropConstrainedForeignId($column)
      * Indicate that the given foreign key should be dropped.
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $model
-     * @param  string|null  $column
+     * @param  ?string  $column
      * @return \Illuminate\Support\Fluent
      */
     public function dropForeignIdFor($model, $column = null)
@@ -444,7 +444,7 @@ public function dropForeignIdFor($model, $column = null)
      * Indicate that the given foreign key should be dropped.
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $model
-     * @param  string|null  $column
+     * @param  ?string  $column
      * @return \Illuminate\Support\Fluent
      */
     public function dropConstrainedForeignIdFor($model, $column = null)
@@ -524,7 +524,7 @@ public function dropRememberToken()
      * Indicate that the polymorphic columns should be dropped.
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function dropMorphs($name, $indexName = null)
@@ -549,8 +549,8 @@ public function rename($to)
      * Specify the primary key(s) for the table.
      *
      * @param  string|array  $columns
-     * @param  string|null  $name
-     * @param  string|null  $algorithm
+     * @param  ?string  $name
+     * @param  ?string  $algorithm
      * @return \Illuminate\Database\Schema\IndexDefinition
      */
     public function primary($columns, $name = null, $algorithm = null)
@@ -562,8 +562,8 @@ public function primary($columns, $name = null, $algorithm = null)
      * Specify a unique index for the table.
      *
      * @param  string|array  $columns
-     * @param  string|null  $name
-     * @param  string|null  $algorithm
+     * @param  ?string  $name
+     * @param  ?string  $algorithm
      * @return \Illuminate\Database\Schema\IndexDefinition
      */
     public function unique($columns, $name = null, $algorithm = null)
@@ -575,8 +575,8 @@ public function unique($columns, $name = null, $algorithm = null)
      * Specify an index for the table.
      *
      * @param  string|array  $columns
-     * @param  string|null  $name
-     * @param  string|null  $algorithm
+     * @param  ?string  $name
+     * @param  ?string  $algorithm
      * @return \Illuminate\Database\Schema\IndexDefinition
      */
     public function index($columns, $name = null, $algorithm = null)
@@ -588,8 +588,8 @@ public function index($columns, $name = null, $algorithm = null)
      * Specify an fulltext for the table.
      *
      * @param  string|array  $columns
-     * @param  string|null  $name
-     * @param  string|null  $algorithm
+     * @param  ?string  $name
+     * @param  ?string  $algorithm
      * @return \Illuminate\Database\Schema\IndexDefinition
      */
     public function fullText($columns, $name = null, $algorithm = null)
@@ -601,7 +601,7 @@ public function fullText($columns, $name = null, $algorithm = null)
      * Specify a spatial index for the table.
      *
      * @param  string|array  $columns
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\Schema\IndexDefinition
      */
     public function spatialIndex($columns, $name = null)
@@ -625,7 +625,7 @@ public function rawIndex($expression, $name)
      * Specify a foreign key for the table.
      *
      * @param  string|array  $columns
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\Schema\ForeignKeyDefinition
      */
     public function foreign($columns, $name = null)
@@ -933,7 +933,7 @@ public function foreignId($column)
      * Create a foreign ID column for the given model.
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $model
-     * @param  string|null  $column
+     * @param  ?string  $column
      * @return \Illuminate\Database\Schema\ForeignIdColumnDefinition
      */
     public function foreignIdFor($model, $column = null)
@@ -1444,7 +1444,7 @@ public function computed($column, $expression)
      * Add the proper columns for a polymorphic table.
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function morphs($name, $indexName = null)
@@ -1462,7 +1462,7 @@ public function morphs($name, $indexName = null)
      * Add nullable columns for a polymorphic table.
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function nullableMorphs($name, $indexName = null)
@@ -1480,7 +1480,7 @@ public function nullableMorphs($name, $indexName = null)
      * Add the proper columns for a polymorphic table using numeric IDs (incremental).
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function numericMorphs($name, $indexName = null)
@@ -1496,7 +1496,7 @@ public function numericMorphs($name, $indexName = null)
      * Add nullable columns for a polymorphic table using numeric IDs (incremental).
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function nullableNumericMorphs($name, $indexName = null)
@@ -1512,7 +1512,7 @@ public function nullableNumericMorphs($name, $indexName = null)
      * Add the proper columns for a polymorphic table using UUIDs.
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function uuidMorphs($name, $indexName = null)
@@ -1528,7 +1528,7 @@ public function uuidMorphs($name, $indexName = null)
      * Add nullable columns for a polymorphic table using UUIDs.
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function nullableUuidMorphs($name, $indexName = null)
@@ -1544,7 +1544,7 @@ public function nullableUuidMorphs($name, $indexName = null)
      * Add the proper columns for a polymorphic table using ULIDs.
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function ulidMorphs($name, $indexName = null)
@@ -1560,7 +1560,7 @@ public function ulidMorphs($name, $indexName = null)
      * Add nullable columns for a polymorphic table using ULIDs.
      *
      * @param  string  $name
-     * @param  string|null  $indexName
+     * @param  ?string  $indexName
      * @return void
      */
     public function nullableUlidMorphs($name, $indexName = null)
@@ -1599,7 +1599,7 @@ public function comment($comment)
      * @param  string  $type
      * @param  string|array  $columns
      * @param  string  $index
-     * @param  string|null  $algorithm
+     * @param  ?string  $algorithm
      * @return \Illuminate\Support\Fluent
      */
     protected function indexCommand($type, $columns, $index, $algorithm = null)
diff --git a/src/Illuminate/Database/Schema/ForeignIdColumnDefinition.php b/src/Illuminate/Database/Schema/ForeignIdColumnDefinition.php
index 354b248d2973..0c256036a6ad 100644
--- a/src/Illuminate/Database/Schema/ForeignIdColumnDefinition.php
+++ b/src/Illuminate/Database/Schema/ForeignIdColumnDefinition.php
@@ -30,7 +30,7 @@ public function __construct(Blueprint $blueprint, $attributes = [])
     /**
      * Create a foreign key constraint on this column referencing the "id" column of the conventionally related table.
      *
-     * @param  string|null  $table
+     * @param  ?string  $table
      * @param  string  $column
      * @return \Illuminate\Database\Schema\ForeignKeyDefinition
      */
diff --git a/src/Illuminate/Database/Schema/Grammars/ChangeColumn.php b/src/Illuminate/Database/Schema/Grammars/ChangeColumn.php
index 9579222991b7..54238b4a7bd5 100644
--- a/src/Illuminate/Database/Schema/Grammars/ChangeColumn.php
+++ b/src/Illuminate/Database/Schema/Grammars/ChangeColumn.php
@@ -208,7 +208,7 @@ protected static function doesntNeedCharacterOptions($type)
      * Get the matching Doctrine option for a given Fluent attribute name.
      *
      * @param  string  $attribute
-     * @return string|null
+     * @return ?string
      */
     protected static function mapFluentOptionToDoctrine($attribute)
     {
diff --git a/src/Illuminate/Database/Schema/Grammars/MySqlGrammar.php b/src/Illuminate/Database/Schema/Grammars/MySqlGrammar.php
index f87acfd63ff3..b6317a3e9766 100755
--- a/src/Illuminate/Database/Schema/Grammars/MySqlGrammar.php
+++ b/src/Illuminate/Database/Schema/Grammars/MySqlGrammar.php
@@ -991,7 +991,7 @@ protected function typeComputed(Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyVirtualAs(Blueprint $blueprint, Fluent $column)
     {
@@ -1013,7 +1013,7 @@ protected function modifyVirtualAs(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyStoredAs(Blueprint $blueprint, Fluent $column)
     {
@@ -1035,7 +1035,7 @@ protected function modifyStoredAs(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyUnsigned(Blueprint $blueprint, Fluent $column)
     {
@@ -1049,7 +1049,7 @@ protected function modifyUnsigned(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyCharset(Blueprint $blueprint, Fluent $column)
     {
@@ -1063,7 +1063,7 @@ protected function modifyCharset(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyCollate(Blueprint $blueprint, Fluent $column)
     {
@@ -1077,7 +1077,7 @@ protected function modifyCollate(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyNullable(Blueprint $blueprint, Fluent $column)
     {
@@ -1098,7 +1098,7 @@ protected function modifyNullable(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyInvisible(Blueprint $blueprint, Fluent $column)
     {
@@ -1112,7 +1112,7 @@ protected function modifyInvisible(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyDefault(Blueprint $blueprint, Fluent $column)
     {
@@ -1126,7 +1126,7 @@ protected function modifyDefault(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyIncrement(Blueprint $blueprint, Fluent $column)
     {
@@ -1140,7 +1140,7 @@ protected function modifyIncrement(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyFirst(Blueprint $blueprint, Fluent $column)
     {
@@ -1154,7 +1154,7 @@ protected function modifyFirst(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyAfter(Blueprint $blueprint, Fluent $column)
     {
@@ -1168,7 +1168,7 @@ protected function modifyAfter(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyComment(Blueprint $blueprint, Fluent $column)
     {
@@ -1182,7 +1182,7 @@ protected function modifyComment(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifySrid(Blueprint $blueprint, Fluent $column)
     {
diff --git a/src/Illuminate/Database/Schema/Grammars/PostgresGrammar.php b/src/Illuminate/Database/Schema/Grammars/PostgresGrammar.php
index ef60d0ff820f..3a19b6852cb6 100755
--- a/src/Illuminate/Database/Schema/Grammars/PostgresGrammar.php
+++ b/src/Illuminate/Database/Schema/Grammars/PostgresGrammar.php
@@ -1062,7 +1062,7 @@ private function formatPostGisType($type, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyCollate(Blueprint $blueprint, Fluent $column)
     {
@@ -1076,7 +1076,7 @@ protected function modifyCollate(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyNullable(Blueprint $blueprint, Fluent $column)
     {
@@ -1088,7 +1088,7 @@ protected function modifyNullable(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyDefault(Blueprint $blueprint, Fluent $column)
     {
@@ -1102,7 +1102,7 @@ protected function modifyDefault(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyIncrement(Blueprint $blueprint, Fluent $column)
     {
@@ -1116,7 +1116,7 @@ protected function modifyIncrement(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyVirtualAs(Blueprint $blueprint, Fluent $column)
     {
@@ -1130,7 +1130,7 @@ protected function modifyVirtualAs(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyStoredAs(Blueprint $blueprint, Fluent $column)
     {
diff --git a/src/Illuminate/Database/Schema/Grammars/SQLiteGrammar.php b/src/Illuminate/Database/Schema/Grammars/SQLiteGrammar.php
index c9d1c5503aaa..3f281af5623f 100755
--- a/src/Illuminate/Database/Schema/Grammars/SQLiteGrammar.php
+++ b/src/Illuminate/Database/Schema/Grammars/SQLiteGrammar.php
@@ -68,7 +68,7 @@ public function compileCreate(Blueprint $blueprint, Fluent $command)
      * Get the foreign key syntax for a table creation statement.
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
-     * @return string|null
+     * @return ?string
      */
     protected function addForeignKeys(Blueprint $blueprint)
     {
@@ -117,7 +117,7 @@ protected function getForeignKey($foreign)
      * Get the primary key syntax for a table creation statement.
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
-     * @return string|null
+     * @return ?string
      */
     protected function addPrimaryKeys(Blueprint $blueprint)
     {
@@ -902,7 +902,7 @@ protected function typeComputed(Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyVirtualAs(Blueprint $blueprint, Fluent $column)
     {
@@ -924,7 +924,7 @@ protected function modifyVirtualAs(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyStoredAs(Blueprint $blueprint, Fluent $column)
     {
@@ -946,7 +946,7 @@ protected function modifyStoredAs(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyNullable(Blueprint $blueprint, Fluent $column)
     {
@@ -967,7 +967,7 @@ protected function modifyNullable(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyDefault(Blueprint $blueprint, Fluent $column)
     {
@@ -981,7 +981,7 @@ protected function modifyDefault(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyIncrement(Blueprint $blueprint, Fluent $column)
     {
diff --git a/src/Illuminate/Database/Schema/Grammars/SqlServerGrammar.php b/src/Illuminate/Database/Schema/Grammars/SqlServerGrammar.php
index 4d7271ca3308..9947f8c320e9 100755
--- a/src/Illuminate/Database/Schema/Grammars/SqlServerGrammar.php
+++ b/src/Illuminate/Database/Schema/Grammars/SqlServerGrammar.php
@@ -864,7 +864,7 @@ public function typeMultiPolygon(Fluent $column)
      * Create the column definition for a generated, computed column type.
      *
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function typeComputed(Fluent $column)
     {
@@ -876,7 +876,7 @@ protected function typeComputed(Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyCollate(Blueprint $blueprint, Fluent $column)
     {
@@ -890,7 +890,7 @@ protected function modifyCollate(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyNullable(Blueprint $blueprint, Fluent $column)
     {
@@ -904,7 +904,7 @@ protected function modifyNullable(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyDefault(Blueprint $blueprint, Fluent $column)
     {
@@ -918,7 +918,7 @@ protected function modifyDefault(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyIncrement(Blueprint $blueprint, Fluent $column)
     {
@@ -932,7 +932,7 @@ protected function modifyIncrement(Blueprint $blueprint, Fluent $column)
      *
      * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
      * @param  \Illuminate\Support\Fluent  $column
-     * @return string|null
+     * @return ?string
      */
     protected function modifyPersisted(Blueprint $blueprint, Fluent $column)
     {
diff --git a/src/Illuminate/Events/QueuedClosure.php b/src/Illuminate/Events/QueuedClosure.php
index 31a462ace41f..c0aaa24e2036 100644
--- a/src/Illuminate/Events/QueuedClosure.php
+++ b/src/Illuminate/Events/QueuedClosure.php
@@ -17,14 +17,14 @@ class QueuedClosure
     /**
      * The name of the connection the job should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $connection;
 
     /**
      * The name of the queue the job should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $queue;
 
@@ -56,7 +56,7 @@ public function __construct(Closure $closure)
     /**
      * Set the desired connection for the job.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     public function onConnection($connection)
@@ -69,7 +69,7 @@ public function onConnection($connection)
     /**
      * Set the desired queue for the job.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return $this
      */
     public function onQueue($queue)
diff --git a/src/Illuminate/Filesystem/Filesystem.php b/src/Illuminate/Filesystem/Filesystem.php
index 16149cffc5b1..91641b5d85d5 100644
--- a/src/Illuminate/Filesystem/Filesystem.php
+++ b/src/Illuminate/Filesystem/Filesystem.php
@@ -410,7 +410,7 @@ public function extension($path)
      * Guess the file extension from the mime-type of a given file.
      *
      * @param  string  $path
-     * @return string|null
+     * @return ?string
      *
      * @throws \RuntimeException
      */
diff --git a/src/Illuminate/Filesystem/FilesystemAdapter.php b/src/Illuminate/Filesystem/FilesystemAdapter.php
index 87606c974f0b..c932ab618247 100644
--- a/src/Illuminate/Filesystem/FilesystemAdapter.php
+++ b/src/Illuminate/Filesystem/FilesystemAdapter.php
@@ -106,7 +106,7 @@ public function __construct(FilesystemOperator $driver, FlysystemAdapter $adapte
      * Assert that the given file or directory exists.
      *
      * @param  string|array  $path
-     * @param  string|null  $content
+     * @param  ?string  $content
      * @return $this
      */
     public function assertExists($path, $content = null)
@@ -251,7 +251,7 @@ public function path($path)
      * Get the contents of a file.
      *
      * @param  string  $path
-     * @return string|null
+     * @return ?string
      */
     public function get($path)
     {
@@ -266,9 +266,9 @@ public function get($path)
      * Create a streamed response for a given file.
      *
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $headers
-     * @param  string|null  $disposition
+     * @param  ?string  $disposition
      * @return \Symfony\Component\HttpFoundation\StreamedResponse
      */
     public function response($path, $name = null, array $headers = [], $disposition = 'inline')
@@ -308,7 +308,7 @@ public function response($path, $name = null, array $headers = [], $disposition
      * Create a streamed download response for a given file.
      *
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Symfony\Component\HttpFoundation\StreamedResponse
      */
     public function download($path, $name = null, array $headers = [])
@@ -765,7 +765,7 @@ protected function replaceBaseUrl($uri, $url)
     /**
      * Get an array of all files in a directory.
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @param  bool  $recursive
      * @return array
      */
@@ -785,7 +785,7 @@ public function files($directory = null, $recursive = false)
     /**
      * Get all of the files from the given directory (recursive).
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @return array
      */
     public function allFiles($directory = null)
@@ -796,7 +796,7 @@ public function allFiles($directory = null)
     /**
      * Get all of the directories within a given directory.
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @param  bool  $recursive
      * @return array
      */
@@ -815,7 +815,7 @@ public function directories($directory = null, $recursive = false)
     /**
      * Get all the directories within a given directory (recursive).
      *
-     * @param  string|null  $directory
+     * @param  ?string  $directory
      * @return array
      */
     public function allDirectories($directory = null)
@@ -894,8 +894,8 @@ public function getConfig()
     /**
      * Parse the given visibility value.
      *
-     * @param  string|null  $visibility
-     * @return string|null
+     * @param  ?string  $visibility
+     * @return ?string
      *
      * @throws \InvalidArgumentException
      */
diff --git a/src/Illuminate/Filesystem/FilesystemManager.php b/src/Illuminate/Filesystem/FilesystemManager.php
index 0475c40e0363..a8cfe52317c6 100644
--- a/src/Illuminate/Filesystem/FilesystemManager.php
+++ b/src/Illuminate/Filesystem/FilesystemManager.php
@@ -62,7 +62,7 @@ public function __construct($app)
     /**
      * Get a filesystem instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Filesystem\Filesystem
      */
     public function drive($name = null)
@@ -73,7 +73,7 @@ public function drive($name = null)
     /**
      * Get a filesystem instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Filesystem\Filesystem
      */
     public function disk($name = null)
@@ -378,7 +378,7 @@ public function forgetDisk($disk)
     /**
      * Disconnect the given disk and remove from local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function purge($name = null)
diff --git a/src/Illuminate/Foundation/Application.php b/src/Illuminate/Foundation/Application.php
index f098f742bc73..6fe3299e78d8 100755
--- a/src/Illuminate/Foundation/Application.php
+++ b/src/Illuminate/Foundation/Application.php
@@ -169,7 +169,7 @@ class Application extends Container implements ApplicationContract, CachesConfig
     /**
      * Create a new Illuminate application instance.
      *
-     * @param  string|null  $basePath
+     * @param  ?string  $basePath
      * @return void
      */
     public function __construct($basePath = null)
@@ -810,7 +810,7 @@ public function loadDeferredProvider($service)
      * Register a deferred provider and service.
      *
      * @param  string  $provider
-     * @param  string|null  $service
+     * @param  ?string  $service
      * @return void
      */
     public function registerDeferredProvider($provider, $service = null)
diff --git a/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php b/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php
index a67649b931f8..68d0c31cbd1f 100644
--- a/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php
+++ b/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php
@@ -17,7 +17,7 @@ class HandleExceptions
     /**
      * Reserved memory so that errors can be displayed properly on memory exhaustion.
      *
-     * @var string|null
+     * @var ?string
      */
     public static $reservedMemory;
 
diff --git a/src/Illuminate/Foundation/Bus/PendingChain.php b/src/Illuminate/Foundation/Bus/PendingChain.php
index b56b773ea9b8..0b721e202e8c 100644
--- a/src/Illuminate/Foundation/Bus/PendingChain.php
+++ b/src/Illuminate/Foundation/Bus/PendingChain.php
@@ -26,14 +26,14 @@ class PendingChain
     /**
      * The name of the connection the chain should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $connection;
 
     /**
      * The name of the queue the chain should be sent to.
      *
-     * @var string|null
+     * @var ?string
      */
     public $queue;
 
@@ -67,7 +67,7 @@ public function __construct($job, $chain)
     /**
      * Set the desired connection for the job.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     public function onConnection($connection)
@@ -80,7 +80,7 @@ public function onConnection($connection)
     /**
      * Set the desired queue for the job.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return $this
      */
     public function onQueue($queue)
diff --git a/src/Illuminate/Foundation/Bus/PendingDispatch.php b/src/Illuminate/Foundation/Bus/PendingDispatch.php
index 1e514e5b0b78..d28bff2229e8 100644
--- a/src/Illuminate/Foundation/Bus/PendingDispatch.php
+++ b/src/Illuminate/Foundation/Bus/PendingDispatch.php
@@ -38,7 +38,7 @@ public function __construct($job)
     /**
      * Set the desired connection for the job.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     public function onConnection($connection)
@@ -51,7 +51,7 @@ public function onConnection($connection)
     /**
      * Set the desired queue for the job.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return $this
      */
     public function onQueue($queue)
@@ -64,7 +64,7 @@ public function onQueue($queue)
     /**
      * Set the desired connection for the chain.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     public function allOnConnection($connection)
@@ -77,7 +77,7 @@ public function allOnConnection($connection)
     /**
      * Set the desired queue for the chain.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return $this
      */
     public function allOnQueue($queue)
diff --git a/src/Illuminate/Foundation/Concerns/ResolvesDumpSource.php b/src/Illuminate/Foundation/Concerns/ResolvesDumpSource.php
index 7e0dfffa7556..d9a4003fb3e3 100644
--- a/src/Illuminate/Foundation/Concerns/ResolvesDumpSource.php
+++ b/src/Illuminate/Foundation/Concerns/ResolvesDumpSource.php
@@ -143,7 +143,7 @@ protected function getOriginalFileForCompiledView($file)
      *
      * @param  string  $file
      * @param  int|null  $line
-     * @return string|null
+     * @return ?string
      */
     protected function resolveSourceHref($file, $line)
     {
diff --git a/src/Illuminate/Foundation/Console/AboutCommand.php b/src/Illuminate/Foundation/Console/AboutCommand.php
index c6a38ce9cb4d..974846911acf 100644
--- a/src/Illuminate/Foundation/Console/AboutCommand.php
+++ b/src/Illuminate/Foundation/Console/AboutCommand.php
@@ -23,7 +23,7 @@ class AboutCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
@@ -225,7 +225,7 @@ protected function hasPhpFiles(string $path): bool
      *
      * @param  string  $section
      * @param  callable|string|array  $data
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @return void
      */
     public static function add(string $section, $data, string $value = null)
@@ -238,7 +238,7 @@ public static function add(string $section, $data, string $value = null)
      *
      * @param  string  $section
      * @param  callable|string|array  $data
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @return void
      */
     protected static function addToSection(string $section, $data, string $value = null)
diff --git a/src/Illuminate/Foundation/Console/CastMakeCommand.php b/src/Illuminate/Foundation/Console/CastMakeCommand.php
index 2704360611d7..df8abb377c53 100644
--- a/src/Illuminate/Foundation/Console/CastMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/CastMakeCommand.php
@@ -21,7 +21,7 @@ class CastMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ChannelMakeCommand.php b/src/Illuminate/Foundation/Console/ChannelMakeCommand.php
index 1bc26e85da95..8e95d9ea872f 100644
--- a/src/Illuminate/Foundation/Console/ChannelMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ChannelMakeCommand.php
@@ -21,7 +21,7 @@ class ChannelMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ClearCompiledCommand.php b/src/Illuminate/Foundation/Console/ClearCompiledCommand.php
index 20375ded17a6..267b2cf60ebb 100644
--- a/src/Illuminate/Foundation/Console/ClearCompiledCommand.php
+++ b/src/Illuminate/Foundation/Console/ClearCompiledCommand.php
@@ -20,7 +20,7 @@ class ClearCompiledCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ComponentMakeCommand.php b/src/Illuminate/Foundation/Console/ComponentMakeCommand.php
index e11838c2fb40..44dda9df1ec5 100644
--- a/src/Illuminate/Foundation/Console/ComponentMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ComponentMakeCommand.php
@@ -23,7 +23,7 @@ class ComponentMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ConfigCacheCommand.php b/src/Illuminate/Foundation/Console/ConfigCacheCommand.php
index 18eec46c0f5c..b6926fcd3458 100644
--- a/src/Illuminate/Foundation/Console/ConfigCacheCommand.php
+++ b/src/Illuminate/Foundation/Console/ConfigCacheCommand.php
@@ -24,7 +24,7 @@ class ConfigCacheCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ConfigClearCommand.php b/src/Illuminate/Foundation/Console/ConfigClearCommand.php
index 3e07e9be9a4a..80b70fc2a25c 100644
--- a/src/Illuminate/Foundation/Console/ConfigClearCommand.php
+++ b/src/Illuminate/Foundation/Console/ConfigClearCommand.php
@@ -21,7 +21,7 @@ class ConfigClearCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ConsoleMakeCommand.php b/src/Illuminate/Foundation/Console/ConsoleMakeCommand.php
index 18f6dd1b7d94..829c8653ce71 100644
--- a/src/Illuminate/Foundation/Console/ConsoleMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ConsoleMakeCommand.php
@@ -25,7 +25,7 @@ class ConsoleMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/DocsCommand.php b/src/Illuminate/Foundation/Console/DocsCommand.php
index e8e1646f4d46..4229afe0e222 100644
--- a/src/Illuminate/Foundation/Console/DocsCommand.php
+++ b/src/Illuminate/Foundation/Console/DocsCommand.php
@@ -31,7 +31,7 @@ class DocsCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
@@ -75,7 +75,7 @@ class DocsCommand extends Command
     /**
      * The custom documentation version to open.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $version;
 
diff --git a/src/Illuminate/Foundation/Console/DownCommand.php b/src/Illuminate/Foundation/Console/DownCommand.php
index 42aa6b6487c6..17a440d7c449 100644
--- a/src/Illuminate/Foundation/Console/DownCommand.php
+++ b/src/Illuminate/Foundation/Console/DownCommand.php
@@ -30,7 +30,7 @@ class DownCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EnvironmentCommand.php b/src/Illuminate/Foundation/Console/EnvironmentCommand.php
index ba74ed987efc..978e81182aee 100644
--- a/src/Illuminate/Foundation/Console/EnvironmentCommand.php
+++ b/src/Illuminate/Foundation/Console/EnvironmentCommand.php
@@ -20,7 +20,7 @@ class EnvironmentCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EnvironmentDecryptCommand.php b/src/Illuminate/Foundation/Console/EnvironmentDecryptCommand.php
index 1e11e1100f6d..784a5a73b082 100644
--- a/src/Illuminate/Foundation/Console/EnvironmentDecryptCommand.php
+++ b/src/Illuminate/Foundation/Console/EnvironmentDecryptCommand.php
@@ -31,7 +31,7 @@ class EnvironmentDecryptCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EnvironmentEncryptCommand.php b/src/Illuminate/Foundation/Console/EnvironmentEncryptCommand.php
index ef9082629087..70cdbd344279 100644
--- a/src/Illuminate/Foundation/Console/EnvironmentEncryptCommand.php
+++ b/src/Illuminate/Foundation/Console/EnvironmentEncryptCommand.php
@@ -28,7 +28,7 @@ class EnvironmentEncryptCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EventCacheCommand.php b/src/Illuminate/Foundation/Console/EventCacheCommand.php
index df42fbfd1d65..5b72f41300e4 100644
--- a/src/Illuminate/Foundation/Console/EventCacheCommand.php
+++ b/src/Illuminate/Foundation/Console/EventCacheCommand.php
@@ -21,7 +21,7 @@ class EventCacheCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EventClearCommand.php b/src/Illuminate/Foundation/Console/EventClearCommand.php
index a5c8ed1937bb..24d889f39ee2 100644
--- a/src/Illuminate/Foundation/Console/EventClearCommand.php
+++ b/src/Illuminate/Foundation/Console/EventClearCommand.php
@@ -21,7 +21,7 @@ class EventClearCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EventGenerateCommand.php b/src/Illuminate/Foundation/Console/EventGenerateCommand.php
index b27e9dbb0c82..90035259ae62 100644
--- a/src/Illuminate/Foundation/Console/EventGenerateCommand.php
+++ b/src/Illuminate/Foundation/Console/EventGenerateCommand.php
@@ -21,7 +21,7 @@ class EventGenerateCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EventListCommand.php b/src/Illuminate/Foundation/Console/EventListCommand.php
index 1e0e11b877c8..953563955987 100644
--- a/src/Illuminate/Foundation/Console/EventListCommand.php
+++ b/src/Illuminate/Foundation/Console/EventListCommand.php
@@ -24,7 +24,7 @@ class EventListCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/EventMakeCommand.php b/src/Illuminate/Foundation/Console/EventMakeCommand.php
index 94f96b5ef347..1644b9294a70 100644
--- a/src/Illuminate/Foundation/Console/EventMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/EventMakeCommand.php
@@ -21,7 +21,7 @@ class EventMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ExceptionMakeCommand.php b/src/Illuminate/Foundation/Console/ExceptionMakeCommand.php
index 54b24d6f2eb7..3eac8506b97a 100644
--- a/src/Illuminate/Foundation/Console/ExceptionMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ExceptionMakeCommand.php
@@ -21,7 +21,7 @@ class ExceptionMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/JobMakeCommand.php b/src/Illuminate/Foundation/Console/JobMakeCommand.php
index 901fff210b1a..46585ced9edc 100644
--- a/src/Illuminate/Foundation/Console/JobMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/JobMakeCommand.php
@@ -24,7 +24,7 @@ class JobMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/KeyGenerateCommand.php b/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
index f047bc39aed6..fe95769a224e 100644
--- a/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
+++ b/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
@@ -26,7 +26,7 @@ class KeyGenerateCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ListenerMakeCommand.php b/src/Illuminate/Foundation/Console/ListenerMakeCommand.php
index c5c704240570..d1b04f8c0408 100644
--- a/src/Illuminate/Foundation/Console/ListenerMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ListenerMakeCommand.php
@@ -25,7 +25,7 @@ class ListenerMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/MailMakeCommand.php b/src/Illuminate/Foundation/Console/MailMakeCommand.php
index fe0982933854..c0b9becc9130 100644
--- a/src/Illuminate/Foundation/Console/MailMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/MailMakeCommand.php
@@ -25,7 +25,7 @@ class MailMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ModelMakeCommand.php b/src/Illuminate/Foundation/Console/ModelMakeCommand.php
index c448a061b79a..658e112bab13 100644
--- a/src/Illuminate/Foundation/Console/ModelMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ModelMakeCommand.php
@@ -25,7 +25,7 @@ class ModelMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/NotificationMakeCommand.php b/src/Illuminate/Foundation/Console/NotificationMakeCommand.php
index 4bcf5c840faa..dd5843b39d68 100644
--- a/src/Illuminate/Foundation/Console/NotificationMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/NotificationMakeCommand.php
@@ -24,7 +24,7 @@ class NotificationMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ObserverMakeCommand.php b/src/Illuminate/Foundation/Console/ObserverMakeCommand.php
index 1187269daff8..0a12c689e278 100644
--- a/src/Illuminate/Foundation/Console/ObserverMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ObserverMakeCommand.php
@@ -22,7 +22,7 @@ class ObserverMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/OptimizeClearCommand.php b/src/Illuminate/Foundation/Console/OptimizeClearCommand.php
index d3b039ebb36b..561614b12e5e 100644
--- a/src/Illuminate/Foundation/Console/OptimizeClearCommand.php
+++ b/src/Illuminate/Foundation/Console/OptimizeClearCommand.php
@@ -20,7 +20,7 @@ class OptimizeClearCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/OptimizeCommand.php b/src/Illuminate/Foundation/Console/OptimizeCommand.php
index b487928d43ba..922e5effed9c 100644
--- a/src/Illuminate/Foundation/Console/OptimizeCommand.php
+++ b/src/Illuminate/Foundation/Console/OptimizeCommand.php
@@ -20,7 +20,7 @@ class OptimizeCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php b/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php
index d9b928f4ad4a..3933814d7518 100644
--- a/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php
+++ b/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php
@@ -21,7 +21,7 @@ class PackageDiscoverCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/PolicyMakeCommand.php b/src/Illuminate/Foundation/Console/PolicyMakeCommand.php
index 4c895f633729..0c2dae476e9b 100644
--- a/src/Illuminate/Foundation/Console/PolicyMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/PolicyMakeCommand.php
@@ -23,7 +23,7 @@ class PolicyMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
@@ -84,7 +84,7 @@ protected function replaceUserNamespace($stub)
     /**
      * Get the model for the guard's user provider.
      *
-     * @return string|null
+     * @return ?string
      *
      * @throws \LogicException
      */
diff --git a/src/Illuminate/Foundation/Console/ProviderMakeCommand.php b/src/Illuminate/Foundation/Console/ProviderMakeCommand.php
index a3b99d975fa0..53800382d206 100644
--- a/src/Illuminate/Foundation/Console/ProviderMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ProviderMakeCommand.php
@@ -21,7 +21,7 @@ class ProviderMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/RequestMakeCommand.php b/src/Illuminate/Foundation/Console/RequestMakeCommand.php
index f181ff0c8fe7..77c0a4c072ab 100644
--- a/src/Illuminate/Foundation/Console/RequestMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/RequestMakeCommand.php
@@ -21,7 +21,7 @@ class RequestMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ResourceMakeCommand.php b/src/Illuminate/Foundation/Console/ResourceMakeCommand.php
index 9fe4fddbcb6d..5569981d6ccf 100644
--- a/src/Illuminate/Foundation/Console/ResourceMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ResourceMakeCommand.php
@@ -21,7 +21,7 @@ class ResourceMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/RouteCacheCommand.php b/src/Illuminate/Foundation/Console/RouteCacheCommand.php
index 00f4050c4572..18d2afff6e8b 100644
--- a/src/Illuminate/Foundation/Console/RouteCacheCommand.php
+++ b/src/Illuminate/Foundation/Console/RouteCacheCommand.php
@@ -23,7 +23,7 @@ class RouteCacheCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/RouteClearCommand.php b/src/Illuminate/Foundation/Console/RouteClearCommand.php
index da45e6d80f1c..911b136ea88d 100644
--- a/src/Illuminate/Foundation/Console/RouteClearCommand.php
+++ b/src/Illuminate/Foundation/Console/RouteClearCommand.php
@@ -21,7 +21,7 @@ class RouteClearCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/RouteListCommand.php b/src/Illuminate/Foundation/Console/RouteListCommand.php
index caa81652cea9..a21c277d680f 100644
--- a/src/Illuminate/Foundation/Console/RouteListCommand.php
+++ b/src/Illuminate/Foundation/Console/RouteListCommand.php
@@ -31,7 +31,7 @@ class RouteListCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/RuleMakeCommand.php b/src/Illuminate/Foundation/Console/RuleMakeCommand.php
index 5cefd1fa1564..11724a26abdd 100644
--- a/src/Illuminate/Foundation/Console/RuleMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/RuleMakeCommand.php
@@ -21,7 +21,7 @@ class RuleMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ScopeMakeCommand.php b/src/Illuminate/Foundation/Console/ScopeMakeCommand.php
index d36742c83c34..bc5f3dfb8670 100644
--- a/src/Illuminate/Foundation/Console/ScopeMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ScopeMakeCommand.php
@@ -21,7 +21,7 @@ class ScopeMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ServeCommand.php b/src/Illuminate/Foundation/Console/ServeCommand.php
index 67321fd79fe5..adf26fefcb53 100644
--- a/src/Illuminate/Foundation/Console/ServeCommand.php
+++ b/src/Illuminate/Foundation/Console/ServeCommand.php
@@ -26,7 +26,7 @@ class ServeCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ShowModelCommand.php b/src/Illuminate/Foundation/Console/ShowModelCommand.php
index 5b15aafc85a2..61a4b31e6389 100644
--- a/src/Illuminate/Foundation/Console/ShowModelCommand.php
+++ b/src/Illuminate/Foundation/Console/ShowModelCommand.php
@@ -34,7 +34,7 @@ class ShowModelCommand extends DatabaseInspectionCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
@@ -410,7 +410,7 @@ protected function displayCli($class, $database, $table, $policy, $attributes, $
      *
      * @param  string  $column
      * @param  \Illuminate\Database\Eloquent\Model  $model
-     * @return string|null
+     * @return ?string
      */
     protected function getCastType($column, $model)
     {
diff --git a/src/Illuminate/Foundation/Console/StorageLinkCommand.php b/src/Illuminate/Foundation/Console/StorageLinkCommand.php
index 10427557bff9..022b71ed86b2 100644
--- a/src/Illuminate/Foundation/Console/StorageLinkCommand.php
+++ b/src/Illuminate/Foundation/Console/StorageLinkCommand.php
@@ -22,7 +22,7 @@ class StorageLinkCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/StubPublishCommand.php b/src/Illuminate/Foundation/Console/StubPublishCommand.php
index a1790828233c..f9c1280ae187 100644
--- a/src/Illuminate/Foundation/Console/StubPublishCommand.php
+++ b/src/Illuminate/Foundation/Console/StubPublishCommand.php
@@ -24,7 +24,7 @@ class StubPublishCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/TestMakeCommand.php b/src/Illuminate/Foundation/Console/TestMakeCommand.php
index ae8bcf2ac09e..d581a30234b2 100644
--- a/src/Illuminate/Foundation/Console/TestMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/TestMakeCommand.php
@@ -22,7 +22,7 @@ class TestMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/UpCommand.php b/src/Illuminate/Foundation/Console/UpCommand.php
index 000d3c625907..ee9f394440f4 100644
--- a/src/Illuminate/Foundation/Console/UpCommand.php
+++ b/src/Illuminate/Foundation/Console/UpCommand.php
@@ -22,7 +22,7 @@ class UpCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/VendorPublishCommand.php b/src/Illuminate/Foundation/Console/VendorPublishCommand.php
index ad41fa772872..e13ad88b30fb 100644
--- a/src/Illuminate/Foundation/Console/VendorPublishCommand.php
+++ b/src/Illuminate/Foundation/Console/VendorPublishCommand.php
@@ -56,7 +56,7 @@ class VendorPublishCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ViewCacheCommand.php b/src/Illuminate/Foundation/Console/ViewCacheCommand.php
index 03f8d75d9a39..88a6cfef32f3 100644
--- a/src/Illuminate/Foundation/Console/ViewCacheCommand.php
+++ b/src/Illuminate/Foundation/Console/ViewCacheCommand.php
@@ -24,7 +24,7 @@ class ViewCacheCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/Console/ViewClearCommand.php b/src/Illuminate/Foundation/Console/ViewClearCommand.php
index 2480f965fff9..f6c0f3cfdf1d 100644
--- a/src/Illuminate/Foundation/Console/ViewClearCommand.php
+++ b/src/Illuminate/Foundation/Console/ViewClearCommand.php
@@ -22,7 +22,7 @@ class ViewClearCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Foundation/EnvironmentDetector.php b/src/Illuminate/Foundation/EnvironmentDetector.php
index b2747bc6800e..d28f32505135 100644
--- a/src/Illuminate/Foundation/EnvironmentDetector.php
+++ b/src/Illuminate/Foundation/EnvironmentDetector.php
@@ -56,7 +56,7 @@ protected function detectConsoleEnvironment(Closure $callback, array $args)
      * Get the environment argument from the console.
      *
      * @param  array  $args
-     * @return string|null
+     * @return ?string
      */
     protected function getEnvironmentArgument(array $args)
     {
diff --git a/src/Illuminate/Foundation/Exceptions/Handler.php b/src/Illuminate/Foundation/Exceptions/Handler.php
index 40a4dc4cbda0..deccdeefb3f6 100644
--- a/src/Illuminate/Foundation/Exceptions/Handler.php
+++ b/src/Illuminate/Foundation/Exceptions/Handler.php
@@ -646,7 +646,7 @@ protected function registerErrorViewPaths()
      * Get the view used to render HTTP exceptions.
      *
      * @param  \Symfony\Component\HttpKernel\Exception\HttpExceptionInterface  $e
-     * @return string|null
+     * @return ?string
      */
     protected function getHttpExceptionView(HttpExceptionInterface $e)
     {
diff --git a/src/Illuminate/Foundation/Http/Exceptions/MaintenanceModeException.php b/src/Illuminate/Foundation/Http/Exceptions/MaintenanceModeException.php
index 5553fde625d2..388ca87d65e9 100644
--- a/src/Illuminate/Foundation/Http/Exceptions/MaintenanceModeException.php
+++ b/src/Illuminate/Foundation/Http/Exceptions/MaintenanceModeException.php
@@ -38,7 +38,7 @@ class MaintenanceModeException extends ServiceUnavailableHttpException
      *
      * @param  int  $time
      * @param  int|null  $retryAfter
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  \Throwable|null  $previous
      * @param  int  $code
      * @return void
diff --git a/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php b/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php
index bb9595fcfcff..932e0679ff28 100644
--- a/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php
+++ b/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php
@@ -146,7 +146,7 @@ protected function tokensMatch($request)
      * Get the CSRF token from the request.
      *
      * @param  \Illuminate\Http\Request  $request
-     * @return string|null
+     * @return ?string
      */
     protected function getTokenFromRequest($request)
     {
diff --git a/src/Illuminate/Foundation/PackageManifest.php b/src/Illuminate/Foundation/PackageManifest.php
index 9767feb99f22..9599e3b97659 100644
--- a/src/Illuminate/Foundation/PackageManifest.php
+++ b/src/Illuminate/Foundation/PackageManifest.php
@@ -32,7 +32,7 @@ class PackageManifest
     /**
      * The manifest path.
      *
-     * @var string|null
+     * @var ?string
      */
     public $manifestPath;
 
diff --git a/src/Illuminate/Foundation/Support/Providers/RouteServiceProvider.php b/src/Illuminate/Foundation/Support/Providers/RouteServiceProvider.php
index c8679e51ede6..68d1c26b421c 100644
--- a/src/Illuminate/Foundation/Support/Providers/RouteServiceProvider.php
+++ b/src/Illuminate/Foundation/Support/Providers/RouteServiceProvider.php
@@ -18,7 +18,7 @@ class RouteServiceProvider extends ServiceProvider
     /**
      * The controller namespace for the application.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $namespace;
 
diff --git a/src/Illuminate/Foundation/Testing/Concerns/InteractsWithAuthentication.php b/src/Illuminate/Foundation/Testing/Concerns/InteractsWithAuthentication.php
index 9e8c0f5870b6..168978b6b4ff 100644
--- a/src/Illuminate/Foundation/Testing/Concerns/InteractsWithAuthentication.php
+++ b/src/Illuminate/Foundation/Testing/Concerns/InteractsWithAuthentication.php
@@ -10,7 +10,7 @@ trait InteractsWithAuthentication
      * Set the currently logged in user for the application.
      *
      * @param  \Illuminate\Contracts\Auth\Authenticatable  $user
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return $this
      */
     public function actingAs(UserContract $user, $guard = null)
@@ -22,7 +22,7 @@ public function actingAs(UserContract $user, $guard = null)
      * Set the currently logged in user for the application.
      *
      * @param  \Illuminate\Contracts\Auth\Authenticatable  $user
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return $this
      */
     public function be(UserContract $user, $guard = null)
@@ -41,7 +41,7 @@ public function be(UserContract $user, $guard = null)
     /**
      * Assert that the user is authenticated.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return $this
      */
     public function assertAuthenticated($guard = null)
@@ -54,7 +54,7 @@ public function assertAuthenticated($guard = null)
     /**
      * Assert that the user is not authenticated.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return $this
      */
     public function assertGuest($guard = null)
@@ -67,7 +67,7 @@ public function assertGuest($guard = null)
     /**
      * Return true if the user is authenticated, false otherwise.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return bool
      */
     protected function isAuthenticated($guard = null)
@@ -79,7 +79,7 @@ protected function isAuthenticated($guard = null)
      * Assert that the user is authenticated as the given user.
      *
      * @param  \Illuminate\Contracts\Auth\Authenticatable  $user
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return $this
      */
     public function assertAuthenticatedAs($user, $guard = null)
@@ -105,7 +105,7 @@ public function assertAuthenticatedAs($user, $guard = null)
      * Assert that the given credentials are valid.
      *
      * @param  array  $credentials
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return $this
      */
     public function assertCredentials(array $credentials, $guard = null)
@@ -121,7 +121,7 @@ public function assertCredentials(array $credentials, $guard = null)
      * Assert that the given credentials are invalid.
      *
      * @param  array  $credentials
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return $this
      */
     public function assertInvalidCredentials(array $credentials, $guard = null)
@@ -137,7 +137,7 @@ public function assertInvalidCredentials(array $credentials, $guard = null)
      * Return true if the credentials are valid, false otherwise.
      *
      * @param  array  $credentials
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return bool
      */
     protected function hasCredentials(array $credentials, $guard = null)
diff --git a/src/Illuminate/Foundation/Testing/Concerns/InteractsWithDatabase.php b/src/Illuminate/Foundation/Testing/Concerns/InteractsWithDatabase.php
index c45f0f9c67c2..c7df31d498f3 100644
--- a/src/Illuminate/Foundation/Testing/Concerns/InteractsWithDatabase.php
+++ b/src/Illuminate/Foundation/Testing/Concerns/InteractsWithDatabase.php
@@ -20,7 +20,7 @@ trait InteractsWithDatabase
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $table
      * @param  array  $data
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     protected function assertDatabaseHas($table, array $data, $connection = null)
@@ -37,7 +37,7 @@ protected function assertDatabaseHas($table, array $data, $connection = null)
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $table
      * @param  array  $data
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     protected function assertDatabaseMissing($table, array $data, $connection = null)
@@ -56,7 +56,7 @@ protected function assertDatabaseMissing($table, array $data, $connection = null
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $table
      * @param  int  $count
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     protected function assertDatabaseCount($table, int $count, $connection = null)
@@ -72,7 +72,7 @@ protected function assertDatabaseCount($table, int $count, $connection = null)
      * Assert that the given table has no entries.
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $table
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return $this
      */
     protected function assertDatabaseEmpty($table, $connection = null)
@@ -89,8 +89,8 @@ protected function assertDatabaseEmpty($table, $connection = null)
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $table
      * @param  array  $data
-     * @param  string|null  $connection
-     * @param  string|null  $deletedAtColumn
+     * @param  ?string  $connection
+     * @param  ?string  $deletedAtColumn
      * @return $this
      */
     protected function assertSoftDeleted($table, array $data = [], $connection = null, $deletedAtColumn = 'deleted_at')
@@ -116,8 +116,8 @@ protected function assertSoftDeleted($table, array $data = [], $connection = nul
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $table
      * @param  array  $data
-     * @param  string|null  $connection
-     * @param  string|null  $deletedAtColumn
+     * @param  ?string  $connection
+     * @param  ?string  $deletedAtColumn
      * @return $this
      */
     protected function assertNotSoftDeleted($table, array $data = [], $connection = null, $deletedAtColumn = 'deleted_at')
@@ -204,8 +204,8 @@ public function castAsJson($value)
     /**
      * Get the database connection.
      *
-     * @param  string|null  $connection
-     * @param  string|null  $table
+     * @param  ?string  $connection
+     * @param  ?string  $table
      * @return \Illuminate\Database\Connection
      */
     protected function getConnection($connection = null, $table = null)
@@ -232,7 +232,7 @@ protected function getTable($table)
      * Get the table connection specified in the given model.
      *
      * @param  \Illuminate\Database\Eloquent\Model|string  $table
-     * @return string|null
+     * @return ?string
      */
     protected function getTableConnection($table)
     {
diff --git a/src/Illuminate/Foundation/Testing/Concerns/InteractsWithExceptionHandling.php b/src/Illuminate/Foundation/Testing/Concerns/InteractsWithExceptionHandling.php
index 0955682430b8..8b5928be0d54 100644
--- a/src/Illuminate/Foundation/Testing/Concerns/InteractsWithExceptionHandling.php
+++ b/src/Illuminate/Foundation/Testing/Concerns/InteractsWithExceptionHandling.php
@@ -155,7 +155,7 @@ public function renderForConsole($output, Throwable $e)
      *
      * @param  \Closure  $test
      * @param  class-string<\Throwable>  $expectedClass
-     * @param  string|null  $expectedMessage
+     * @param  ?string  $expectedMessage
      * @return $this
      */
     protected function assertThrows(Closure $test, string $expectedClass = Throwable::class, ?string $expectedMessage = null)
diff --git a/src/Illuminate/Foundation/Testing/Concerns/MakesHttpRequests.php b/src/Illuminate/Foundation/Testing/Concerns/MakesHttpRequests.php
index ca310e60ce7e..fa8f3f9aa9f2 100644
--- a/src/Illuminate/Foundation/Testing/Concerns/MakesHttpRequests.php
+++ b/src/Illuminate/Foundation/Testing/Concerns/MakesHttpRequests.php
@@ -539,7 +539,7 @@ public function json($method, $uri, array $data = [], array $headers = [])
      * @param  array  $cookies
      * @param  array  $files
      * @param  array  $server
-     * @param  string|null  $content
+     * @param  ?string  $content
      * @return \Illuminate\Testing\TestResponse
      */
     public function call($method, $uri, $parameters = [], $cookies = [], $files = [], $server = [], $content = null)
diff --git a/src/Illuminate/Foundation/Testing/WithFaker.php b/src/Illuminate/Foundation/Testing/WithFaker.php
index 202a63e8c43b..6190641d5562 100644
--- a/src/Illuminate/Foundation/Testing/WithFaker.php
+++ b/src/Illuminate/Foundation/Testing/WithFaker.php
@@ -27,7 +27,7 @@ protected function setUpFaker()
     /**
      * Get the default Faker instance for a given locale.
      *
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return \Faker\Generator
      */
     protected function faker($locale = null)
@@ -38,7 +38,7 @@ protected function faker($locale = null)
     /**
      * Create a Faker instance for the given locale.
      *
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return \Faker\Generator
      */
     protected function makeFaker($locale = null)
diff --git a/src/Illuminate/Foundation/Vite.php b/src/Illuminate/Foundation/Vite.php
index a14ef52589c2..cfcce81c27b7 100644
--- a/src/Illuminate/Foundation/Vite.php
+++ b/src/Illuminate/Foundation/Vite.php
@@ -16,7 +16,7 @@ class Vite implements Htmlable
     /**
      * The Content Security Policy nonce to apply to all generated tags.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $nonce;
 
@@ -37,7 +37,7 @@ class Vite implements Htmlable
     /**
      * The path to the "hot" file.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $hotFile;
 
@@ -103,7 +103,7 @@ public function preloadedAssets()
     /**
      * Get the Content Security Policy nonce applied to all generated tags.
      *
-     * @return string|null
+     * @return ?string
      */
     public function cspNonce()
     {
@@ -251,7 +251,7 @@ public function usePreloadTagAttributes($attributes)
      * Generate Vite tags for an entrypoint.
      *
      * @param  string|string[]  $entrypoints
-     * @param  string|null  $buildDirectory
+     * @param  ?string  $buildDirectory
      * @return \Illuminate\Support\HtmlString
      *
      * @throws \Exception
@@ -639,7 +639,7 @@ protected function hotAsset($asset)
      * Get the URL for an asset.
      *
      * @param  string  $asset
-     * @param  string|null  $buildDirectory
+     * @param  ?string  $buildDirectory
      * @return string
      */
     public function asset($asset, $buildDirectory = null)
@@ -704,8 +704,8 @@ protected function manifestPath($buildDirectory)
     /**
      * Get a unique hash representing the current manifest, or null if there is no manifest.
      *
-     * @param  string|null  $buildDirectory
-     * @return string|null
+     * @param  ?string  $buildDirectory
+     * @return ?string
      */
     public function manifestHash($buildDirectory = null)
     {
diff --git a/src/Illuminate/Foundation/helpers.php b/src/Illuminate/Foundation/helpers.php
index 4b017433fe21..da8d4b33cf13 100644
--- a/src/Illuminate/Foundation/helpers.php
+++ b/src/Illuminate/Foundation/helpers.php
@@ -107,7 +107,7 @@ function action($name, $parameters = [], $absolute = true)
     /**
      * Get the available container instance.
      *
-     * @param  string|null  $abstract
+     * @param  ?string  $abstract
      * @param  array  $parameters
      * @return mixed|\Illuminate\Contracts\Foundation\Application
      */
@@ -152,7 +152,7 @@ function asset($path, $secure = null)
     /**
      * Get the available auth instance.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return \Illuminate\Contracts\Auth\Factory|\Illuminate\Contracts\Auth\Guard|\Illuminate\Contracts\Auth\StatefulGuard
      */
     function auth($guard = null)
@@ -294,15 +294,15 @@ function config_path($path = '')
     /**
      * Create a new cookie instance.
      *
-     * @param  string|null  $name
-     * @param  string|null  $value
+     * @param  ?string  $name
+     * @param  ?string  $value
      * @param  int  $minutes
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @param  bool|null  $secure
      * @param  bool  $httpOnly
      * @param  bool  $raw
-     * @param  string|null  $sameSite
+     * @param  ?string  $sameSite
      * @return \Illuminate\Cookie\CookieJar|\Symfony\Component\HttpFoundation\Cookie
      */
     function cookie($name = null, $value = null, $minutes = 0, $path = null, $domain = null, $secure = null, $httpOnly = true, $raw = false, $sameSite = null)
@@ -495,7 +495,7 @@ function info($message, $context = [])
     /**
      * Log a debug message to the logs.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @param  array  $context
      * @return \Illuminate\Log\LogManager|null
      */
@@ -526,7 +526,7 @@ function lang_path($path = '')
     /**
      * Get a log driver instance.
      *
-     * @param  string|null  $driver
+     * @param  ?string  $driver
      * @return \Illuminate\Log\LogManager|\Psr\Log\LoggerInterface
      */
     function logs($driver = null)
@@ -581,7 +581,7 @@ function now($tz = null)
     /**
      * Retrieve an old input item.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed
      */
@@ -652,7 +652,7 @@ function public_path($path = '')
     /**
      * Get an instance of the redirector.
      *
-     * @param  string|null  $to
+     * @param  ?string  $to
      * @param  int  $status
      * @param  array  $headers
      * @param  bool|null  $secure
@@ -924,9 +924,9 @@ function today($tz = null)
     /**
      * Translate the given message.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return \Illuminate\Contracts\Translation\Translator|string|array|null
      */
     function trans($key = null, $replace = [], $locale = null)
@@ -946,7 +946,7 @@ function trans($key = null, $replace = [], $locale = null)
      * @param  string  $key
      * @param  \Countable|int|array  $number
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return string
      */
     function trans_choice($key, $number, array $replace = [], $locale = null)
@@ -959,9 +959,9 @@ function trans_choice($key, $number, array $replace = [], $locale = null)
     /**
      * Translate the given message.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return string|array|null
      */
     function __($key = null, $replace = [], $locale = null)
@@ -978,7 +978,7 @@ function __($key = null, $replace = [], $locale = null)
     /**
      * Generate a url for the application.
      *
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @param  mixed  $parameters
      * @param  bool|null  $secure
      * @return \Illuminate\Contracts\Routing\UrlGenerator|string
@@ -1019,7 +1019,7 @@ function validator(array $data = [], array $rules = [], array $messages = [], ar
     /**
      * Get the evaluated view contents for the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  \Illuminate\Contracts\Support\Arrayable|array  $data
      * @param  array  $mergeData
      * @return \Illuminate\Contracts\View\View|\Illuminate\Contracts\View\Factory
diff --git a/src/Illuminate/Hashing/AbstractHasher.php b/src/Illuminate/Hashing/AbstractHasher.php
index f10371290b1d..b77949745cf3 100644
--- a/src/Illuminate/Hashing/AbstractHasher.php
+++ b/src/Illuminate/Hashing/AbstractHasher.php
@@ -19,7 +19,7 @@ public function info($hashedValue)
      * Check the given plain value against a hash.
      *
      * @param  string  $value
-     * @param  string|null  $hashedValue
+     * @param  ?string  $hashedValue
      * @param  array  $options
      * @return bool
      */
diff --git a/src/Illuminate/Hashing/Argon2IdHasher.php b/src/Illuminate/Hashing/Argon2IdHasher.php
index 9aca47ac9c71..7a48dcd3a871 100644
--- a/src/Illuminate/Hashing/Argon2IdHasher.php
+++ b/src/Illuminate/Hashing/Argon2IdHasher.php
@@ -10,7 +10,7 @@ class Argon2IdHasher extends ArgonHasher
      * Check the given plain value against a hash.
      *
      * @param  string  $value
-     * @param  string|null  $hashedValue
+     * @param  ?string  $hashedValue
      * @param  array  $options
      * @return bool
      *
diff --git a/src/Illuminate/Http/Client/PendingRequest.php b/src/Illuminate/Http/Client/PendingRequest.php
index 2d03204b9996..32bc631953c8 100644
--- a/src/Illuminate/Http/Client/PendingRequest.php
+++ b/src/Illuminate/Http/Client/PendingRequest.php
@@ -286,7 +286,7 @@ public function asForm()
      *
      * @param  string|array  $name
      * @param  string|resource  $contents
-     * @param  string|null  $filename
+     * @param  ?string  $filename
      * @param  array  $headers
      * @return $this
      */
diff --git a/src/Illuminate/Http/Client/Request.php b/src/Illuminate/Http/Client/Request.php
index 3c2d6a9bdb19..662ab68db285 100644
--- a/src/Illuminate/Http/Client/Request.php
+++ b/src/Illuminate/Http/Client/Request.php
@@ -136,8 +136,8 @@ public function body()
      * Determine if the request contains the given file.
      *
      * @param  string  $name
-     * @param  string|null  $value
-     * @param  string|null  $filename
+     * @param  ?string  $value
+     * @param  ?string  $filename
      * @return bool
      */
     public function hasFile($name, $value = null, $filename = null)
diff --git a/src/Illuminate/Http/Client/Response.php b/src/Illuminate/Http/Client/Response.php
index cc9bfd6bb9ab..31a5c687cb29 100644
--- a/src/Illuminate/Http/Client/Response.php
+++ b/src/Illuminate/Http/Client/Response.php
@@ -65,7 +65,7 @@ public function body()
     /**
      * Get the JSON decoded body of the response as an array or scalar value.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed
      */
@@ -95,7 +95,7 @@ public function object()
     /**
      * Get the JSON decoded body of the response as a collection.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return \Illuminate\Support\Collection
      */
     public function collect($key = null)
diff --git a/src/Illuminate/Http/Concerns/InteractsWithContentTypes.php b/src/Illuminate/Http/Concerns/InteractsWithContentTypes.php
index 0d5f62fc7532..10dff7874735 100644
--- a/src/Illuminate/Http/Concerns/InteractsWithContentTypes.php
+++ b/src/Illuminate/Http/Concerns/InteractsWithContentTypes.php
@@ -77,7 +77,7 @@ public function accepts($contentTypes)
      * Return the most suitable content type from the given array based on content negotiation.
      *
      * @param  string|array  $contentTypes
-     * @return string|null
+     * @return ?string
      */
     public function prefers($contentTypes)
     {
diff --git a/src/Illuminate/Http/Concerns/InteractsWithFlashData.php b/src/Illuminate/Http/Concerns/InteractsWithFlashData.php
index a7dfa1c8d761..fdace176a4b0 100644
--- a/src/Illuminate/Http/Concerns/InteractsWithFlashData.php
+++ b/src/Illuminate/Http/Concerns/InteractsWithFlashData.php
@@ -9,7 +9,7 @@ trait InteractsWithFlashData
     /**
      * Retrieve an old input item.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  \Illuminate\Database\Eloquent\Model|string|array|null  $default
      * @return string|array|null
      */
diff --git a/src/Illuminate/Http/Concerns/InteractsWithInput.php b/src/Illuminate/Http/Concerns/InteractsWithInput.php
index 835753113cd0..d62884013432 100644
--- a/src/Illuminate/Http/Concerns/InteractsWithInput.php
+++ b/src/Illuminate/Http/Concerns/InteractsWithInput.php
@@ -15,7 +15,7 @@ trait InteractsWithInput
     /**
      * Retrieve a server variable from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  string|array|null  $default
      * @return string|array|null
      */
@@ -38,7 +38,7 @@ public function hasHeader($key)
     /**
      * Retrieve a header from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  string|array|null  $default
      * @return string|array|null
      */
@@ -50,7 +50,7 @@ public function header($key = null, $default = null)
     /**
      * Get the bearer token from the request headers.
      *
-     * @return string|null
+     * @return ?string
      */
     public function bearerToken()
     {
@@ -294,7 +294,7 @@ public function all($keys = null)
     /**
      * Retrieve an input item from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed
      */
@@ -334,7 +334,7 @@ public function string($key, $default = null)
      *
      * Returns true when value is "1", "true", "on", and "yes". Otherwise, returns false.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  bool  $default
      * @return bool
      */
@@ -371,8 +371,8 @@ public function float($key, $default = 0.0)
      * Retrieve input from the request as a Carbon instance.
      *
      * @param  string  $key
-     * @param  string|null  $format
-     * @param  string|null  $tz
+     * @param  ?string  $format
+     * @param  ?string  $tz
      * @return \Illuminate\Support\Carbon|null
      *
      * @throws \Carbon\Exceptions\InvalidFormatException
@@ -467,7 +467,7 @@ public function except($keys)
     /**
      * Retrieve a query string item from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  string|array|null  $default
      * @return string|array|null
      */
@@ -479,7 +479,7 @@ public function query($key = null, $default = null)
     /**
      * Retrieve a request payload item from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  string|array|null  $default
      * @return string|array|null
      */
@@ -502,7 +502,7 @@ public function hasCookie($key)
     /**
      * Retrieve a cookie from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  string|array|null  $default
      * @return string|array|null
      */
@@ -577,7 +577,7 @@ protected function isValidFile($file)
     /**
      * Retrieve a file from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return \Illuminate\Http\UploadedFile|\Illuminate\Http\UploadedFile[]|array|null
      */
diff --git a/src/Illuminate/Http/FileHelpers.php b/src/Illuminate/Http/FileHelpers.php
index 36ed55bea213..803d95d2365e 100644
--- a/src/Illuminate/Http/FileHelpers.php
+++ b/src/Illuminate/Http/FileHelpers.php
@@ -36,7 +36,7 @@ public function extension()
     /**
      * Get a filename for the file.
      *
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @return string
      */
     public function hashName($path = null)
diff --git a/src/Illuminate/Http/JsonResponse.php b/src/Illuminate/Http/JsonResponse.php
index 6e2f51dfa3ce..f25012816392 100755
--- a/src/Illuminate/Http/JsonResponse.php
+++ b/src/Illuminate/Http/JsonResponse.php
@@ -45,7 +45,7 @@ public static function fromJsonString(?string $data = null, int $status = 200, a
     /**
      * Sets the JSONP callback.
      *
-     * @param  string|null  $callback
+     * @param  ?string  $callback
      * @return $this
      */
     public function withCallback($callback = null)
diff --git a/src/Illuminate/Http/Middleware/TrustHosts.php b/src/Illuminate/Http/Middleware/TrustHosts.php
index 00a5a44c2e92..73acf7a6d571 100644
--- a/src/Illuminate/Http/Middleware/TrustHosts.php
+++ b/src/Illuminate/Http/Middleware/TrustHosts.php
@@ -62,7 +62,7 @@ protected function shouldSpecifyTrustedHosts()
     /**
      * Get a regular expression matching the application URL and all of its subdomains.
      *
-     * @return string|null
+     * @return ?string
      */
     protected function allSubdomainsOfApplicationUrl()
     {
diff --git a/src/Illuminate/Http/Request.php b/src/Illuminate/Http/Request.php
index a0255fc898eb..76edc56d27fa 100644
--- a/src/Illuminate/Http/Request.php
+++ b/src/Illuminate/Http/Request.php
@@ -180,8 +180,8 @@ public function decodedPath()
      * Get a segment from the URI (1 based index).
      *
      * @param  int  $index
-     * @param  string|null  $default
-     * @return string|null
+     * @param  ?string  $default
+     * @return ?string
      */
     public function segment($index, $default = null)
     {
@@ -313,7 +313,7 @@ public function secure()
     /**
      * Get the client IP address.
      *
-     * @return string|null
+     * @return ?string
      */
     public function ip()
     {
@@ -333,7 +333,7 @@ public function ips()
     /**
      * Get the client user agent.
      *
-     * @return string|null
+     * @return ?string
      */
     public function userAgent()
     {
@@ -396,7 +396,7 @@ public function get(string $key, mixed $default = null): mixed
     /**
      * Get the JSON payload for the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return \Symfony\Component\HttpFoundation\ParameterBag|mixed
      */
@@ -598,7 +598,7 @@ public function setDefaultRequestLocale(string $locale)
     /**
      * Get the user making the request.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return mixed
      */
     public function user($guard = null)
@@ -609,7 +609,7 @@ public function user($guard = null)
     /**
      * Get the route handling the request.
      *
-     * @param  string|null  $param
+     * @param  ?string  $param
      * @param  mixed  $default
      * @return \Illuminate\Routing\Route|object|string|null
      */
diff --git a/src/Illuminate/Http/Resources/CollectsResources.php b/src/Illuminate/Http/Resources/CollectsResources.php
index b84c34453908..bac5842b1dd6 100644
--- a/src/Illuminate/Http/Resources/CollectsResources.php
+++ b/src/Illuminate/Http/Resources/CollectsResources.php
@@ -43,7 +43,7 @@ protected function collectResource($resource)
     /**
      * Get the resource that this resource collects.
      *
-     * @return string|null
+     * @return ?string
      */
     protected function collects()
     {
diff --git a/src/Illuminate/Http/Resources/DelegatesToResource.php b/src/Illuminate/Http/Resources/DelegatesToResource.php
index e932646e19af..d1e85d3ffd46 100644
--- a/src/Illuminate/Http/Resources/DelegatesToResource.php
+++ b/src/Illuminate/Http/Resources/DelegatesToResource.php
@@ -36,7 +36,7 @@ public function getRouteKeyName()
      * Retrieve the model for a bound value.
      *
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return void
      *
      * @throws \Exception
@@ -51,7 +51,7 @@ public function resolveRouteBinding($value, $field = null)
      *
      * @param  string  $childType
      * @param  mixed  $value
-     * @param  string|null  $field
+     * @param  ?string  $field
      * @return void
      *
      * @throws \Exception
diff --git a/src/Illuminate/Http/Resources/Json/JsonResource.php b/src/Illuminate/Http/Resources/Json/JsonResource.php
index 62b75b154c24..0367ed9b3720 100644
--- a/src/Illuminate/Http/Resources/Json/JsonResource.php
+++ b/src/Illuminate/Http/Resources/Json/JsonResource.php
@@ -42,7 +42,7 @@ class JsonResource implements ArrayAccess, JsonSerializable, Responsable, UrlRou
     /**
      * The "data" wrapper that should be applied.
      *
-     * @var string|null
+     * @var ?string
      */
     public static $wrap = 'data';
 
diff --git a/src/Illuminate/Http/ResponseTrait.php b/src/Illuminate/Http/ResponseTrait.php
index cbe29dcc9902..8cbe2ccd92c3 100644
--- a/src/Illuminate/Http/ResponseTrait.php
+++ b/src/Illuminate/Http/ResponseTrait.php
@@ -130,8 +130,8 @@ public function withCookie($cookie)
      * Expire a cookie when sending the response.
      *
      * @param  \Symfony\Component\HttpFoundation\Cookie|mixed  $cookie
-     * @param  string|null  $path
-     * @param  string|null  $domain
+     * @param  ?string  $path
+     * @param  ?string  $domain
      * @return $this
      */
     public function withoutCookie($cookie, $path = null, $domain = null)
@@ -148,7 +148,7 @@ public function withoutCookie($cookie, $path = null, $domain = null)
     /**
      * Get the callback of the response.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getCallback()
     {
diff --git a/src/Illuminate/Http/Testing/File.php b/src/Illuminate/Http/Testing/File.php
index aaba539cfbb5..bc976fcf094e 100644
--- a/src/Illuminate/Http/Testing/File.php
+++ b/src/Illuminate/Http/Testing/File.php
@@ -30,7 +30,7 @@ class File extends UploadedFile
     /**
      * The MIME type to report.
      *
-     * @var string|null
+     * @var ?string
      */
     public $mimeTypeToReport;
 
diff --git a/src/Illuminate/Http/Testing/FileFactory.php b/src/Illuminate/Http/Testing/FileFactory.php
index 9e25d72de8f3..9175968ae7b7 100644
--- a/src/Illuminate/Http/Testing/FileFactory.php
+++ b/src/Illuminate/Http/Testing/FileFactory.php
@@ -9,7 +9,7 @@ class FileFactory
      *
      * @param  string  $name
      * @param  string|int  $kilobytes
-     * @param  string|null  $mimeType
+     * @param  ?string  $mimeType
      * @return \Illuminate\Http\Testing\File
      */
     public function create($name, $kilobytes = 0, $mimeType = null)
diff --git a/src/Illuminate/Http/Testing/MimeType.php b/src/Illuminate/Http/Testing/MimeType.php
index d188a4be35e8..5c22457f4268 100644
--- a/src/Illuminate/Http/Testing/MimeType.php
+++ b/src/Illuminate/Http/Testing/MimeType.php
@@ -56,7 +56,7 @@ public static function get($extension)
      * Search for the extension of a given MIME type.
      *
      * @param  string  $mimeType
-     * @return string|null
+     * @return ?string
      */
     public static function search($mimeType)
     {
diff --git a/src/Illuminate/Log/LogManager.php b/src/Illuminate/Log/LogManager.php
index f528bc58eb55..1d27ec74d96f 100644
--- a/src/Illuminate/Log/LogManager.php
+++ b/src/Illuminate/Log/LogManager.php
@@ -89,7 +89,7 @@ public function build(array $config)
      * Create a new, on-demand aggregate logger instance.
      *
      * @param  array  $channels
-     * @param  string|null  $channel
+     * @param  ?string  $channel
      * @return \Psr\Log\LoggerInterface
      */
     public function stack(array $channels, $channel = null)
@@ -103,7 +103,7 @@ public function stack(array $channels, $channel = null)
     /**
      * Get a log channel instance.
      *
-     * @param  string|null  $channel
+     * @param  ?string  $channel
      * @return \Psr\Log\LoggerInterface
      */
     public function channel($channel = null)
@@ -114,7 +114,7 @@ public function channel($channel = null)
     /**
      * Get a log driver instance.
      *
-     * @param  string|null  $driver
+     * @param  ?string  $driver
      * @return \Psr\Log\LoggerInterface
      */
     public function driver($driver = null)
@@ -517,7 +517,7 @@ protected function configurationFor($name)
     /**
      * Get the default log driver name.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getDefaultDriver()
     {
@@ -552,7 +552,7 @@ public function extend($driver, Closure $callback)
     /**
      * Unset the given channel instance.
      *
-     * @param  string|null  $driver
+     * @param  ?string  $driver
      * @return $this
      */
     public function forgetChannel($driver = null)
@@ -567,8 +567,8 @@ public function forgetChannel($driver = null)
     /**
      * Parse the driver name.
      *
-     * @param  string|null  $driver
-     * @return string|null
+     * @param  ?string  $driver
+     * @return ?string
      */
     protected function parseDriver($driver)
     {
diff --git a/src/Illuminate/Mail/Attachment.php b/src/Illuminate/Mail/Attachment.php
index 5c78ddf394dc..9ae47cbaf660 100644
--- a/src/Illuminate/Mail/Attachment.php
+++ b/src/Illuminate/Mail/Attachment.php
@@ -14,14 +14,14 @@ class Attachment
     /**
      * The attached file's filename.
      *
-     * @var string|null
+     * @var ?string
      */
     public $as;
 
     /**
      * The attached file's mime type.
      *
-     * @var string|null
+     * @var ?string
      */
     public $mime;
 
@@ -82,7 +82,7 @@ public static function fromStorage($path)
     /**
      * Create a mail attachment from a file in the specified storage disk.
      *
-     * @param  string|null  $disk
+     * @param  ?string  $disk
      * @param  string  $path
      * @return static
      */
diff --git a/src/Illuminate/Mail/MailManager.php b/src/Illuminate/Mail/MailManager.php
index 8d60b34dad17..faa31d31e0f7 100644
--- a/src/Illuminate/Mail/MailManager.php
+++ b/src/Illuminate/Mail/MailManager.php
@@ -62,7 +62,7 @@ public function __construct($app)
     /**
      * Get a mailer instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Mail\Mailer
      */
     public function mailer($name = null)
@@ -75,7 +75,7 @@ public function mailer($name = null)
     /**
      * Get a mailer driver instance.
      *
-     * @param  string|null  $driver
+     * @param  ?string  $driver
      * @return \Illuminate\Mail\Mailer
      */
     public function driver($driver = null)
@@ -434,7 +434,7 @@ public function setDefaultDriver(string $name)
     /**
      * Disconnect the given mailer and remove from local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function purge($name = null)
diff --git a/src/Illuminate/Mail/Mailable.php b/src/Illuminate/Mail/Mailable.php
index c5d3ea5617e8..1524e2e78b60 100644
--- a/src/Illuminate/Mail/Mailable.php
+++ b/src/Illuminate/Mail/Mailable.php
@@ -161,7 +161,7 @@ class Mailable implements MailableContract, Renderable
     /**
      * The name of the theme that should be used when formatting the message.
      *
-     * @var string|null
+     * @var ?string
      */
     public $theme;
 
@@ -549,7 +549,7 @@ public function priority($level = 3)
      * Set the sender of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function from($address, $name = null)
@@ -561,7 +561,7 @@ public function from($address, $name = null)
      * Determine if the given recipient is set on the mailable.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasFrom($address, $name = null)
@@ -573,7 +573,7 @@ public function hasFrom($address, $name = null)
      * Set the recipients of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function to($address, $name = null)
@@ -589,7 +589,7 @@ public function to($address, $name = null)
      * Determine if the given recipient is set on the mailable.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasTo($address, $name = null)
@@ -601,7 +601,7 @@ public function hasTo($address, $name = null)
      * Set the recipients of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function cc($address, $name = null)
@@ -613,7 +613,7 @@ public function cc($address, $name = null)
      * Determine if the given recipient is set on the mailable.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasCc($address, $name = null)
@@ -625,7 +625,7 @@ public function hasCc($address, $name = null)
      * Set the recipients of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function bcc($address, $name = null)
@@ -637,7 +637,7 @@ public function bcc($address, $name = null)
      * Determine if the given recipient is set on the mailable.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasBcc($address, $name = null)
@@ -649,7 +649,7 @@ public function hasBcc($address, $name = null)
      * Set the "reply to" address of the message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function replyTo($address, $name = null)
@@ -661,7 +661,7 @@ public function replyTo($address, $name = null)
      * Determine if the given replyTo is set on the mailable.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasReplyTo($address, $name = null)
@@ -675,7 +675,7 @@ public function hasReplyTo($address, $name = null)
      * All recipients are stored internally as [['name' => ?, 'address' => ?]]
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  string  $property
      * @return $this
      */
@@ -706,7 +706,7 @@ protected function setAddress($address, $name = null, $property = 'to')
      * Convert the given recipient arguments to an array.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return array
      */
     protected function addressesToArray($address, $name)
@@ -749,7 +749,7 @@ protected function normalizeRecipient($recipient)
      * Determine if the given recipient is set on the mailable.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  string  $property
      * @return bool
      */
@@ -785,7 +785,7 @@ protected function hasRecipient($address, $name = null, $property = 'to')
      * Determine if the mailable "envelope" method defines a recipient.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  string  $property
      * @return bool
      */
@@ -1005,7 +1005,7 @@ private function hasEnvelopeAttachment($attachment)
      * Attach a file to the message from storage.
      *
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $options
      * @return $this
      */
@@ -1019,7 +1019,7 @@ public function attachFromStorage($path, $name = null, array $options = [])
      *
      * @param  string  $disk
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $options
      * @return $this
      */
@@ -1041,7 +1041,7 @@ public function attachFromStorageDisk($disk, $path, $name = null, array $options
      * Determine if the mailable has the given attachment from storage.
      *
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $options
      * @return bool
      */
@@ -1055,7 +1055,7 @@ public function hasAttachmentFromStorage($path, $name = null, array $options = [
      *
      * @param  string  $disk
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $options
      * @return bool
      */
@@ -1161,7 +1161,7 @@ public function hasMetadata($key, $value)
      * Assert that the mailable is from the given address.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function assertFrom($address, $name = null)
@@ -1180,7 +1180,7 @@ public function assertFrom($address, $name = null)
      * Assert that the mailable has the given recipient.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function assertTo($address, $name = null)
@@ -1199,7 +1199,7 @@ public function assertTo($address, $name = null)
      * Assert that the mailable has the given recipient.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function assertHasTo($address, $name = null)
@@ -1211,7 +1211,7 @@ public function assertHasTo($address, $name = null)
      * Assert that the mailable has the given recipient.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function assertHasCc($address, $name = null)
@@ -1230,7 +1230,7 @@ public function assertHasCc($address, $name = null)
      * Assert that the mailable has the given recipient.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function assertHasBcc($address, $name = null)
@@ -1249,7 +1249,7 @@ public function assertHasBcc($address, $name = null)
      * Assert that the mailable has the given "reply to" address.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function assertHasReplyTo($address, $name = null)
@@ -1268,7 +1268,7 @@ public function assertHasReplyTo($address, $name = null)
      * Format the mailable recipeint for display in an assertion message.
      *
      * @param  object|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return string
      */
     private function formatAssertionRecipient($address, $name = null)
@@ -1449,7 +1449,7 @@ public function assertHasAttachedData($data, $name, array $options = [])
      * Assert the mailable has the given attachment from storage.
      *
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $options
      * @return $this
      */
@@ -1470,7 +1470,7 @@ public function assertHasAttachmentFromStorage($path, $name = null, array $optio
      *
      * @param  string  $disk
      * @param  string  $path
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $options
      * @return $this
      */
diff --git a/src/Illuminate/Mail/Mailables/Address.php b/src/Illuminate/Mail/Mailables/Address.php
index be54a24a7413..7bdf2f15fbdf 100644
--- a/src/Illuminate/Mail/Mailables/Address.php
+++ b/src/Illuminate/Mail/Mailables/Address.php
@@ -14,7 +14,7 @@ class Address
     /**
      * The recipient's name.
      *
-     * @var string|null
+     * @var ?string
      */
     public $name;
 
@@ -22,7 +22,7 @@ class Address
      * Create a new address instance.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function __construct(string $address, string $name = null)
diff --git a/src/Illuminate/Mail/Mailables/Content.php b/src/Illuminate/Mail/Mailables/Content.php
index 319cfefa744c..77b4419ff689 100644
--- a/src/Illuminate/Mail/Mailables/Content.php
+++ b/src/Illuminate/Mail/Mailables/Content.php
@@ -11,7 +11,7 @@ class Content
     /**
      * The Blade view that should be rendered for the mailable.
      *
-     * @var string|null
+     * @var ?string
      */
     public $view;
 
@@ -20,28 +20,28 @@ class Content
      *
      * Alternative syntax for "view".
      *
-     * @var string|null
+     * @var ?string
      */
     public $html;
 
     /**
      * The Blade view that represents the text version of the message.
      *
-     * @var string|null
+     * @var ?string
      */
     public $text;
 
     /**
      * The Blade view that represents the Markdown version of the message.
      *
-     * @var string|null
+     * @var ?string
      */
     public $markdown;
 
     /**
      * The pre-rendered HTML of the message.
      *
-     * @var string|null
+     * @var ?string
      */
     public $htmlString;
 
@@ -55,12 +55,12 @@ class Content
     /**
      * Create a new content definition.
      *
-     * @param  string|null  $view
-     * @param  string|null  $html
-     * @param  string|null  $text
-     * @param  string|null  $markdown
+     * @param  ?string  $view
+     * @param  ?string  $html
+     * @param  ?string  $text
+     * @param  ?string  $markdown
      * @param  array  $with
-     * @param  string|null  $htmlString
+     * @param  ?string  $htmlString
      *
      * @named-arguments-supported
      */
diff --git a/src/Illuminate/Mail/Mailables/Envelope.php b/src/Illuminate/Mail/Mailables/Envelope.php
index 7d6c4b1ee55f..f089b6f291ea 100644
--- a/src/Illuminate/Mail/Mailables/Envelope.php
+++ b/src/Illuminate/Mail/Mailables/Envelope.php
@@ -48,7 +48,7 @@ class Envelope
     /**
      * The subject of the message.
      *
-     * @var string|null
+     * @var ?string
      */
     public $subject;
 
@@ -81,7 +81,7 @@ class Envelope
      * @param  array  $cc
      * @param  array  $bcc
      * @param  array  $replyTo
-     * @param  string|null  $subject
+     * @param  ?string  $subject
      * @param  array  $tags
      * @param  array  $metadata
      * @param  \Closure|array  $using
@@ -119,7 +119,7 @@ protected function normalizeAddresses($addresses)
      * Specify who the message will be "from".
      *
      * @param  \Illuminate\Mail\Mailables\Address|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function from(Address|string $address, $name = null)
@@ -133,7 +133,7 @@ public function from(Address|string $address, $name = null)
      * Add a "to" recipient to the message envelope.
      *
      * @param  \Illuminate\Mail\Mailables\Address|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function to(Address|array|string $address, $name = null)
@@ -149,7 +149,7 @@ public function to(Address|array|string $address, $name = null)
      * Add a "cc" recipient to the message envelope.
      *
      * @param  \Illuminate\Mail\Mailables\Address|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function cc(Address|array|string $address, $name = null)
@@ -165,7 +165,7 @@ public function cc(Address|array|string $address, $name = null)
      * Add a "bcc" recipient to the message envelope.
      *
      * @param  \Illuminate\Mail\Mailables\Address|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function bcc(Address|array|string $address, $name = null)
@@ -181,7 +181,7 @@ public function bcc(Address|array|string $address, $name = null)
      * Add a "reply to" recipient to the message envelope.
      *
      * @param  \Illuminate\Mail\Mailables\Address|array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function replyTo(Address|array|string $address, $name = null)
@@ -263,7 +263,7 @@ public function using(Closure $callback)
      * Determine if the message is from the given address.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function isFrom(string $address, string $name = null)
@@ -280,7 +280,7 @@ public function isFrom(string $address, string $name = null)
      * Determine if the message has the given address as a recipient.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasTo(string $address, string $name = null)
@@ -292,7 +292,7 @@ public function hasTo(string $address, string $name = null)
      * Determine if the message has the given address as a "cc" recipient.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasCc(string $address, string $name = null)
@@ -304,7 +304,7 @@ public function hasCc(string $address, string $name = null)
      * Determine if the message has the given address as a "bcc" recipient.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasBcc(string $address, string $name = null)
@@ -316,7 +316,7 @@ public function hasBcc(string $address, string $name = null)
      * Determine if the message has the given address as a "reply to" recipient.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function hasReplyTo(string $address, string $name = null)
@@ -329,7 +329,7 @@ public function hasReplyTo(string $address, string $name = null)
      *
      * @param  array  $recipients
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     protected function hasRecipient(array $recipients, string $address, ?string $name = null)
diff --git a/src/Illuminate/Mail/Mailables/Headers.php b/src/Illuminate/Mail/Mailables/Headers.php
index 87cee52b4768..9680d5b107f4 100644
--- a/src/Illuminate/Mail/Mailables/Headers.php
+++ b/src/Illuminate/Mail/Mailables/Headers.php
@@ -12,7 +12,7 @@ class Headers
     /**
      * The message's message ID.
      *
-     * @var string|null
+     * @var ?string
      */
     public $messageId;
 
@@ -33,7 +33,7 @@ class Headers
     /**
      * Create a new instance of headers for a message.
      *
-     * @param  string|null  $messageId
+     * @param  ?string  $messageId
      * @param  array  $references
      * @param  array  $text
      * @return void
diff --git a/src/Illuminate/Mail/Mailer.php b/src/Illuminate/Mail/Mailer.php
index 4a253cf29a19..255b0c264cb1 100755
--- a/src/Illuminate/Mail/Mailer.php
+++ b/src/Illuminate/Mail/Mailer.php
@@ -107,7 +107,7 @@ public function __construct(string $name, Factory $views, TransportInterface $tr
      * Set the global from address and name.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function alwaysFrom($address, $name = null)
@@ -119,7 +119,7 @@ public function alwaysFrom($address, $name = null)
      * Set the global reply-to address and name.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function alwaysReplyTo($address, $name = null)
@@ -142,7 +142,7 @@ public function alwaysReturnPath($address)
      * Set the global to address and name.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function alwaysTo($address, $name = null)
@@ -401,7 +401,7 @@ protected function setGlobalToAndRemoveCcAndBcc($message)
      * Queue a new e-mail message for sending.
      *
      * @param  \Illuminate\Contracts\Mail\Mailable|string|array  $view
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      *
      * @throws \InvalidArgumentException
@@ -450,7 +450,7 @@ public function queueOn($queue, $view)
      *
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  \Illuminate\Contracts\Mail\Mailable  $view
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      *
      * @throws \InvalidArgumentException
diff --git a/src/Illuminate/Mail/Message.php b/src/Illuminate/Mail/Message.php
index 88e83eee8eaa..0eadbe483308 100755
--- a/src/Illuminate/Mail/Message.php
+++ b/src/Illuminate/Mail/Message.php
@@ -46,7 +46,7 @@ public function __construct(Email $message)
      * Add a "from" address to the message.
      *
      * @param  string|array  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function from($address, $name = null)
@@ -62,7 +62,7 @@ public function from($address, $name = null)
      * Set the "sender" of the message.
      *
      * @param  string|array  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function sender($address, $name = null)
@@ -91,7 +91,7 @@ public function returnPath($address)
      * Add a recipient to the message.
      *
      * @param  string|array  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  bool  $override
      * @return $this
      */
@@ -128,7 +128,7 @@ public function forgetTo()
      * Add a carbon copy to the message.
      *
      * @param  string|array  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  bool  $override
      * @return $this
      */
@@ -165,7 +165,7 @@ public function forgetCc()
      * Add a blind carbon copy to the message.
      *
      * @param  string|array  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  bool  $override
      * @return $this
      */
@@ -202,7 +202,7 @@ public function forgetBcc()
      * Add a "reply to" address to the message.
      *
      * @param  string|array  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function replyTo($address, $name = null)
@@ -368,7 +368,7 @@ function ($data) use ($file) {
      *
      * @param  string  $data
      * @param  string  $name
-     * @param  string|null  $contentType
+     * @param  ?string  $contentType
      * @return string
      */
     public function embedData($data, $name, $contentType = null)
diff --git a/src/Illuminate/Notifications/ChannelManager.php b/src/Illuminate/Notifications/ChannelManager.php
index 8eb9c251024d..97093c1af33a 100644
--- a/src/Illuminate/Notifications/ChannelManager.php
+++ b/src/Illuminate/Notifications/ChannelManager.php
@@ -21,7 +21,7 @@ class ChannelManager extends Manager implements DispatcherContract, FactoryContr
     /**
      * The locale used when sending notifications.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $locale;
 
@@ -57,7 +57,7 @@ public function sendNow($notifiables, $notification, array $channels = null)
     /**
      * Get a channel instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return mixed
      */
     public function channel($name = null)
diff --git a/src/Illuminate/Notifications/Console/NotificationTableCommand.php b/src/Illuminate/Notifications/Console/NotificationTableCommand.php
index a0161ce6b7c9..5ecdb07d66e9 100644
--- a/src/Illuminate/Notifications/Console/NotificationTableCommand.php
+++ b/src/Illuminate/Notifications/Console/NotificationTableCommand.php
@@ -22,7 +22,7 @@ class NotificationTableCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Notifications/Messages/MailMessage.php b/src/Illuminate/Notifications/Messages/MailMessage.php
index d696c8a84a98..95dea55489b2 100644
--- a/src/Illuminate/Notifications/Messages/MailMessage.php
+++ b/src/Illuminate/Notifications/Messages/MailMessage.php
@@ -31,14 +31,14 @@ class MailMessage extends SimpleMessage implements Renderable
     /**
      * The Markdown template to render (if applicable).
      *
-     * @var string|null
+     * @var ?string
      */
     public $markdown = 'notifications::email';
 
     /**
      * The current theme being used when generating emails.
      *
-     * @var string|null
+     * @var ?string
      */
     public $theme;
 
@@ -176,7 +176,7 @@ public function theme($theme)
      * Set the from address for the mail message.
      *
      * @param  string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function from($address, $name = null)
@@ -190,7 +190,7 @@ public function from($address, $name = null)
      * Set the "reply to" address of the message.
      *
      * @param  array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function replyTo($address, $name = null)
@@ -208,7 +208,7 @@ public function replyTo($address, $name = null)
      * Set the cc address for the mail message.
      *
      * @param  array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function cc($address, $name = null)
@@ -226,7 +226,7 @@ public function cc($address, $name = null)
      * Set the bcc address for the mail message.
      *
      * @param  array|string  $address
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return $this
      */
     public function bcc($address, $name = null)
diff --git a/src/Illuminate/Notifications/Notification.php b/src/Illuminate/Notifications/Notification.php
index 3af22645e478..508ed3d1fee8 100644
--- a/src/Illuminate/Notifications/Notification.php
+++ b/src/Illuminate/Notifications/Notification.php
@@ -18,7 +18,7 @@ class Notification
     /**
      * The locale to be used when sending the notification.
      *
-     * @var string|null
+     * @var ?string
      */
     public $locale;
 
diff --git a/src/Illuminate/Notifications/NotificationSender.php b/src/Illuminate/Notifications/NotificationSender.php
index 698d19dcb95f..0c4c487d079c 100644
--- a/src/Illuminate/Notifications/NotificationSender.php
+++ b/src/Illuminate/Notifications/NotificationSender.php
@@ -40,7 +40,7 @@ class NotificationSender
     /**
      * The locale to be used when sending notifications.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $locale;
 
@@ -50,7 +50,7 @@ class NotificationSender
      * @param  \Illuminate\Notifications\ChannelManager  $manager
      * @param  \Illuminate\Contracts\Bus\Dispatcher  $bus
      * @param  \Illuminate\Contracts\Events\Dispatcher  $events
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return void
      */
     public function __construct($manager, $bus, $events, $locale = null)
@@ -115,7 +115,7 @@ public function sendNow($notifiables, $notification, array $channels = null)
      *
      * @param  mixed  $notifiable
      * @param  mixed  $notification
-     * @return string|null
+     * @return ?string
      */
     protected function preferredLocale($notifiable, $notification)
     {
diff --git a/src/Illuminate/Pagination/AbstractCursorPaginator.php b/src/Illuminate/Pagination/AbstractCursorPaginator.php
index e6700789c176..d67d50e07b94 100644
--- a/src/Illuminate/Pagination/AbstractCursorPaginator.php
+++ b/src/Illuminate/Pagination/AbstractCursorPaginator.php
@@ -54,7 +54,7 @@ abstract class AbstractCursorPaginator implements Htmlable
     /**
      * The URL fragment to add to all URLs.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $fragment;
 
@@ -119,7 +119,7 @@ public function url($cursor)
     /**
      * Get the URL for the previous page.
      *
-     * @return string|null
+     * @return ?string
      */
     public function previousPageUrl()
     {
@@ -133,7 +133,7 @@ public function previousPageUrl()
     /**
      * The URL for the next page, or null.
      *
-     * @return string|null
+     * @return ?string
      */
     public function nextPageUrl()
     {
@@ -233,7 +233,7 @@ public function getParametersForItem($item)
      *
      * @param  \ArrayAccess|\stdClass  $item
      * @param  string  $parameterName
-     * @return string|null
+     * @return ?string
      */
     protected function getPivotParameterForItem($item, $parameterName)
     {
@@ -266,7 +266,7 @@ protected function ensureParameterIsPrimitive($parameter)
     /**
      * Get / set the URL fragment to be appended to URLs.
      *
-     * @param  string|null  $fragment
+     * @param  ?string  $fragment
      * @return $this|string|null
      */
     public function fragment($fragment = null)
@@ -284,7 +284,7 @@ public function fragment($fragment = null)
      * Add a set of query string values to the paginator.
      *
      * @param  array|string|null  $key
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @return $this
      */
     public function appends($key, $value = null)
@@ -476,7 +476,7 @@ public function setPath($path)
     /**
      * Get the base path for paginator generated URLs.
      *
-     * @return string|null
+     * @return ?string
      */
     public function path()
     {
diff --git a/src/Illuminate/Pagination/AbstractPaginator.php b/src/Illuminate/Pagination/AbstractPaginator.php
index a4979840f3b3..7e01b2974af2 100644
--- a/src/Illuminate/Pagination/AbstractPaginator.php
+++ b/src/Illuminate/Pagination/AbstractPaginator.php
@@ -55,7 +55,7 @@ abstract class AbstractPaginator implements Htmlable
     /**
      * The URL fragment to add to all URLs.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $fragment;
 
@@ -136,7 +136,7 @@ protected function isValidPageNumber($page)
     /**
      * Get the URL for the previous page.
      *
-     * @return string|null
+     * @return ?string
      */
     public function previousPageUrl()
     {
@@ -189,7 +189,7 @@ public function url($page)
     /**
      * Get / set the URL fragment to be appended to URLs.
      *
-     * @param  string|null  $fragment
+     * @param  ?string  $fragment
      * @return $this|string|null
      */
     public function fragment($fragment = null)
@@ -207,7 +207,7 @@ public function fragment($fragment = null)
      * Add a set of query string values to the paginator.
      *
      * @param  array|string|null  $key
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @return $this
      */
     public function appends($key, $value = null)
@@ -462,7 +462,7 @@ public function onEachSide($count)
     /**
      * Get the base path for paginator generated URLs.
      *
-     * @return string|null
+     * @return ?string
      */
     public function path()
     {
diff --git a/src/Illuminate/Pagination/Cursor.php b/src/Illuminate/Pagination/Cursor.php
index 1d622808bf07..7a68e29747b2 100644
--- a/src/Illuminate/Pagination/Cursor.php
+++ b/src/Illuminate/Pagination/Cursor.php
@@ -37,7 +37,7 @@ public function __construct(array $parameters, $pointsToNextItems = true)
      * Get the given parameter from the cursor.
      *
      * @param  string  $parameterName
-     * @return string|null
+     * @return ?string
      *
      * @throws \UnexpectedValueException
      */
@@ -108,7 +108,7 @@ public function encode()
     /**
      * Get a cursor instance from the encoded string representation.
      *
-     * @param  string|null  $encodedString
+     * @param  ?string  $encodedString
      * @return static|null
      */
     public static function fromEncoded($encodedString)
diff --git a/src/Illuminate/Pagination/CursorPaginator.php b/src/Illuminate/Pagination/CursorPaginator.php
index 4c0a8965c03d..a879beceafd6 100644
--- a/src/Illuminate/Pagination/CursorPaginator.php
+++ b/src/Illuminate/Pagination/CursorPaginator.php
@@ -66,7 +66,7 @@ protected function setItems($items)
     /**
      * Render the paginator using the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return \Illuminate\Contracts\Support\Htmlable
      */
@@ -78,7 +78,7 @@ public function links($view = null, $data = [])
     /**
      * Render the paginator using the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return \Illuminate\Contracts\Support\Htmlable
      */
diff --git a/src/Illuminate/Pagination/LengthAwarePaginator.php b/src/Illuminate/Pagination/LengthAwarePaginator.php
index 8d3e0ab77fbe..f0df465c25cb 100644
--- a/src/Illuminate/Pagination/LengthAwarePaginator.php
+++ b/src/Illuminate/Pagination/LengthAwarePaginator.php
@@ -70,7 +70,7 @@ protected function setCurrentPage($currentPage, $pageName)
     /**
      * Render the paginator using the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return \Illuminate\Contracts\Support\Htmlable
      */
@@ -82,7 +82,7 @@ public function links($view = null, $data = [])
     /**
      * Render the paginator using the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return \Illuminate\Contracts\Support\Htmlable
      */
@@ -165,7 +165,7 @@ public function hasMorePages()
     /**
      * Get the URL for the next page.
      *
-     * @return string|null
+     * @return ?string
      */
     public function nextPageUrl()
     {
diff --git a/src/Illuminate/Pagination/Paginator.php b/src/Illuminate/Pagination/Paginator.php
index d307ee9ff3f3..0f5ba3a566cc 100644
--- a/src/Illuminate/Pagination/Paginator.php
+++ b/src/Illuminate/Pagination/Paginator.php
@@ -75,7 +75,7 @@ protected function setItems($items)
     /**
      * Get the URL for the next page.
      *
-     * @return string|null
+     * @return ?string
      */
     public function nextPageUrl()
     {
@@ -87,7 +87,7 @@ public function nextPageUrl()
     /**
      * Render the paginator using the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return string
      */
@@ -99,7 +99,7 @@ public function links($view = null, $data = [])
     /**
      * Render the paginator using the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  array  $data
      * @return \Illuminate\Contracts\Support\Htmlable
      */
diff --git a/src/Illuminate/Pipeline/Hub.php b/src/Illuminate/Pipeline/Hub.php
index 91e9b3f306b8..ea52ef2191d9 100644
--- a/src/Illuminate/Pipeline/Hub.php
+++ b/src/Illuminate/Pipeline/Hub.php
@@ -60,7 +60,7 @@ public function pipeline($name, Closure $callback)
      * Send an object through one of the available pipelines.
      *
      * @param  mixed  $object
-     * @param  string|null  $pipeline
+     * @param  ?string  $pipeline
      * @return mixed
      */
     public function pipe($object, $pipeline = null)
diff --git a/src/Illuminate/Queue/BeanstalkdQueue.php b/src/Illuminate/Queue/BeanstalkdQueue.php
index 3f1e0a5d6a96..e726ecf753ea 100755
--- a/src/Illuminate/Queue/BeanstalkdQueue.php
+++ b/src/Illuminate/Queue/BeanstalkdQueue.php
@@ -63,7 +63,7 @@ public function __construct(Pheanstalk $pheanstalk,
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null)
@@ -78,7 +78,7 @@ public function size($queue = null)
      *
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function push($job, $data = '', $queue = null)
@@ -98,7 +98,7 @@ function ($payload, $queue) {
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -115,7 +115,7 @@ public function pushRaw($payload, $queue = null, array $options = [])
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $job, $data = '', $queue = null)
@@ -141,7 +141,7 @@ function ($payload, $queue, $delay) {
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return void
      */
     public function bulk($jobs, $data = '', $queue = null)
@@ -158,7 +158,7 @@ public function bulk($jobs, $data = '', $queue = null)
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null)
@@ -191,7 +191,7 @@ public function deleteMessage($queue, $id)
     /**
      * Get the queue or return the default.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return string
      */
     public function getQueue($queue)
diff --git a/src/Illuminate/Queue/Capsule/Manager.php b/src/Illuminate/Queue/Capsule/Manager.php
index c5ceb872666f..45c43ea3a440 100644
--- a/src/Illuminate/Queue/Capsule/Manager.php
+++ b/src/Illuminate/Queue/Capsule/Manager.php
@@ -77,7 +77,7 @@ protected function registerConnectors()
     /**
      * Get a connection instance from the global manager.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return \Illuminate\Contracts\Queue\Queue
      */
     public static function connection($connection = null)
@@ -90,8 +90,8 @@ public static function connection($connection = null)
      *
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
-     * @param  string|null  $connection
+     * @param  ?string  $queue
+     * @param  ?string  $connection
      * @return mixed
      */
     public static function push($job, $data = '', $queue = null, $connection = null)
@@ -104,8 +104,8 @@ public static function push($job, $data = '', $queue = null, $connection = null)
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
-     * @param  string|null  $connection
+     * @param  ?string  $queue
+     * @param  ?string  $connection
      * @return mixed
      */
     public static function bulk($jobs, $data = '', $queue = null, $connection = null)
@@ -119,8 +119,8 @@ public static function bulk($jobs, $data = '', $queue = null, $connection = null
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
-     * @param  string|null  $connection
+     * @param  ?string  $queue
+     * @param  ?string  $connection
      * @return mixed
      */
     public static function later($delay, $job, $data = '', $queue = null, $connection = null)
@@ -131,7 +131,7 @@ public static function later($delay, $job, $data = '', $queue = null, $connectio
     /**
      * Get a registered connection instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Queue\Queue
      */
     public function getConnection($name = null)
diff --git a/src/Illuminate/Queue/Connectors/RedisConnector.php b/src/Illuminate/Queue/Connectors/RedisConnector.php
index d442eea99f11..1126db027f16 100644
--- a/src/Illuminate/Queue/Connectors/RedisConnector.php
+++ b/src/Illuminate/Queue/Connectors/RedisConnector.php
@@ -25,7 +25,7 @@ class RedisConnector implements ConnectorInterface
      * Create a new Redis queue connector instance.
      *
      * @param  \Illuminate\Contracts\Redis\Factory  $redis
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return void
      */
     public function __construct(Redis $redis, $connection = null)
diff --git a/src/Illuminate/Queue/Console/BatchesTableCommand.php b/src/Illuminate/Queue/Console/BatchesTableCommand.php
index c1ce2d9bb474..14e6d8a2b64f 100644
--- a/src/Illuminate/Queue/Console/BatchesTableCommand.php
+++ b/src/Illuminate/Queue/Console/BatchesTableCommand.php
@@ -22,7 +22,7 @@ class BatchesTableCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/ClearCommand.php b/src/Illuminate/Queue/Console/ClearCommand.php
index 8b48c3e0ea32..cfdffb1b312a 100644
--- a/src/Illuminate/Queue/Console/ClearCommand.php
+++ b/src/Illuminate/Queue/Console/ClearCommand.php
@@ -27,7 +27,7 @@ class ClearCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/FailedTableCommand.php b/src/Illuminate/Queue/Console/FailedTableCommand.php
index f3f20ccaf19b..bd89a7206082 100644
--- a/src/Illuminate/Queue/Console/FailedTableCommand.php
+++ b/src/Illuminate/Queue/Console/FailedTableCommand.php
@@ -22,7 +22,7 @@ class FailedTableCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/FlushFailedCommand.php b/src/Illuminate/Queue/Console/FlushFailedCommand.php
index 86a5d16c87a5..5ed9d37979f4 100644
--- a/src/Illuminate/Queue/Console/FlushFailedCommand.php
+++ b/src/Illuminate/Queue/Console/FlushFailedCommand.php
@@ -20,7 +20,7 @@ class FlushFailedCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/ForgetFailedCommand.php b/src/Illuminate/Queue/Console/ForgetFailedCommand.php
index f4625e113053..dc25a82c62eb 100644
--- a/src/Illuminate/Queue/Console/ForgetFailedCommand.php
+++ b/src/Illuminate/Queue/Console/ForgetFailedCommand.php
@@ -20,7 +20,7 @@ class ForgetFailedCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/ListFailedCommand.php b/src/Illuminate/Queue/Console/ListFailedCommand.php
index 4ccaf30ea242..ea39d3b4f3ed 100644
--- a/src/Illuminate/Queue/Console/ListFailedCommand.php
+++ b/src/Illuminate/Queue/Console/ListFailedCommand.php
@@ -21,7 +21,7 @@ class ListFailedCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
@@ -90,7 +90,7 @@ protected function parseFailedJob(array $failed)
      * Extract the failed job name from payload.
      *
      * @param  string  $payload
-     * @return string|null
+     * @return ?string
      */
     private function extractJobName($payload)
     {
@@ -107,7 +107,7 @@ private function extractJobName($payload)
      * Match the job name from the payload.
      *
      * @param  array  $payload
-     * @return string|null
+     * @return ?string
      */
     protected function matchJobName($payload)
     {
diff --git a/src/Illuminate/Queue/Console/ListenCommand.php b/src/Illuminate/Queue/Console/ListenCommand.php
index 2952c627959f..568b8f300039 100755
--- a/src/Illuminate/Queue/Console/ListenCommand.php
+++ b/src/Illuminate/Queue/Console/ListenCommand.php
@@ -33,7 +33,7 @@ class ListenCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/MonitorCommand.php b/src/Illuminate/Queue/Console/MonitorCommand.php
index 527d6a88c5a3..b127487c21db 100644
--- a/src/Illuminate/Queue/Console/MonitorCommand.php
+++ b/src/Illuminate/Queue/Console/MonitorCommand.php
@@ -26,7 +26,7 @@ class MonitorCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/PruneBatchesCommand.php b/src/Illuminate/Queue/Console/PruneBatchesCommand.php
index 5e2d32337055..cfda2dd23135 100644
--- a/src/Illuminate/Queue/Console/PruneBatchesCommand.php
+++ b/src/Illuminate/Queue/Console/PruneBatchesCommand.php
@@ -27,7 +27,7 @@ class PruneBatchesCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/PruneFailedJobsCommand.php b/src/Illuminate/Queue/Console/PruneFailedJobsCommand.php
index 61f7903b5f11..cbee0b8aa60b 100644
--- a/src/Illuminate/Queue/Console/PruneFailedJobsCommand.php
+++ b/src/Illuminate/Queue/Console/PruneFailedJobsCommand.php
@@ -23,7 +23,7 @@ class PruneFailedJobsCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/RestartCommand.php b/src/Illuminate/Queue/Console/RestartCommand.php
index 6dfbcb1fa69a..7544d4429aaf 100644
--- a/src/Illuminate/Queue/Console/RestartCommand.php
+++ b/src/Illuminate/Queue/Console/RestartCommand.php
@@ -24,7 +24,7 @@ class RestartCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/RetryBatchCommand.php b/src/Illuminate/Queue/Console/RetryBatchCommand.php
index b99e00206866..e48aeaa87884 100644
--- a/src/Illuminate/Queue/Console/RetryBatchCommand.php
+++ b/src/Illuminate/Queue/Console/RetryBatchCommand.php
@@ -21,7 +21,7 @@ class RetryBatchCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/RetryCommand.php b/src/Illuminate/Queue/Console/RetryCommand.php
index ef6a5ed49de3..61840c5b1332 100644
--- a/src/Illuminate/Queue/Console/RetryCommand.php
+++ b/src/Illuminate/Queue/Console/RetryCommand.php
@@ -28,7 +28,7 @@ class RetryCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/TableCommand.php b/src/Illuminate/Queue/Console/TableCommand.php
index aa25dafeb448..9d7fd025db77 100644
--- a/src/Illuminate/Queue/Console/TableCommand.php
+++ b/src/Illuminate/Queue/Console/TableCommand.php
@@ -22,7 +22,7 @@ class TableCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/Console/WorkCommand.php b/src/Illuminate/Queue/Console/WorkCommand.php
index abf580fd9bae..4ef4bf0c96dd 100644
--- a/src/Illuminate/Queue/Console/WorkCommand.php
+++ b/src/Illuminate/Queue/Console/WorkCommand.php
@@ -47,7 +47,7 @@ class WorkCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Queue/DatabaseQueue.php b/src/Illuminate/Queue/DatabaseQueue.php
index bce025c53340..641cbd0bfd6d 100644
--- a/src/Illuminate/Queue/DatabaseQueue.php
+++ b/src/Illuminate/Queue/DatabaseQueue.php
@@ -67,7 +67,7 @@ public function __construct(Connection $database,
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null)
@@ -82,7 +82,7 @@ public function size($queue = null)
      *
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function push($job, $data = '', $queue = null)
@@ -102,7 +102,7 @@ function ($payload, $queue) {
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -117,7 +117,7 @@ public function pushRaw($payload, $queue = null, array $options = [])
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return void
      */
     public function later($delay, $job, $data = '', $queue = null)
@@ -138,7 +138,7 @@ function ($payload, $queue, $delay) {
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function bulk($jobs, $data = '', $queue = null)
@@ -174,7 +174,7 @@ public function release($queue, $job, $delay)
     /**
      * Push a raw payload to the database with a given delay of (n) seconds.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  string  $payload
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  int  $attempts
@@ -190,7 +190,7 @@ protected function pushToDatabase($queue, $payload, $delay = 0, $attempts = 0)
     /**
      * Create an array to insert for the given job.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  string  $payload
      * @param  int  $availableAt
      * @param  int  $attempts
@@ -211,7 +211,7 @@ protected function buildDatabaseRecord($queue, $payload, $availableAt, $attempts
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      *
      * @throws \Throwable
@@ -230,7 +230,7 @@ public function pop($queue = null)
     /**
      * Get the next available job for the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Queue\Jobs\DatabaseJobRecord|null
      */
     protected function getNextAvailableJob($queue)
@@ -393,7 +393,7 @@ public function clear($queue)
     /**
      * Get the queue or return the default.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return string
      */
     public function getQueue($queue)
diff --git a/src/Illuminate/Queue/Failed/DatabaseUuidFailedJobProvider.php b/src/Illuminate/Queue/Failed/DatabaseUuidFailedJobProvider.php
index c676faab5a30..4e3d941c6631 100644
--- a/src/Illuminate/Queue/Failed/DatabaseUuidFailedJobProvider.php
+++ b/src/Illuminate/Queue/Failed/DatabaseUuidFailedJobProvider.php
@@ -51,7 +51,7 @@ public function __construct(ConnectionResolverInterface $resolver, $database, $t
      * @param  string  $queue
      * @param  string  $payload
      * @param  \Throwable  $exception
-     * @return string|null
+     * @return ?string
      */
     public function log($connection, $queue, $payload, $exception)
     {
diff --git a/src/Illuminate/Queue/InvalidPayloadException.php b/src/Illuminate/Queue/InvalidPayloadException.php
index 788fa660db8f..4bc6727abaf7 100644
--- a/src/Illuminate/Queue/InvalidPayloadException.php
+++ b/src/Illuminate/Queue/InvalidPayloadException.php
@@ -9,7 +9,7 @@ class InvalidPayloadException extends InvalidArgumentException
     /**
      * Create a new exception instance.
      *
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @return void
      */
     public function __construct($message = null)
diff --git a/src/Illuminate/Queue/Jobs/Job.php b/src/Illuminate/Queue/Jobs/Job.php
index d5464946b7ee..3adec3692502 100755
--- a/src/Illuminate/Queue/Jobs/Job.php
+++ b/src/Illuminate/Queue/Jobs/Job.php
@@ -77,7 +77,7 @@ abstract public function getRawBody();
     /**
      * Get the UUID of the job.
      *
-     * @return string|null
+     * @return ?string
      */
     public function uuid()
     {
diff --git a/src/Illuminate/Queue/Jobs/RedisJob.php b/src/Illuminate/Queue/Jobs/RedisJob.php
index 1486ebcf9d9c..8cdb049abc99 100644
--- a/src/Illuminate/Queue/Jobs/RedisJob.php
+++ b/src/Illuminate/Queue/Jobs/RedisJob.php
@@ -110,7 +110,7 @@ public function attempts()
     /**
      * Get the job identifier.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getJobId()
     {
diff --git a/src/Illuminate/Queue/ListenerOptions.php b/src/Illuminate/Queue/ListenerOptions.php
index d71989d90294..be7ef18321f7 100644
--- a/src/Illuminate/Queue/ListenerOptions.php
+++ b/src/Illuminate/Queue/ListenerOptions.php
@@ -15,7 +15,7 @@ class ListenerOptions extends WorkerOptions
      * Create a new listener options instance.
      *
      * @param  string  $name
-     * @param  string|null  $environment
+     * @param  ?string  $environment
      * @param  int|int[]  $backoff
      * @param  int  $memory
      * @param  int  $timeout
diff --git a/src/Illuminate/Queue/NullQueue.php b/src/Illuminate/Queue/NullQueue.php
index 10493a1b699d..6e7cd5af9c72 100644
--- a/src/Illuminate/Queue/NullQueue.php
+++ b/src/Illuminate/Queue/NullQueue.php
@@ -9,7 +9,7 @@ class NullQueue extends Queue implements QueueContract
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null)
@@ -22,7 +22,7 @@ public function size($queue = null)
      *
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function push($job, $data = '', $queue = null)
@@ -34,7 +34,7 @@ public function push($job, $data = '', $queue = null)
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -49,7 +49,7 @@ public function pushRaw($payload, $queue = null, array $options = [])
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $job, $data = '', $queue = null)
@@ -60,7 +60,7 @@ public function later($delay, $job, $data = '', $queue = null)
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null)
diff --git a/src/Illuminate/Queue/Queue.php b/src/Illuminate/Queue/Queue.php
index 033494773a16..8f4a4329e758 100755
--- a/src/Illuminate/Queue/Queue.php
+++ b/src/Illuminate/Queue/Queue.php
@@ -76,7 +76,7 @@ public function laterOn($queue, $delay, $job, $data = '')
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return void
      */
     public function bulk($jobs, $data = '', $queue = null)
diff --git a/src/Illuminate/Queue/QueueManager.php b/src/Illuminate/Queue/QueueManager.php
index 33f1cd1652e9..c6a95a1792de 100755
--- a/src/Illuminate/Queue/QueueManager.php
+++ b/src/Illuminate/Queue/QueueManager.php
@@ -113,7 +113,7 @@ public function stopping($callback)
     /**
      * Determine if the driver is connected.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return bool
      */
     public function connected($name = null)
@@ -124,7 +124,7 @@ public function connected($name = null)
     /**
      * Resolve a queue connection instance.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Queue\Queue
      */
     public function connection($name = null)
@@ -244,7 +244,7 @@ public function setDefaultDriver($name)
     /**
      * Get the full name for the given connection.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return string
      */
     public function getName($connection = null)
diff --git a/src/Illuminate/Queue/RedisQueue.php b/src/Illuminate/Queue/RedisQueue.php
index 4c376a81a2c0..28f78413706a 100644
--- a/src/Illuminate/Queue/RedisQueue.php
+++ b/src/Illuminate/Queue/RedisQueue.php
@@ -59,7 +59,7 @@ class RedisQueue extends Queue implements QueueContract, ClearableQueue
      *
      * @param  \Illuminate\Contracts\Redis\Factory  $redis
      * @param  string  $default
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @param  int  $retryAfter
      * @param  int|null  $blockFor
      * @param  bool  $dispatchAfterCommit
@@ -86,7 +86,7 @@ public function __construct(Redis $redis,
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null)
@@ -103,7 +103,7 @@ public function size($queue = null)
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return void
      */
     public function bulk($jobs, $data = '', $queue = null)
@@ -126,7 +126,7 @@ public function bulk($jobs, $data = '', $queue = null)
      *
      * @param  object|string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function push($job, $data = '', $queue = null)
@@ -146,7 +146,7 @@ function ($payload, $queue) {
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -166,7 +166,7 @@ public function pushRaw($payload, $queue = null, array $options = [])
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  object|string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $job, $data = '', $queue = null)
@@ -187,7 +187,7 @@ function ($payload, $queue, $delay) {
      *
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     protected function laterRaw($delay, $payload, $queue = null)
@@ -218,7 +218,7 @@ protected function createPayloadArray($job, $queue, $data = '')
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null)
@@ -352,7 +352,7 @@ protected function getRandomId()
     /**
      * Get the queue or return the default.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return string
      */
     public function getQueue($queue)
diff --git a/src/Illuminate/Queue/SqsQueue.php b/src/Illuminate/Queue/SqsQueue.php
index 38849f9978e8..cd1d04c68286 100755
--- a/src/Illuminate/Queue/SqsQueue.php
+++ b/src/Illuminate/Queue/SqsQueue.php
@@ -64,7 +64,7 @@ public function __construct(SqsClient $sqs,
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null)
@@ -84,7 +84,7 @@ public function size($queue = null)
      *
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function push($job, $data = '', $queue = null)
@@ -104,7 +104,7 @@ function ($payload, $queue) {
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -121,7 +121,7 @@ public function pushRaw($payload, $queue = null, array $options = [])
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $job, $data = '', $queue = null)
@@ -146,7 +146,7 @@ function ($payload, $queue, $delay) {
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return void
      */
     public function bulk($jobs, $data = '', $queue = null)
@@ -163,7 +163,7 @@ public function bulk($jobs, $data = '', $queue = null)
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null)
@@ -199,7 +199,7 @@ public function clear($queue)
     /**
      * Get the queue or return the default.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return string
      */
     public function getQueue($queue)
diff --git a/src/Illuminate/Queue/SyncQueue.php b/src/Illuminate/Queue/SyncQueue.php
index f416b0232fd3..3b624b537402 100755
--- a/src/Illuminate/Queue/SyncQueue.php
+++ b/src/Illuminate/Queue/SyncQueue.php
@@ -15,7 +15,7 @@ class SyncQueue extends Queue implements QueueContract
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null)
@@ -28,7 +28,7 @@ public function size($queue = null)
      *
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      *
      * @throws \Throwable
@@ -124,7 +124,7 @@ protected function handleException(Job $queueJob, Throwable $e)
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -139,7 +139,7 @@ public function pushRaw($payload, $queue = null, array $options = [])
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $job, $data = '', $queue = null)
@@ -150,7 +150,7 @@ public function later($delay, $job, $data = '', $queue = null)
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null)
diff --git a/src/Illuminate/Redis/Connections/Connection.php b/src/Illuminate/Redis/Connections/Connection.php
index e3e55e94be33..4e0118f9b38f 100644
--- a/src/Illuminate/Redis/Connections/Connection.php
+++ b/src/Illuminate/Redis/Connections/Connection.php
@@ -25,7 +25,7 @@ abstract class Connection
     /**
      * The Redis connection name.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $name;
 
@@ -149,7 +149,7 @@ public function listen(Closure $callback)
     /**
      * Get the connection name.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getName()
     {
diff --git a/src/Illuminate/Redis/Connections/PhpRedisConnection.php b/src/Illuminate/Redis/Connections/PhpRedisConnection.php
index d4c1f6762e6b..3bbb5f1295d6 100644
--- a/src/Illuminate/Redis/Connections/PhpRedisConnection.php
+++ b/src/Illuminate/Redis/Connections/PhpRedisConnection.php
@@ -48,7 +48,7 @@ public function __construct($client, callable $connector = null, array $config =
      * Returns the value of the given key.
      *
      * @param  string  $key
-     * @return string|null
+     * @return ?string
      */
     public function get($key)
     {
@@ -75,9 +75,9 @@ public function mget(array $keys)
      *
      * @param  string  $key
      * @param  mixed  $value
-     * @param  string|null  $expireResolution
+     * @param  ?string  $expireResolution
      * @param  int|null  $expireTTL
-     * @param  string|null  $flag
+     * @param  ?string  $flag
      * @return bool
      */
     public function set($key, $value, $expireResolution = null, $expireTTL = null, $flag = null)
diff --git a/src/Illuminate/Redis/RedisManager.php b/src/Illuminate/Redis/RedisManager.php
index e869741856c6..9300cb1eaa1e 100644
--- a/src/Illuminate/Redis/RedisManager.php
+++ b/src/Illuminate/Redis/RedisManager.php
@@ -76,7 +76,7 @@ public function __construct($app, $driver, array $config)
     /**
      * Get a Redis connection by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Redis\Connections\Connection
      */
     public function connection($name = null)
@@ -95,7 +95,7 @@ public function connection($name = null)
     /**
      * Resolve the given connection by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Redis\Connections\Connection
      *
      * @throws \InvalidArgumentException
@@ -240,7 +240,7 @@ public function setDriver($driver)
     /**
      * Disconnect the given connection and remove from local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function purge($name = null)
diff --git a/src/Illuminate/Routing/CompiledRouteCollection.php b/src/Illuminate/Routing/CompiledRouteCollection.php
index 2b693f85f25a..2ee9f01d01d2 100644
--- a/src/Illuminate/Routing/CompiledRouteCollection.php
+++ b/src/Illuminate/Routing/CompiledRouteCollection.php
@@ -166,7 +166,7 @@ protected function requestWithoutTrailingSlash(Request $request)
     /**
      * Get routes from the collection by method.
      *
-     * @param  string|null  $method
+     * @param  ?string  $method
      * @return \Illuminate\Routing\Route[]
      */
     public function get($method = null)
diff --git a/src/Illuminate/Routing/Console/ControllerMakeCommand.php b/src/Illuminate/Routing/Console/ControllerMakeCommand.php
index 6ba0a38863bc..87f3942efe6b 100755
--- a/src/Illuminate/Routing/Console/ControllerMakeCommand.php
+++ b/src/Illuminate/Routing/Console/ControllerMakeCommand.php
@@ -25,7 +25,7 @@ class ControllerMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Routing/Console/MiddlewareMakeCommand.php b/src/Illuminate/Routing/Console/MiddlewareMakeCommand.php
index 11bec0ef98d5..6097c792503b 100644
--- a/src/Illuminate/Routing/Console/MiddlewareMakeCommand.php
+++ b/src/Illuminate/Routing/Console/MiddlewareMakeCommand.php
@@ -23,7 +23,7 @@ class MiddlewareMakeCommand extends GeneratorCommand
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Routing/ImplicitRouteBinding.php b/src/Illuminate/Routing/ImplicitRouteBinding.php
index d9978af3193a..ba9d4aa9a3ac 100644
--- a/src/Illuminate/Routing/ImplicitRouteBinding.php
+++ b/src/Illuminate/Routing/ImplicitRouteBinding.php
@@ -103,7 +103,7 @@ protected static function resolveBackedEnumsForRoute($route, $parameters)
      *
      * @param  string  $name
      * @param  array  $parameters
-     * @return string|null
+     * @return ?string
      */
     protected static function getParameterName($name, $parameters)
     {
diff --git a/src/Illuminate/Routing/Middleware/ValidateSignature.php b/src/Illuminate/Routing/Middleware/ValidateSignature.php
index 63841b28ce08..2a3b160a0400 100644
--- a/src/Illuminate/Routing/Middleware/ValidateSignature.php
+++ b/src/Illuminate/Routing/Middleware/ValidateSignature.php
@@ -21,7 +21,7 @@ class ValidateSignature
      *
      * @param  \Illuminate\Http\Request  $request
      * @param  \Closure  $next
-     * @param  string|null  $relative
+     * @param  ?string  $relative
      * @return \Illuminate\Http\Response
      *
      * @throws \Illuminate\Routing\Exceptions\InvalidSignatureException
diff --git a/src/Illuminate/Routing/Redirector.php b/src/Illuminate/Routing/Redirector.php
index 362e288a3ecc..f7edc7e8990b 100755
--- a/src/Illuminate/Routing/Redirector.php
+++ b/src/Illuminate/Routing/Redirector.php
@@ -254,7 +254,7 @@ public function setSession(SessionStore $session)
     /**
      * Get the "intended" URL from the session.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getIntendedUrl()
     {
diff --git a/src/Illuminate/Routing/ResponseFactory.php b/src/Illuminate/Routing/ResponseFactory.php
index 33ea06f937af..94cef5c9ed44 100644
--- a/src/Illuminate/Routing/ResponseFactory.php
+++ b/src/Illuminate/Routing/ResponseFactory.php
@@ -133,9 +133,9 @@ public function stream($callback, $status = 200, array $headers = [])
      * Create a new streamed response instance as a file download.
      *
      * @param  callable  $callback
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $headers
-     * @param  string|null  $disposition
+     * @param  ?string  $disposition
      * @return \Symfony\Component\HttpFoundation\StreamedResponse
      */
     public function streamDownload($callback, $name = null, array $headers = [], $disposition = 'attachment')
@@ -165,9 +165,9 @@ public function streamDownload($callback, $name = null, array $headers = [], $di
      * Create a new file download response.
      *
      * @param  \SplFileInfo|string  $file
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  array  $headers
-     * @param  string|null  $disposition
+     * @param  ?string  $disposition
      * @return \Symfony\Component\HttpFoundation\BinaryFileResponse
      */
     public function download($file, $name = null, array $headers = [], $disposition = 'attachment')
diff --git a/src/Illuminate/Routing/Route.php b/src/Illuminate/Routing/Route.php
index f14f769e2108..5d93a4fc72fa 100755
--- a/src/Illuminate/Routing/Route.php
+++ b/src/Illuminate/Routing/Route.php
@@ -415,8 +415,8 @@ public function parameter($name, $default = null)
      * Get original value of a given parameter from the route.
      *
      * @param  string  $name
-     * @param  string|null  $default
-     * @return string|null
+     * @param  ?string  $default
+     * @return ?string
      */
     public function originalParameter($name, $default = null)
     {
@@ -537,7 +537,7 @@ public function signatureParameters($conditions = [])
      * Get the binding field for the given parameter.
      *
      * @param  string|int  $parameter
-     * @return string|null
+     * @return ?string
      */
     public function bindingFieldFor($parameter)
     {
@@ -640,7 +640,7 @@ public function setDefaults(array $defaults)
      * Set a regular expression requirement on the route.
      *
      * @param  array|string  $name
-     * @param  string|null  $expression
+     * @param  ?string  $expression
      * @return $this
      */
     public function where($name, $expression = null)
@@ -747,7 +747,7 @@ public function secure()
     /**
      * Get or set the domain for the route.
      *
-     * @param  string|null  $domain
+     * @param  ?string  $domain
      * @return $this|string|null
      */
     public function domain($domain = null)
@@ -770,7 +770,7 @@ public function domain($domain = null)
     /**
      * Get the domain defined for the route.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getDomain()
     {
@@ -781,7 +781,7 @@ public function getDomain()
     /**
      * Get the prefix of the route instance.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getPrefix()
     {
@@ -859,7 +859,7 @@ protected function parseUri($uri)
     /**
      * Get the name of the route instance.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getName()
     {
@@ -960,7 +960,7 @@ public function getActionMethod()
     /**
      * Get the action array or one of its properties for the route.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     public function getAction($key = null)
diff --git a/src/Illuminate/Routing/RouteCollection.php b/src/Illuminate/Routing/RouteCollection.php
index 7e6f98bca055..7c0a7caf6a93 100644
--- a/src/Illuminate/Routing/RouteCollection.php
+++ b/src/Illuminate/Routing/RouteCollection.php
@@ -165,7 +165,7 @@ public function match(Request $request)
     /**
      * Get routes from the collection by method.
      *
-     * @param  string|null  $method
+     * @param  ?string  $method
      * @return \Illuminate\Routing\Route[]
      */
     public function get($method = null)
diff --git a/src/Illuminate/Routing/RouteCollectionInterface.php b/src/Illuminate/Routing/RouteCollectionInterface.php
index 8e25d0fa1056..ceaca658bb6e 100644
--- a/src/Illuminate/Routing/RouteCollectionInterface.php
+++ b/src/Illuminate/Routing/RouteCollectionInterface.php
@@ -46,7 +46,7 @@ public function match(Request $request);
     /**
      * Get routes from the collection by method.
      *
-     * @param  string|null  $method
+     * @param  ?string  $method
      * @return \Illuminate\Routing\Route[]
      */
     public function get($method = null);
diff --git a/src/Illuminate/Routing/RouteGroup.php b/src/Illuminate/Routing/RouteGroup.php
index 28e05d55dd56..7b58ea4320f1 100644
--- a/src/Illuminate/Routing/RouteGroup.php
+++ b/src/Illuminate/Routing/RouteGroup.php
@@ -40,7 +40,7 @@ public static function merge($new, $old, $prependExistingPrefix = true)
      *
      * @param  array  $new
      * @param  array  $old
-     * @return string|null
+     * @return ?string
      */
     protected static function formatNamespace($new, $old)
     {
@@ -59,7 +59,7 @@ protected static function formatNamespace($new, $old)
      * @param  array  $new
      * @param  array  $old
      * @param  bool  $prependExistingPrefix
-     * @return string|null
+     * @return ?string
      */
     protected static function formatPrefix($new, $old, $prependExistingPrefix = true)
     {
diff --git a/src/Illuminate/Routing/RouteRegistrar.php b/src/Illuminate/Routing/RouteRegistrar.php
index 65d454c70d8e..890149df0644 100644
--- a/src/Illuminate/Routing/RouteRegistrar.php
+++ b/src/Illuminate/Routing/RouteRegistrar.php
@@ -21,7 +21,7 @@
  * @method \Illuminate\Routing\RouteRegistrar domain(string $value)
  * @method \Illuminate\Routing\RouteRegistrar middleware(array|string|null $middleware)
  * @method \Illuminate\Routing\RouteRegistrar name(string $value)
- * @method \Illuminate\Routing\RouteRegistrar namespace(string|null $value)
+ * @method \Illuminate\Routing\RouteRegistrar namespace(?string $value)
  * @method \Illuminate\Routing\RouteRegistrar prefix(string $prefix)
  * @method \Illuminate\Routing\RouteRegistrar scopeBindings()
  * @method \Illuminate\Routing\RouteRegistrar where(array $where)
diff --git a/src/Illuminate/Routing/Router.php b/src/Illuminate/Routing/Router.php
index e2fb7420c4d8..d7060db24270 100644
--- a/src/Illuminate/Routing/Router.php
+++ b/src/Illuminate/Routing/Router.php
@@ -1209,7 +1209,7 @@ public function getGroupStack()
      * Get a route parameter for the current route.
      *
      * @param  string  $key
-     * @param  string|null  $default
+     * @param  ?string  $default
      * @return mixed
      */
     public function input($key, $default = null)
@@ -1269,7 +1269,7 @@ public function has($name)
     /**
      * Get the current route name.
      *
-     * @return string|null
+     * @return ?string
      */
     public function currentRouteName()
     {
@@ -1301,7 +1301,7 @@ public function currentRouteNamed(...$patterns)
     /**
      * Get the current route action.
      *
-     * @return string|null
+     * @return ?string
      */
     public function currentRouteAction()
     {
diff --git a/src/Illuminate/Routing/UrlGenerator.php b/src/Illuminate/Routing/UrlGenerator.php
index 56a116d405a2..d67af818ab40 100755
--- a/src/Illuminate/Routing/UrlGenerator.php
+++ b/src/Illuminate/Routing/UrlGenerator.php
@@ -57,14 +57,14 @@ class UrlGenerator implements UrlGeneratorContract
     /**
      * A cached copy of the URL root for the current request.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $cachedRoot;
 
     /**
      * A cached copy of the URL scheme for the current request.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $cachedScheme;
 
@@ -115,7 +115,7 @@ class UrlGenerator implements UrlGeneratorContract
      *
      * @param  \Illuminate\Routing\RouteCollectionInterface  $routes
      * @param  \Illuminate\Http\Request  $request
-     * @param  string|null  $assetRoot
+     * @param  ?string  $assetRoot
      * @return void
      */
     public function __construct(RouteCollectionInterface $routes, Request $request, $assetRoot = null)
@@ -183,7 +183,7 @@ public function previousPath($fallback = false)
     /**
      * Get the previous URL from the session if possible.
      *
-     * @return string|null
+     * @return ?string
      */
     protected function getPreviousUrlFromSession()
     {
@@ -573,7 +573,7 @@ protected function extractQueryString($path)
      * Get the base URL for the request.
      *
      * @param  string  $scheme
-     * @param  string|null  $root
+     * @param  ?string  $root
      * @return string
      */
     public function formatRoot($scheme, $root = null)
@@ -667,7 +667,7 @@ public function getDefaultParameters()
     /**
      * Force the scheme for URLs.
      *
-     * @param  string|null  $scheme
+     * @param  ?string  $scheme
      * @return void
      */
     public function forceScheme($scheme)
@@ -680,7 +680,7 @@ public function forceScheme($scheme)
     /**
      * Set the forced root URL.
      *
-     * @param  string|null  $root
+     * @param  ?string  $root
      * @return void
      */
     public function forceRootUrl($root)
diff --git a/src/Illuminate/Session/Console/SessionTableCommand.php b/src/Illuminate/Session/Console/SessionTableCommand.php
index e44b2da71238..5d1f9b6acde3 100644
--- a/src/Illuminate/Session/Console/SessionTableCommand.php
+++ b/src/Illuminate/Session/Console/SessionTableCommand.php
@@ -22,7 +22,7 @@ class SessionTableCommand extends Command
      *
      * This name is used to identify the command during lazy loading.
      *
-     * @var string|null
+     * @var ?string
      *
      * @deprecated
      */
diff --git a/src/Illuminate/Session/EncryptedStore.php b/src/Illuminate/Session/EncryptedStore.php
index b8ae8cfaf34d..54ff822b25e2 100644
--- a/src/Illuminate/Session/EncryptedStore.php
+++ b/src/Illuminate/Session/EncryptedStore.php
@@ -21,7 +21,7 @@ class EncryptedStore extends Store
      * @param  string  $name
      * @param  \SessionHandlerInterface  $handler
      * @param  \Illuminate\Contracts\Encryption\Encrypter  $encrypter
-     * @param  string|null  $id
+     * @param  ?string  $id
      * @param  string  $serialization
      * @return void
      */
diff --git a/src/Illuminate/Session/SessionManager.php b/src/Illuminate/Session/SessionManager.php
index a12d6ad026a3..f142831287d5 100755
--- a/src/Illuminate/Session/SessionManager.php
+++ b/src/Illuminate/Session/SessionManager.php
@@ -227,7 +227,7 @@ public function shouldBlock()
     /**
      * Get the name of the cache store / driver that should be used to acquire session locks.
      *
-     * @return string|null
+     * @return ?string
      */
     public function blockDriver()
     {
diff --git a/src/Illuminate/Session/Store.php b/src/Illuminate/Session/Store.php
index b78b54c8499d..1ddb42ee1db3 100755
--- a/src/Illuminate/Session/Store.php
+++ b/src/Illuminate/Session/Store.php
@@ -63,7 +63,7 @@ class Store implements Session
      *
      * @param  string  $name
      * @param  \SessionHandlerInterface  $handler
-     * @param  string|null  $id
+     * @param  ?string  $id
      * @param  string  $serialization
      * @return void
      */
@@ -311,7 +311,7 @@ public function pull($key, $default = null)
     /**
      * Determine if the session contains old input.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return bool
      */
     public function hasOldInput($key = null)
@@ -324,7 +324,7 @@ public function hasOldInput($key = null)
     /**
      * Get the requested item from the flashed input array.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed
      */
@@ -697,7 +697,7 @@ public function regenerateToken()
     /**
      * Get the previous URL from the session.
      *
-     * @return string|null
+     * @return ?string
      */
     public function previousUrl()
     {
diff --git a/src/Illuminate/Support/Composer.php b/src/Illuminate/Support/Composer.php
index 9933615cb3b2..677cb8bbe60a 100644
--- a/src/Illuminate/Support/Composer.php
+++ b/src/Illuminate/Support/Composer.php
@@ -18,7 +18,7 @@ class Composer
     /**
      * The working path to regenerate from.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $workingPath;
 
@@ -26,7 +26,7 @@ class Composer
      * Create a new Composer manager instance.
      *
      * @param  \Illuminate\Filesystem\Filesystem  $files
-     * @param  string|null  $workingPath
+     * @param  ?string  $workingPath
      * @return void
      */
     public function __construct(Filesystem $files, $workingPath = null)
@@ -111,7 +111,7 @@ public function setWorkingPath($path)
     /**
      * Get the version of Composer.
      *
-     * @return string|null
+     * @return ?string
      */
     public function getVersion()
     {
diff --git a/src/Illuminate/Support/ConfigurationUrlParser.php b/src/Illuminate/Support/ConfigurationUrlParser.php
index a1b933709236..956427b4679a 100644
--- a/src/Illuminate/Support/ConfigurationUrlParser.php
+++ b/src/Illuminate/Support/ConfigurationUrlParser.php
@@ -74,7 +74,7 @@ protected function getPrimaryOptions($url)
      * Get the database driver from the URL.
      *
      * @param  array  $url
-     * @return string|null
+     * @return ?string
      */
     protected function getDriver($url)
     {
@@ -91,7 +91,7 @@ protected function getDriver($url)
      * Get the database name from the URL.
      *
      * @param  array  $url
-     * @return string|null
+     * @return ?string
      */
     protected function getDatabase($url)
     {
diff --git a/src/Illuminate/Support/Facades/App.php b/src/Illuminate/Support/Facades/App.php
index dee1dbb98675..0606416fda6c 100755
--- a/src/Illuminate/Support/Facades/App.php
+++ b/src/Illuminate/Support/Facades/App.php
@@ -43,7 +43,7 @@
  * @method static \Illuminate\Support\ServiceProvider resolveProvider(string $provider)
  * @method static void loadDeferredProviders()
  * @method static void loadDeferredProvider(string $service)
- * @method static void registerDeferredProvider(string $provider, string|null $service = null)
+ * @method static void registerDeferredProvider(string $provider, ?string $service = null)
  * @method static mixed make(string $abstract, array $parameters = [])
  * @method static bool bound(string $abstract)
  * @method static bool isBooted()
@@ -104,7 +104,7 @@
  * @method static mixed rebinding(string $abstract, \Closure $callback)
  * @method static mixed refresh(string $abstract, mixed $target, string $method)
  * @method static \Closure wrap(\Closure $callback, array $parameters = [])
- * @method static mixed call(callable|string $callback, array $parameters = [], string|null $defaultMethod = null)
+ * @method static mixed call(callable|string $callback, array $parameters = [], ?string $defaultMethod = null)
  * @method static \Closure factory(string $abstract)
  * @method static mixed makeWith(string|callable $abstract, array $parameters = [])
  * @method static mixed get(string $id)
diff --git a/src/Illuminate/Support/Facades/Auth.php b/src/Illuminate/Support/Facades/Auth.php
index fd5ac5138aeb..5b9917bbcdb9 100755
--- a/src/Illuminate/Support/Facades/Auth.php
+++ b/src/Illuminate/Support/Facades/Auth.php
@@ -6,7 +6,7 @@
 use RuntimeException;
 
 /**
- * @method static \Illuminate\Contracts\Auth\Guard|\Illuminate\Contracts\Auth\StatefulGuard guard(string|null $name = null)
+ * @method static \Illuminate\Contracts\Auth\Guard|\Illuminate\Contracts\Auth\StatefulGuard guard(?string $name = null)
  * @method static \Illuminate\Auth\SessionGuard createSessionDriver(string $name, array $config)
  * @method static \Illuminate\Auth\TokenGuard createTokenDriver(string $name, array $config)
  * @method static string getDefaultDriver()
@@ -20,7 +20,7 @@
  * @method static bool hasResolvedGuards()
  * @method static \Illuminate\Auth\AuthManager forgetGuards()
  * @method static \Illuminate\Auth\AuthManager setApplication(\Illuminate\Contracts\Foundation\Application $app)
- * @method static \Illuminate\Contracts\Auth\UserProvider|null createUserProvider(string|null $provider = null)
+ * @method static \Illuminate\Contracts\Auth\UserProvider|null createUserProvider(?string $provider = null)
  * @method static string getDefaultUserProvider()
  * @method static bool check()
  * @method static bool guest()
diff --git a/src/Illuminate/Support/Facades/Blade.php b/src/Illuminate/Support/Facades/Blade.php
index a58b2142a956..3bea2cf130a3 100755
--- a/src/Illuminate/Support/Facades/Blade.php
+++ b/src/Illuminate/Support/Facades/Blade.php
@@ -3,7 +3,7 @@
 namespace Illuminate\Support\Facades;
 
 /**
- * @method static void compile(string|null $path = null)
+ * @method static void compile(?string $path = null)
  * @method static string getPath()
  * @method static void setPath(string $path)
  * @method static string compileString(string $value)
@@ -14,18 +14,18 @@
  * @method static array getExtensions()
  * @method static void if(string $name, callable $callback)
  * @method static bool check(string $name, array ...$parameters)
- * @method static void component(string $class, string|null $alias = null, string $prefix = '')
+ * @method static void component(string $class, ?string $alias = null, string $prefix = '')
  * @method static void components(array $components, string $prefix = '')
  * @method static array getClassComponentAliases()
- * @method static void anonymousComponentPath(string $path, string|null $prefix = null)
- * @method static void anonymousComponentNamespace(string $directory, string|null $prefix = null)
+ * @method static void anonymousComponentPath(string $path, ?string $prefix = null)
+ * @method static void anonymousComponentNamespace(string $directory, ?string $prefix = null)
  * @method static void componentNamespace(string $namespace, string $prefix)
  * @method static array getAnonymousComponentPaths()
  * @method static array getAnonymousComponentNamespaces()
  * @method static array getClassComponentNamespaces()
- * @method static void aliasComponent(string $path, string|null $alias = null)
- * @method static void include(string $path, string|null $alias = null)
- * @method static void aliasInclude(string $path, string|null $alias = null)
+ * @method static void aliasComponent(string $path, ?string $alias = null)
+ * @method static void include(string $path, ?string $alias = null)
+ * @method static void aliasInclude(string $path, ?string $alias = null)
  * @method static void directive(string $name, callable $handler)
  * @method static array getCustomDirectives()
  * @method static void precompiler(callable $precompiler)
diff --git a/src/Illuminate/Support/Facades/Broadcast.php b/src/Illuminate/Support/Facades/Broadcast.php
index aca0eac88c90..6c4e3f2970bd 100644
--- a/src/Illuminate/Support/Facades/Broadcast.php
+++ b/src/Illuminate/Support/Facades/Broadcast.php
@@ -8,16 +8,16 @@
  * @method static void routes(array|null $attributes = null)
  * @method static void userRoutes(array|null $attributes = null)
  * @method static void channelRoutes(array|null $attributes = null)
- * @method static string|null socket(\Illuminate\Http\Request|null $request = null)
+ * @method static ?string socket(\Illuminate\Http\Request|null $request = null)
  * @method static \Illuminate\Broadcasting\PendingBroadcast event(mixed|null $event = null)
  * @method static void queue(mixed $event)
- * @method static mixed connection(string|null $driver = null)
- * @method static mixed driver(string|null $name = null)
+ * @method static mixed connection(?string $driver = null)
+ * @method static mixed driver(?string $name = null)
  * @method static \Pusher\Pusher pusher(array $config)
  * @method static \Ably\AblyRest ably(array $config)
  * @method static string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
- * @method static void purge(string|null $name = null)
+ * @method static void purge(?string $name = null)
  * @method static \Illuminate\Broadcasting\BroadcastManager extend(string $driver, \Closure $callback)
  * @method static \Illuminate\Contracts\Foundation\Application getApplication()
  * @method static \Illuminate\Broadcasting\BroadcastManager setApplication(\Illuminate\Contracts\Foundation\Application $app)
diff --git a/src/Illuminate/Support/Facades/Cache.php b/src/Illuminate/Support/Facades/Cache.php
index e49c1eb35da3..671151ee87a5 100755
--- a/src/Illuminate/Support/Facades/Cache.php
+++ b/src/Illuminate/Support/Facades/Cache.php
@@ -3,14 +3,14 @@
 namespace Illuminate\Support\Facades;
 
 /**
- * @method static \Illuminate\Contracts\Cache\Repository store(string|null $name = null)
- * @method static \Illuminate\Contracts\Cache\Repository driver(string|null $driver = null)
+ * @method static \Illuminate\Contracts\Cache\Repository store(?string $name = null)
+ * @method static \Illuminate\Contracts\Cache\Repository driver(?string $driver = null)
  * @method static \Illuminate\Cache\Repository repository(\Illuminate\Contracts\Cache\Store $store)
  * @method static void refreshEventDispatcher()
  * @method static string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
  * @method static \Illuminate\Cache\CacheManager forgetDriver(array|string|null $name = null)
- * @method static void purge(string|null $name = null)
+ * @method static void purge(?string $name = null)
  * @method static \Illuminate\Cache\CacheManager extend(string $driver, \Closure $callback)
  * @method static bool has(array|string $key)
  * @method static bool missing(string $key)
@@ -47,7 +47,7 @@
  * @method static mixed macroCall(string $method, array $parameters)
  * @method static bool flush()
  * @method static string getPrefix()
- * @method static \Illuminate\Contracts\Cache\Lock lock(string $name, int $seconds = 0, string|null $owner = null)
+ * @method static \Illuminate\Contracts\Cache\Lock lock(string $name, int $seconds = 0, ?string $owner = null)
  * @method static \Illuminate\Contracts\Cache\Lock restoreLock(string $name, string $owner)
  *
  * @see \Illuminate\Cache\CacheManager
diff --git a/src/Illuminate/Support/Facades/Cookie.php b/src/Illuminate/Support/Facades/Cookie.php
index 3592f5839e74..538e3efddb75 100755
--- a/src/Illuminate/Support/Facades/Cookie.php
+++ b/src/Illuminate/Support/Facades/Cookie.php
@@ -3,15 +3,15 @@
 namespace Illuminate\Support\Facades;
 
 /**
- * @method static \Symfony\Component\HttpFoundation\Cookie make(string $name, string $value, int $minutes = 0, string|null $path = null, string|null $domain = null, bool|null $secure = null, bool $httpOnly = true, bool $raw = false, string|null $sameSite = null)
- * @method static \Symfony\Component\HttpFoundation\Cookie forever(string $name, string $value, string|null $path = null, string|null $domain = null, bool|null $secure = null, bool $httpOnly = true, bool $raw = false, string|null $sameSite = null)
- * @method static \Symfony\Component\HttpFoundation\Cookie forget(string $name, string|null $path = null, string|null $domain = null)
- * @method static bool hasQueued(string $key, string|null $path = null)
- * @method static \Symfony\Component\HttpFoundation\Cookie|null queued(string $key, mixed $default = null, string|null $path = null)
+ * @method static \Symfony\Component\HttpFoundation\Cookie make(string $name, string $value, int $minutes = 0, ?string $path = null, ?string $domain = null, bool|null $secure = null, bool $httpOnly = true, bool $raw = false, ?string $sameSite = null)
+ * @method static \Symfony\Component\HttpFoundation\Cookie forever(string $name, string $value, ?string $path = null, ?string $domain = null, bool|null $secure = null, bool $httpOnly = true, bool $raw = false, ?string $sameSite = null)
+ * @method static \Symfony\Component\HttpFoundation\Cookie forget(string $name, ?string $path = null, ?string $domain = null)
+ * @method static bool hasQueued(string $key, ?string $path = null)
+ * @method static \Symfony\Component\HttpFoundation\Cookie|null queued(string $key, mixed $default = null, ?string $path = null)
  * @method static void queue(mixed ...$parameters)
- * @method static void expire(string $name, string|null $path = null, string|null $domain = null)
- * @method static void unqueue(string $name, string|null $path = null)
- * @method static \Illuminate\Cookie\CookieJar setDefaultPathAndDomain(string $path, string|null $domain, bool|null $secure = false, string|null $sameSite = null)
+ * @method static void expire(string $name, ?string $path = null, ?string $domain = null)
+ * @method static void unqueue(string $name, ?string $path = null)
+ * @method static \Illuminate\Cookie\CookieJar setDefaultPathAndDomain(string $path, ?string $domain, bool|null $secure = false, ?string $sameSite = null)
  * @method static \Symfony\Component\HttpFoundation\Cookie[] getQueuedCookies()
  * @method static \Illuminate\Cookie\CookieJar flushQueuedCookies()
  * @method static void macro(string $name, object|callable $macro)
@@ -37,7 +37,7 @@ public static function has($key)
     /**
      * Retrieve a cookie from the request.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return string|array|null
      */
diff --git a/src/Illuminate/Support/Facades/DB.php b/src/Illuminate/Support/Facades/DB.php
index ed5b13e7cab0..0660a4d6aa81 100755
--- a/src/Illuminate/Support/Facades/DB.php
+++ b/src/Illuminate/Support/Facades/DB.php
@@ -3,11 +3,11 @@
 namespace Illuminate\Support\Facades;
 
 /**
- * @method static \Illuminate\Database\Connection connection(string|null $name = null)
+ * @method static \Illuminate\Database\Connection connection(?string $name = null)
  * @method static void registerDoctrineType(string $class, string $name, string $type)
- * @method static void purge(string|null $name = null)
- * @method static void disconnect(string|null $name = null)
- * @method static \Illuminate\Database\Connection reconnect(string|null $name = null)
+ * @method static void purge(?string $name = null)
+ * @method static void disconnect(?string $name = null)
+ * @method static \Illuminate\Database\Connection reconnect(?string $name = null)
  * @method static mixed usingConnection(string $name, callable $callback)
  * @method static string getDefaultConnection()
  * @method static void setDefaultConnection(string $name)
@@ -27,7 +27,7 @@
  * @method static void useDefaultSchemaGrammar()
  * @method static void useDefaultPostProcessor()
  * @method static \Illuminate\Database\Schema\Builder getSchemaBuilder()
- * @method static \Illuminate\Database\Query\Builder table(\Closure|\Illuminate\Database\Query\Builder|string $table, string|null $as = null)
+ * @method static \Illuminate\Database\Query\Builder table(\Closure|\Illuminate\Database\Query\Builder|string $table, ?string $as = null)
  * @method static \Illuminate\Database\Query\Builder query()
  * @method static mixed selectOne(string $query, array $bindings = [], bool $useReadPdo = true)
  * @method static mixed scalar(string $query, array $bindings = [], bool $useReadPdo = true)
@@ -67,9 +67,9 @@
  * @method static \PDO|\Closure|null getRawReadPdo()
  * @method static \Illuminate\Database\Connection setPdo(\PDO|\Closure|null $pdo)
  * @method static \Illuminate\Database\Connection setReadPdo(\PDO|\Closure|null $pdo)
- * @method static string|null getName()
- * @method static string|null getNameWithReadWriteType()
- * @method static mixed getConfig(string|null $option = null)
+ * @method static ?string getName()
+ * @method static ?string getNameWithReadWriteType()
+ * @method static mixed getConfig(?string $option = null)
  * @method static string getDriverName()
  * @method static \Illuminate\Database\Query\Grammars\Grammar getQueryGrammar()
  * @method static \Illuminate\Database\Connection setQueryGrammar(\Illuminate\Database\Query\Grammars\Grammar $grammar)
@@ -90,7 +90,7 @@
  * @method static bool logging()
  * @method static string getDatabaseName()
  * @method static \Illuminate\Database\Connection setDatabaseName(string $database)
- * @method static \Illuminate\Database\Connection setReadWriteType(string|null $readWriteType)
+ * @method static \Illuminate\Database\Connection setReadWriteType(?string $readWriteType)
  * @method static string getTablePrefix()
  * @method static \Illuminate\Database\Connection setTablePrefix(string $prefix)
  * @method static \Illuminate\Database\Grammar withTablePrefix(\Illuminate\Database\Grammar $grammar)
diff --git a/src/Illuminate/Support/Facades/Facade.php b/src/Illuminate/Support/Facades/Facade.php
index 219e599be2e9..26a7317bda29 100755
--- a/src/Illuminate/Support/Facades/Facade.php
+++ b/src/Illuminate/Support/Facades/Facade.php
@@ -159,7 +159,7 @@ protected static function isMock()
     /**
      * Get the mockable class for the bound instance.
      *
-     * @return string|null
+     * @return ?string
      */
     protected static function getMockableClass()
     {
diff --git a/src/Illuminate/Support/Facades/File.php b/src/Illuminate/Support/Facades/File.php
index a5a1a60dfacf..54938ee65dd2 100755
--- a/src/Illuminate/Support/Facades/File.php
+++ b/src/Illuminate/Support/Facades/File.php
@@ -26,7 +26,7 @@
  * @method static string basename(string $path)
  * @method static string dirname(string $path)
  * @method static string extension(string $path)
- * @method static string|null guessExtension(string $path)
+ * @method static ?string guessExtension(string $path)
  * @method static string type(string $path)
  * @method static string|false mimeType(string $path)
  * @method static int size(string $path)
diff --git a/src/Illuminate/Support/Facades/Gate.php b/src/Illuminate/Support/Facades/Gate.php
index f4fba393c5e8..310c7a8582eb 100644
--- a/src/Illuminate/Support/Facades/Gate.php
+++ b/src/Illuminate/Support/Facades/Gate.php
@@ -6,8 +6,8 @@
 
 /**
  * @method static bool has(string|array $ability)
- * @method static \Illuminate\Auth\Access\Response allowIf(\Illuminate\Auth\Access\Response|\Closure|bool $condition, string|null $message = null, string|null $code = null)
- * @method static \Illuminate\Auth\Access\Response denyIf(\Illuminate\Auth\Access\Response|\Closure|bool $condition, string|null $message = null, string|null $code = null)
+ * @method static \Illuminate\Auth\Access\Response allowIf(\Illuminate\Auth\Access\Response|\Closure|bool $condition, ?string $message = null, ?string $code = null)
+ * @method static \Illuminate\Auth\Access\Response denyIf(\Illuminate\Auth\Access\Response|\Closure|bool $condition, ?string $message = null, ?string $code = null)
  * @method static \Illuminate\Auth\Access\Gate define(string $ability, callable|array|string $callback)
  * @method static \Illuminate\Auth\Access\Gate resource(string $name, string $class, array|null $abilities = null)
  * @method static \Illuminate\Auth\Access\Gate policy(string $class, string $policy)
diff --git a/src/Illuminate/Support/Facades/Hash.php b/src/Illuminate/Support/Facades/Hash.php
index 1cfe56120e90..e98aaef739e5 100755
--- a/src/Illuminate/Support/Facades/Hash.php
+++ b/src/Illuminate/Support/Facades/Hash.php
@@ -11,7 +11,7 @@
  * @method static bool check(string $value, string $hashedValue, array $options = [])
  * @method static bool needsRehash(string $hashedValue, array $options = [])
  * @method static string getDefaultDriver()
- * @method static mixed driver(string|null $driver = null)
+ * @method static mixed driver(?string $driver = null)
  * @method static \Illuminate\Hashing\HashManager extend(string $driver, \Closure $callback)
  * @method static array getDrivers()
  * @method static \Illuminate\Contracts\Container\Container getContainer()
diff --git a/src/Illuminate/Support/Facades/Http.php b/src/Illuminate/Support/Facades/Http.php
index c35fbdbe2a37..872d41b23e19 100644
--- a/src/Illuminate/Support/Facades/Http.php
+++ b/src/Illuminate/Support/Facades/Http.php
@@ -26,7 +26,7 @@
  * @method static \Illuminate\Http\Client\PendingRequest withBody(string $content, string $contentType)
  * @method static \Illuminate\Http\Client\PendingRequest asJson()
  * @method static \Illuminate\Http\Client\PendingRequest asForm()
- * @method static \Illuminate\Http\Client\PendingRequest attach(string|array $name, string|resource $contents = '', string|null $filename = null, array $headers = [])
+ * @method static \Illuminate\Http\Client\PendingRequest attach(string|array $name, string|resource $contents = '', ?string $filename = null, array $headers = [])
  * @method static \Illuminate\Http\Client\PendingRequest asMultipart()
  * @method static \Illuminate\Http\Client\PendingRequest bodyFormat(string $format)
  * @method static \Illuminate\Http\Client\PendingRequest contentType(string $contentType)
diff --git a/src/Illuminate/Support/Facades/Lang.php b/src/Illuminate/Support/Facades/Lang.php
index a87088a3fd10..4adad58c1659 100755
--- a/src/Illuminate/Support/Facades/Lang.php
+++ b/src/Illuminate/Support/Facades/Lang.php
@@ -3,10 +3,10 @@
 namespace Illuminate\Support\Facades;
 
 /**
- * @method static bool hasForLocale(string $key, string|null $locale = null)
- * @method static bool has(string $key, string|null $locale = null, bool $fallback = true)
- * @method static string|array get(string $key, array $replace = [], string|null $locale = null, bool $fallback = true)
- * @method static string choice(string $key, \Countable|int|array $number, array $replace = [], string|null $locale = null)
+ * @method static bool hasForLocale(string $key, ?string $locale = null)
+ * @method static bool has(string $key, ?string $locale = null, bool $fallback = true)
+ * @method static string|array get(string $key, array $replace = [], ?string $locale = null, bool $fallback = true)
+ * @method static string choice(string $key, \Countable|int|array $number, array $replace = [], ?string $locale = null)
  * @method static void addLines(array $lines, string $locale, string $namespace = '*')
  * @method static void load(string $namespace, string $group, string $locale)
  * @method static void addNamespace(string $namespace, string $hint)
diff --git a/src/Illuminate/Support/Facades/Log.php b/src/Illuminate/Support/Facades/Log.php
index c00fac374b20..4a90569337b1 100755
--- a/src/Illuminate/Support/Facades/Log.php
+++ b/src/Illuminate/Support/Facades/Log.php
@@ -4,16 +4,16 @@
 
 /**
  * @method static \Psr\Log\LoggerInterface build(array $config)
- * @method static \Psr\Log\LoggerInterface stack(array $channels, string|null $channel = null)
- * @method static \Psr\Log\LoggerInterface channel(string|null $channel = null)
- * @method static \Psr\Log\LoggerInterface driver(string|null $driver = null)
+ * @method static \Psr\Log\LoggerInterface stack(array $channels, ?string $channel = null)
+ * @method static \Psr\Log\LoggerInterface channel(?string $channel = null)
+ * @method static \Psr\Log\LoggerInterface driver(?string $driver = null)
  * @method static \Illuminate\Log\LogManager shareContext(array $context)
  * @method static array sharedContext()
  * @method static \Illuminate\Log\LogManager flushSharedContext()
- * @method static string|null getDefaultDriver()
+ * @method static ?string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
  * @method static \Illuminate\Log\LogManager extend(string $driver, \Closure $callback)
- * @method static \Illuminate\Log\LogManager forgetChannel(string|null $driver = null)
+ * @method static \Illuminate\Log\LogManager forgetChannel(?string $driver = null)
  * @method static array getChannels()
  * @method static void emergency(string $message, array $context = [])
  * @method static void alert(string $message, array $context = [])
diff --git a/src/Illuminate/Support/Facades/Mail.php b/src/Illuminate/Support/Facades/Mail.php
index a6544a3a86ef..551d00c6579f 100755
--- a/src/Illuminate/Support/Facades/Mail.php
+++ b/src/Illuminate/Support/Facades/Mail.php
@@ -5,20 +5,20 @@
 use Illuminate\Support\Testing\Fakes\MailFake;
 
 /**
- * @method static \Illuminate\Contracts\Mail\Mailer mailer(string|null $name = null)
- * @method static \Illuminate\Mail\Mailer driver(string|null $driver = null)
+ * @method static \Illuminate\Contracts\Mail\Mailer mailer(?string $name = null)
+ * @method static \Illuminate\Mail\Mailer driver(?string $driver = null)
  * @method static \Symfony\Component\Mailer\Transport\TransportInterface createSymfonyTransport(array $config)
  * @method static string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
- * @method static void purge(string|null $name = null)
+ * @method static void purge(?string $name = null)
  * @method static \Illuminate\Mail\MailManager extend(string $driver, \Closure $callback)
  * @method static \Illuminate\Contracts\Foundation\Application getApplication()
  * @method static \Illuminate\Mail\MailManager setApplication(\Illuminate\Contracts\Foundation\Application $app)
  * @method static \Illuminate\Mail\MailManager forgetMailers()
- * @method static void alwaysFrom(string $address, string|null $name = null)
- * @method static void alwaysReplyTo(string $address, string|null $name = null)
+ * @method static void alwaysFrom(string $address, ?string $name = null)
+ * @method static void alwaysReplyTo(string $address, ?string $name = null)
  * @method static void alwaysReturnPath(string $address)
- * @method static void alwaysTo(string $address, string|null $name = null)
+ * @method static void alwaysTo(string $address, ?string $name = null)
  * @method static \Illuminate\Mail\PendingMail to(mixed $users)
  * @method static \Illuminate\Mail\PendingMail cc(mixed $users)
  * @method static \Illuminate\Mail\PendingMail bcc(mixed $users)
@@ -27,10 +27,10 @@
  * @method static \Illuminate\Mail\SentMessage|null plain(string $view, array $data, mixed $callback)
  * @method static string render(string|array $view, array $data = [])
  * @method static \Illuminate\Mail\SentMessage|null send(\Illuminate\Contracts\Mail\Mailable|string|array $view, array $data = [], \Closure|string|null $callback = null)
- * @method static mixed queue(\Illuminate\Contracts\Mail\Mailable|string|array $view, string|null $queue = null)
+ * @method static mixed queue(\Illuminate\Contracts\Mail\Mailable|string|array $view, ?string $queue = null)
  * @method static mixed onQueue(string $queue, \Illuminate\Contracts\Mail\Mailable $view)
  * @method static mixed queueOn(string $queue, \Illuminate\Contracts\Mail\Mailable $view)
- * @method static mixed later(\DateTimeInterface|\DateInterval|int $delay, \Illuminate\Contracts\Mail\Mailable $view, string|null $queue = null)
+ * @method static mixed later(\DateTimeInterface|\DateInterval|int $delay, \Illuminate\Contracts\Mail\Mailable $view, ?string $queue = null)
  * @method static mixed laterOn(string $queue, \DateTimeInterface|\DateInterval|int $delay, \Illuminate\Contracts\Mail\Mailable $view)
  * @method static \Symfony\Component\Mailer\Transport\TransportInterface getSymfonyTransport()
  * @method static \Illuminate\Contracts\View\Factory getViewFactory()
diff --git a/src/Illuminate/Support/Facades/Notification.php b/src/Illuminate/Support/Facades/Notification.php
index 74d56470b581..bdaade233208 100644
--- a/src/Illuminate/Support/Facades/Notification.php
+++ b/src/Illuminate/Support/Facades/Notification.php
@@ -9,12 +9,12 @@
 /**
  * @method static void send(\Illuminate\Support\Collection|array|mixed $notifiables, mixed $notification)
  * @method static void sendNow(\Illuminate\Support\Collection|array|mixed $notifiables, mixed $notification, array|null $channels = null)
- * @method static mixed channel(string|null $name = null)
+ * @method static mixed channel(?string $name = null)
  * @method static string getDefaultDriver()
  * @method static string deliversVia()
  * @method static void deliverVia(string $channel)
  * @method static \Illuminate\Notifications\ChannelManager locale(string $locale)
- * @method static mixed driver(string|null $driver = null)
+ * @method static mixed driver(?string $driver = null)
  * @method static \Illuminate\Notifications\ChannelManager extend(string $driver, \Closure $callback)
  * @method static array getDrivers()
  * @method static \Illuminate\Contracts\Container\Container getContainer()
diff --git a/src/Illuminate/Support/Facades/Password.php b/src/Illuminate/Support/Facades/Password.php
index 87d9daf6fb11..b187d543858d 100755
--- a/src/Illuminate/Support/Facades/Password.php
+++ b/src/Illuminate/Support/Facades/Password.php
@@ -5,7 +5,7 @@
 use Illuminate\Contracts\Auth\PasswordBroker;
 
 /**
- * @method static \Illuminate\Contracts\Auth\PasswordBroker broker(string|null $name = null)
+ * @method static \Illuminate\Contracts\Auth\PasswordBroker broker(?string $name = null)
  * @method static string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
  * @method static string sendResetLink(array $credentials, \Closure|null $callback = null)
diff --git a/src/Illuminate/Support/Facades/Queue.php b/src/Illuminate/Support/Facades/Queue.php
index 60fc5fe7bb9f..149efbb7dfb3 100755
--- a/src/Illuminate/Support/Facades/Queue.php
+++ b/src/Illuminate/Support/Facades/Queue.php
@@ -12,23 +12,23 @@
  * @method static void looping(mixed $callback)
  * @method static void failing(mixed $callback)
  * @method static void stopping(mixed $callback)
- * @method static bool connected(string|null $name = null)
- * @method static \Illuminate\Contracts\Queue\Queue connection(string|null $name = null)
+ * @method static bool connected(?string $name = null)
+ * @method static \Illuminate\Contracts\Queue\Queue connection(?string $name = null)
  * @method static void extend(string $driver, \Closure $resolver)
  * @method static void addConnector(string $driver, \Closure $resolver)
  * @method static string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
- * @method static string getName(string|null $connection = null)
+ * @method static string getName(?string $connection = null)
  * @method static \Illuminate\Contracts\Foundation\Application getApplication()
  * @method static \Illuminate\Queue\QueueManager setApplication(\Illuminate\Contracts\Foundation\Application $app)
- * @method static int size(string|null $queue = null)
- * @method static mixed push(string|object $job, mixed $data = '', string|null $queue = null)
+ * @method static int size(?string $queue = null)
+ * @method static mixed push(string|object $job, mixed $data = '', ?string $queue = null)
  * @method static mixed pushOn(string $queue, string|object $job, mixed $data = '')
- * @method static mixed pushRaw(string $payload, string|null $queue = null, array $options = [])
- * @method static mixed later(\DateTimeInterface|\DateInterval|int $delay, string|object $job, mixed $data = '', string|null $queue = null)
+ * @method static mixed pushRaw(string $payload, ?string $queue = null, array $options = [])
+ * @method static mixed later(\DateTimeInterface|\DateInterval|int $delay, string|object $job, mixed $data = '', ?string $queue = null)
  * @method static mixed laterOn(string $queue, \DateTimeInterface|\DateInterval|int $delay, string|object $job, mixed $data = '')
- * @method static mixed bulk(array $jobs, mixed $data = '', string|null $queue = null)
- * @method static \Illuminate\Contracts\Queue\Job|null pop(string|null $queue = null)
+ * @method static mixed bulk(array $jobs, mixed $data = '', ?string $queue = null)
+ * @method static \Illuminate\Contracts\Queue\Job|null pop(?string $queue = null)
  * @method static string getConnectionName()
  * @method static \Illuminate\Contracts\Queue\Queue setConnectionName(string $name)
  * @method static mixed getJobBackoff(mixed $job)
diff --git a/src/Illuminate/Support/Facades/Redirect.php b/src/Illuminate/Support/Facades/Redirect.php
index ce96f7e8c21b..764e7dc05444 100755
--- a/src/Illuminate/Support/Facades/Redirect.php
+++ b/src/Illuminate/Support/Facades/Redirect.php
@@ -16,7 +16,7 @@
  * @method static \Illuminate\Http\RedirectResponse action(string|array $action, mixed $parameters = [], int $status = 302, array $headers = [])
  * @method static \Illuminate\Routing\UrlGenerator getUrlGenerator()
  * @method static void setSession(\Illuminate\Session\Store $session)
- * @method static string|null getIntendedUrl()
+ * @method static ?string getIntendedUrl()
  * @method static \Illuminate\Routing\Redirector setIntendedUrl(string $url)
  * @method static void macro(string $name, object|callable $macro)
  * @method static void mixin(object $mixin, bool $replace = true)
diff --git a/src/Illuminate/Support/Facades/Redis.php b/src/Illuminate/Support/Facades/Redis.php
index b796ad09d325..b081ac3cc6cf 100755
--- a/src/Illuminate/Support/Facades/Redis.php
+++ b/src/Illuminate/Support/Facades/Redis.php
@@ -3,13 +3,13 @@
 namespace Illuminate\Support\Facades;
 
 /**
- * @method static \Illuminate\Redis\Connections\Connection connection(string|null $name = null)
- * @method static \Illuminate\Redis\Connections\Connection resolve(string|null $name = null)
+ * @method static \Illuminate\Redis\Connections\Connection connection(?string $name = null)
+ * @method static \Illuminate\Redis\Connections\Connection resolve(?string $name = null)
  * @method static array connections()
  * @method static void enableEvents()
  * @method static void disableEvents()
  * @method static void setDriver(string $driver)
- * @method static void purge(string|null $name = null)
+ * @method static void purge(?string $name = null)
  * @method static \Illuminate\Redis\RedisManager extend(string $driver, \Closure $callback)
  * @method static void createSubscription(array|string $channels, \Closure $callback, string $method = 'subscribe')
  * @method static \Illuminate\Redis\Limiters\ConcurrencyLimiterBuilder funnel(string $name)
@@ -19,7 +19,7 @@
  * @method static void psubscribe(array|string $channels, \Closure $callback)
  * @method static mixed command(string $method, array $parameters = [])
  * @method static void listen(\Closure $callback)
- * @method static string|null getName()
+ * @method static ?string getName()
  * @method static \Illuminate\Redis\Connections\Connection setName(string $name)
  * @method static \Illuminate\Contracts\Events\Dispatcher getEventDispatcher()
  * @method static void setEventDispatcher(\Illuminate\Contracts\Events\Dispatcher $events)
diff --git a/src/Illuminate/Support/Facades/Request.php b/src/Illuminate/Support/Facades/Request.php
index b62435dfff1e..4257db5ef7e5 100755
--- a/src/Illuminate/Support/Facades/Request.php
+++ b/src/Illuminate/Support/Facades/Request.php
@@ -13,7 +13,7 @@
  * @method static string fullUrlWithoutQuery(array|string $keys)
  * @method static string path()
  * @method static string decodedPath()
- * @method static string|null segment(int $index, string|null $default = null)
+ * @method static ?string segment(int $index, ?string $default = null)
  * @method static array segments()
  * @method static bool is(mixed ...$patterns)
  * @method static bool routeIs(mixed ...$patterns)
@@ -25,14 +25,14 @@
  * @method static bool pjax()
  * @method static bool prefetch()
  * @method static bool secure()
- * @method static string|null ip()
+ * @method static ?string ip()
  * @method static array ips()
- * @method static string|null userAgent()
+ * @method static ?string userAgent()
  * @method static \Illuminate\Http\Request merge(array $input)
  * @method static \Illuminate\Http\Request mergeIfMissing(array $input)
  * @method static \Illuminate\Http\Request replace(array $input)
  * @method static mixed get(string $key, mixed $default = null)
- * @method static \Symfony\Component\HttpFoundation\ParameterBag|mixed json(string|null $key = null, mixed $default = null)
+ * @method static \Symfony\Component\HttpFoundation\ParameterBag|mixed json(?string $key = null, mixed $default = null)
  * @method static \Illuminate\Http\Request createFrom(\Illuminate\Http\Request $from, \Illuminate\Http\Request|null $to = null)
  * @method static \Illuminate\Http\Request createFromBase(\Symfony\Component\HttpFoundation\Request $request)
  * @method static \Illuminate\Http\Request duplicate(array $query = null, array $request = null, array $attributes = null, array $cookies = null, array $files = null, array $server = null)
@@ -42,8 +42,8 @@
  * @method static void setLaravelSession(\Illuminate\Contracts\Session\Session $session)
  * @method static void setRequestLocale(string $locale)
  * @method static void setDefaultRequestLocale(string $locale)
- * @method static mixed user(string|null $guard = null)
- * @method static \Illuminate\Routing\Route|object|string|null route(string|null $param = null, mixed $default = null)
+ * @method static mixed user(?string $guard = null)
+ * @method static \Illuminate\Routing\Route|object|string|null route(?string $param = null, mixed $default = null)
  * @method static string fingerprint()
  * @method static \Illuminate\Http\Request setJson(\Symfony\Component\HttpFoundation\ParameterBag $json)
  * @method static \Closure getUserResolver()
@@ -61,41 +61,41 @@
  * @method static int getTrustedHeaderSet()
  * @method static void setTrustedHosts(array $hostPatterns)
  * @method static string[] getTrustedHosts()
- * @method static string normalizeQueryString(string|null $qs)
+ * @method static string normalizeQueryString(?string $qs)
  * @method static void enableHttpMethodParameterOverride()
  * @method static bool getHttpMethodParameterOverride()
  * @method static bool hasPreviousSession()
  * @method static void setSession(\Symfony\Component\HttpFoundation\Session\SessionInterface $session)
  * @method static array getClientIps()
- * @method static string|null getClientIp()
+ * @method static ?string getClientIp()
  * @method static string getScriptName()
  * @method static string getPathInfo()
  * @method static string getBasePath()
  * @method static string getBaseUrl()
  * @method static string getScheme()
  * @method static int|string|null getPort()
- * @method static string|null getUser()
- * @method static string|null getPassword()
- * @method static string|null getUserInfo()
+ * @method static ?string getUser()
+ * @method static ?string getPassword()
+ * @method static ?string getUserInfo()
  * @method static string getHttpHost()
  * @method static string getRequestUri()
  * @method static string getSchemeAndHttpHost()
  * @method static string getUri()
  * @method static string getUriForPath(string $path)
  * @method static string getRelativeUriForPath(string $path)
- * @method static string|null getQueryString()
+ * @method static ?string getQueryString()
  * @method static bool isSecure()
  * @method static string getHost()
  * @method static void setMethod(string $method)
  * @method static string getMethod()
  * @method static string getRealMethod()
- * @method static string|null getMimeType(string $format)
+ * @method static ?string getMimeType(string $format)
  * @method static string[] getMimeTypes(string $format)
- * @method static string|null getFormat(string|null $mimeType)
- * @method static void setFormat(string|null $format, string|string[] $mimeTypes)
- * @method static string|null getRequestFormat(string|null $default = 'html')
- * @method static void setRequestFormat(string|null $format)
- * @method static string|null getContentTypeFormat()
+ * @method static ?string getFormat(?string $mimeType)
+ * @method static void setFormat(?string $format, string|string[] $mimeTypes)
+ * @method static ?string getRequestFormat(?string $default = 'html')
+ * @method static void setRequestFormat(?string $format)
+ * @method static ?string getContentTypeFormat()
  * @method static void setDefaultLocale(string $locale)
  * @method static string getDefaultLocale()
  * @method static void setLocale(string $locale)
@@ -104,12 +104,12 @@
  * @method static bool isMethodSafe()
  * @method static bool isMethodIdempotent()
  * @method static bool isMethodCacheable()
- * @method static string|null getProtocolVersion()
+ * @method static ?string getProtocolVersion()
  * @method static string|resource getContent(bool $asResource = false)
  * @method static array getETags()
  * @method static bool isNoCache()
- * @method static string|null getPreferredFormat(string|null $default = 'html')
- * @method static string|null getPreferredLanguage(string[] $locales = null)
+ * @method static ?string getPreferredFormat(?string $default = 'html')
+ * @method static ?string getPreferredLanguage(string[] $locales = null)
  * @method static string[] getLanguages()
  * @method static string[] getCharsets()
  * @method static string[] getEncodings()
@@ -124,21 +124,21 @@
  * @method static bool expectsJson()
  * @method static bool wantsJson()
  * @method static bool accepts(string|array $contentTypes)
- * @method static string|null prefers(string|array $contentTypes)
+ * @method static ?string prefers(string|array $contentTypes)
  * @method static bool acceptsAnyContentType()
  * @method static bool acceptsJson()
  * @method static bool acceptsHtml()
  * @method static bool matchesType(string $actual, string $type)
  * @method static string format(string $default = 'html')
- * @method static string|array|null old(string|null $key = null, \Illuminate\Database\Eloquent\Model|string|array|null $default = null)
+ * @method static string|array|null old(?string $key = null, \Illuminate\Database\Eloquent\Model|string|array|null $default = null)
  * @method static void flash()
  * @method static void flashOnly(array|mixed $keys)
  * @method static void flashExcept(array|mixed $keys)
  * @method static void flush()
- * @method static string|array|null server(string|null $key = null, string|array|null $default = null)
+ * @method static string|array|null server(?string $key = null, string|array|null $default = null)
  * @method static bool hasHeader(string $key)
- * @method static string|array|null header(string|null $key = null, string|array|null $default = null)
- * @method static string|null bearerToken()
+ * @method static string|array|null header(?string $key = null, string|array|null $default = null)
+ * @method static ?string bearerToken()
  * @method static bool exists(string|array $key)
  * @method static bool has(string|array $key)
  * @method static bool hasAny(string|array $keys)
@@ -151,24 +151,24 @@
  * @method static \Illuminate\Http\Request|mixed whenMissing(string $key, callable $callback, callable|null $default = null)
  * @method static array keys()
  * @method static array all(array|mixed|null $keys = null)
- * @method static mixed input(string|null $key = null, mixed $default = null)
+ * @method static mixed input(?string $key = null, mixed $default = null)
  * @method static \Illuminate\Support\Stringable str(string $key, mixed $default = null)
  * @method static \Illuminate\Support\Stringable string(string $key, mixed $default = null)
- * @method static bool boolean(string|null $key = null, bool $default = false)
+ * @method static bool boolean(?string $key = null, bool $default = false)
  * @method static int integer(string $key, int $default = 0)
  * @method static float float(string $key, float $default = 0)
- * @method static \Illuminate\Support\Carbon|null date(string $key, string|null $format = null, string|null $tz = null)
+ * @method static \Illuminate\Support\Carbon|null date(string $key, ?string $format = null, ?string $tz = null)
  * @method static object|null enum(string $key, string $enumClass)
  * @method static \Illuminate\Support\Collection collect(array|string|null $key = null)
  * @method static array only(array|mixed $keys)
  * @method static array except(array|mixed $keys)
- * @method static string|array|null query(string|null $key = null, string|array|null $default = null)
- * @method static string|array|null post(string|null $key = null, string|array|null $default = null)
+ * @method static string|array|null query(?string $key = null, string|array|null $default = null)
+ * @method static string|array|null post(?string $key = null, string|array|null $default = null)
  * @method static bool hasCookie(string $key)
- * @method static string|array|null cookie(string|null $key = null, string|array|null $default = null)
+ * @method static string|array|null cookie(?string $key = null, string|array|null $default = null)
  * @method static array allFiles()
  * @method static bool hasFile(string $key)
- * @method static \Illuminate\Http\UploadedFile|\Illuminate\Http\UploadedFile[]|array|null file(string|null $key = null, mixed $default = null)
+ * @method static \Illuminate\Http\UploadedFile|\Illuminate\Http\UploadedFile[]|array|null file(?string $key = null, mixed $default = null)
  * @method static never dd(mixed ...$keys)
  * @method static \Illuminate\Http\Request dump(mixed $keys = [])
  * @method static void macro(string $name, object|callable $macro)
diff --git a/src/Illuminate/Support/Facades/Response.php b/src/Illuminate/Support/Facades/Response.php
index 6a9d46f2c6db..2a87c51e3cb5 100755
--- a/src/Illuminate/Support/Facades/Response.php
+++ b/src/Illuminate/Support/Facades/Response.php
@@ -11,8 +11,8 @@
  * @method static \Illuminate\Http\JsonResponse json(mixed $data = [], int $status = 200, array $headers = [], int $options = 0)
  * @method static \Illuminate\Http\JsonResponse jsonp(string $callback, mixed $data = [], int $status = 200, array $headers = [], int $options = 0)
  * @method static \Symfony\Component\HttpFoundation\StreamedResponse stream(callable $callback, int $status = 200, array $headers = [])
- * @method static \Symfony\Component\HttpFoundation\StreamedResponse streamDownload(callable $callback, string|null $name = null, array $headers = [], string|null $disposition = 'attachment')
- * @method static \Symfony\Component\HttpFoundation\BinaryFileResponse download(\SplFileInfo|string $file, string|null $name = null, array $headers = [], string|null $disposition = 'attachment')
+ * @method static \Symfony\Component\HttpFoundation\StreamedResponse streamDownload(callable $callback, ?string $name = null, array $headers = [], ?string $disposition = 'attachment')
+ * @method static \Symfony\Component\HttpFoundation\BinaryFileResponse download(\SplFileInfo|string $file, ?string $name = null, array $headers = [], ?string $disposition = 'attachment')
  * @method static \Symfony\Component\HttpFoundation\BinaryFileResponse file(\SplFileInfo|string $file, array $headers = [])
  * @method static \Illuminate\Http\RedirectResponse redirectTo(string $path, int $status = 302, array $headers = [], bool|null $secure = null)
  * @method static \Illuminate\Http\RedirectResponse redirectToRoute(string $route, mixed $parameters = [], int $status = 302, array $headers = [])
diff --git a/src/Illuminate/Support/Facades/Route.php b/src/Illuminate/Support/Facades/Route.php
index 6fdaf6ee11bc..95690dbfe651 100755
--- a/src/Illuminate/Support/Facades/Route.php
+++ b/src/Illuminate/Support/Facades/Route.php
@@ -55,15 +55,15 @@
  * @method static void patterns(array $patterns)
  * @method static bool hasGroupStack()
  * @method static array getGroupStack()
- * @method static mixed input(string $key, string|null $default = null)
+ * @method static mixed input(string $key, ?string $default = null)
  * @method static \Illuminate\Http\Request getCurrentRequest()
  * @method static \Illuminate\Routing\Route|null getCurrentRoute()
  * @method static \Illuminate\Routing\Route|null current()
  * @method static bool has(string|array $name)
- * @method static string|null currentRouteName()
+ * @method static ?string currentRouteName()
  * @method static bool is(mixed ...$patterns)
  * @method static bool currentRouteNamed(mixed ...$patterns)
- * @method static string|null currentRouteAction()
+ * @method static ?string currentRouteAction()
  * @method static bool uses(array ...$patterns)
  * @method static bool currentRouteUses(string $action)
  * @method static void singularResourceParameters(bool $singular = true)
@@ -91,7 +91,7 @@
  * @method static \Illuminate\Routing\RouteRegistrar domain(string $value)
  * @method static \Illuminate\Routing\RouteRegistrar middleware(array|string|null $middleware)
  * @method static \Illuminate\Routing\RouteRegistrar name(string $value)
- * @method static \Illuminate\Routing\RouteRegistrar namespace(string|null $value)
+ * @method static \Illuminate\Routing\RouteRegistrar namespace(?string $value)
  * @method static \Illuminate\Routing\RouteRegistrar prefix(string $prefix)
  * @method static \Illuminate\Routing\RouteRegistrar scopeBindings()
  * @method static \Illuminate\Routing\RouteRegistrar where(array $where)
diff --git a/src/Illuminate/Support/Facades/Schema.php b/src/Illuminate/Support/Facades/Schema.php
index f3084d04d130..70113782ea77 100755
--- a/src/Illuminate/Support/Facades/Schema.php
+++ b/src/Illuminate/Support/Facades/Schema.php
@@ -48,7 +48,7 @@ class Schema extends Facade
     /**
      * Get a schema builder instance for a connection.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Database\Schema\Builder
      */
     public static function connection($name)
diff --git a/src/Illuminate/Support/Facades/Session.php b/src/Illuminate/Support/Facades/Session.php
index a36f61334d2a..217bb29a91e1 100755
--- a/src/Illuminate/Support/Facades/Session.php
+++ b/src/Illuminate/Support/Facades/Session.php
@@ -4,11 +4,11 @@
 
 /**
  * @method static bool shouldBlock()
- * @method static string|null blockDriver()
+ * @method static ?string blockDriver()
  * @method static array getSessionConfig()
  * @method static string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
- * @method static mixed driver(string|null $driver = null)
+ * @method static mixed driver(?string $driver = null)
  * @method static \Illuminate\Session\SessionManager extend(string $driver, \Closure $callback)
  * @method static array getDrivers()
  * @method static \Illuminate\Contracts\Container\Container getContainer()
@@ -24,8 +24,8 @@
  * @method static bool has(string|array $key)
  * @method static mixed get(string $key, mixed $default = null)
  * @method static mixed pull(string $key, mixed $default = null)
- * @method static bool hasOldInput(string|null $key = null)
- * @method static mixed getOldInput(string|null $key = null, mixed $default = null)
+ * @method static bool hasOldInput(?string $key = null)
+ * @method static mixed getOldInput(?string $key = null, mixed $default = null)
  * @method static void replace(array $attributes)
  * @method static void put(string|array $key, mixed $value = null)
  * @method static mixed remember(string $key, \Closure $callback)
@@ -52,7 +52,7 @@
  * @method static void setExists(bool $value)
  * @method static string token()
  * @method static void regenerateToken()
- * @method static string|null previousUrl()
+ * @method static ?string previousUrl()
  * @method static void setPreviousUrl(string $url)
  * @method static void passwordConfirmed()
  * @method static \SessionHandlerInterface getHandler()
diff --git a/src/Illuminate/Support/Facades/Storage.php b/src/Illuminate/Support/Facades/Storage.php
index 0d13bb507df2..b55816400c6f 100644
--- a/src/Illuminate/Support/Facades/Storage.php
+++ b/src/Illuminate/Support/Facades/Storage.php
@@ -5,8 +5,8 @@
 use Illuminate\Filesystem\Filesystem;
 
 /**
- * @method static \Illuminate\Contracts\Filesystem\Filesystem drive(string|null $name = null)
- * @method static \Illuminate\Contracts\Filesystem\Filesystem disk(string|null $name = null)
+ * @method static \Illuminate\Contracts\Filesystem\Filesystem drive(?string $name = null)
+ * @method static \Illuminate\Contracts\Filesystem\Filesystem disk(?string $name = null)
  * @method static \Illuminate\Contracts\Filesystem\Filesystem cloud()
  * @method static \Illuminate\Contracts\Filesystem\Filesystem build(string|array $config)
  * @method static \Illuminate\Contracts\Filesystem\Filesystem createLocalDriver(array $config)
@@ -18,11 +18,11 @@
  * @method static string getDefaultDriver()
  * @method static string getDefaultCloudDriver()
  * @method static \Illuminate\Filesystem\FilesystemManager forgetDisk(array|string $disk)
- * @method static void purge(string|null $name = null)
+ * @method static void purge(?string $name = null)
  * @method static \Illuminate\Filesystem\FilesystemManager extend(string $driver, \Closure $callback)
  * @method static \Illuminate\Filesystem\FilesystemManager setApplication(\Illuminate\Contracts\Foundation\Application $app)
  * @method static bool exists(string $path)
- * @method static string|null get(string $path)
+ * @method static ?string get(string $path)
  * @method static resource|null readStream(string $path)
  * @method static bool put(string $path, string|resource $contents, mixed $options = [])
  * @method static bool writeStream(string $path, resource $resource, array $options = [])
@@ -35,13 +35,13 @@
  * @method static bool move(string $from, string $to)
  * @method static int size(string $path)
  * @method static int lastModified(string $path)
- * @method static array files(string|null $directory = null, bool $recursive = false)
- * @method static array allFiles(string|null $directory = null)
- * @method static array directories(string|null $directory = null, bool $recursive = false)
- * @method static array allDirectories(string|null $directory = null)
+ * @method static array files(?string $directory = null, bool $recursive = false)
+ * @method static array allFiles(?string $directory = null)
+ * @method static array directories(?string $directory = null, bool $recursive = false)
+ * @method static array allDirectories(?string $directory = null)
  * @method static bool makeDirectory(string $path)
  * @method static bool deleteDirectory(string $directory)
- * @method static \Illuminate\Filesystem\FilesystemAdapter assertExists(string|array $path, string|null $content = null)
+ * @method static \Illuminate\Filesystem\FilesystemAdapter assertExists(string|array $path, ?string $content = null)
  * @method static \Illuminate\Filesystem\FilesystemAdapter assertMissing(string|array $path)
  * @method static \Illuminate\Filesystem\FilesystemAdapter assertDirectoryEmpty(string $path)
  * @method static bool missing(string $path)
@@ -50,8 +50,8 @@
  * @method static bool directoryExists(string $path)
  * @method static bool directoryMissing(string $path)
  * @method static string path(string $path)
- * @method static \Symfony\Component\HttpFoundation\StreamedResponse response(string $path, string|null $name = null, array $headers = [], string|null $disposition = 'inline')
- * @method static \Symfony\Component\HttpFoundation\StreamedResponse download(string $path, string|null $name = null, array $headers = [])
+ * @method static \Symfony\Component\HttpFoundation\StreamedResponse response(string $path, ?string $name = null, array $headers = [], ?string $disposition = 'inline')
+ * @method static \Symfony\Component\HttpFoundation\StreamedResponse download(string $path, ?string $name = null, array $headers = [])
  * @method static string|false putFile(string $path, \Illuminate\Http\File|\Illuminate\Http\UploadedFile|string $file, mixed $options = [])
  * @method static string|false putFileAs(string $path, \Illuminate\Http\File|\Illuminate\Http\UploadedFile|string $file, string $name, mixed $options = [])
  * @method static string|false checksum(string $path, array $options = [])
@@ -85,7 +85,7 @@ class Storage extends Facade
     /**
      * Replace the given disk with a local testing disk.
      *
-     * @param  string|null  $disk
+     * @param  ?string  $disk
      * @param  array  $config
      * @return \Illuminate\Contracts\Filesystem\Filesystem
      */
@@ -113,7 +113,7 @@ public static function fake($disk = null, array $config = [])
     /**
      * Replace the given disk with a persistent local testing disk.
      *
-     * @param  string|null  $disk
+     * @param  ?string  $disk
      * @param  array  $config
      * @return \Illuminate\Contracts\Filesystem\Filesystem
      */
diff --git a/src/Illuminate/Support/Facades/URL.php b/src/Illuminate/Support/Facades/URL.php
index 8da96f482d99..0e94dde871ab 100755
--- a/src/Illuminate/Support/Facades/URL.php
+++ b/src/Illuminate/Support/Facades/URL.php
@@ -23,13 +23,13 @@
  * @method static string toRoute(\Illuminate\Routing\Route $route, mixed $parameters, bool $absolute)
  * @method static string action(string|array $action, mixed $parameters = [], bool $absolute = true)
  * @method static array formatParameters(mixed|array $parameters)
- * @method static string formatRoot(string $scheme, string|null $root = null)
+ * @method static string formatRoot(string $scheme, ?string $root = null)
  * @method static string format(string $root, string $path, \Illuminate\Routing\Route|null $route = null)
  * @method static bool isValidUrl(string $path)
  * @method static void defaults(array $defaults)
  * @method static array getDefaultParameters()
- * @method static void forceScheme(string|null $scheme)
- * @method static void forceRootUrl(string|null $root)
+ * @method static void forceScheme(?string $scheme)
+ * @method static void forceRootUrl(?string $root)
  * @method static \Illuminate\Routing\UrlGenerator formatHostUsing(\Closure $callback)
  * @method static \Illuminate\Routing\UrlGenerator formatPathUsing(\Closure $callback)
  * @method static \Closure pathFormatter()
diff --git a/src/Illuminate/Support/Facades/Validator.php b/src/Illuminate/Support/Facades/Validator.php
index 4d7002b391ae..479dabe4803d 100755
--- a/src/Illuminate/Support/Facades/Validator.php
+++ b/src/Illuminate/Support/Facades/Validator.php
@@ -5,9 +5,9 @@
 /**
  * @method static \Illuminate\Validation\Validator make(array $data, array $rules, array $messages = [], array $customAttributes = [])
  * @method static array validate(array $data, array $rules, array $messages = [], array $customAttributes = [])
- * @method static void extend(string $rule, \Closure|string $extension, string|null $message = null)
- * @method static void extendImplicit(string $rule, \Closure|string $extension, string|null $message = null)
- * @method static void extendDependent(string $rule, \Closure|string $extension, string|null $message = null)
+ * @method static void extend(string $rule, \Closure|string $extension, ?string $message = null)
+ * @method static void extendImplicit(string $rule, \Closure|string $extension, ?string $message = null)
+ * @method static void extendDependent(string $rule, \Closure|string $extension, ?string $message = null)
  * @method static void replacer(string $rule, \Closure|string $replacer)
  * @method static void includeUnvalidatedArrayKeys()
  * @method static void excludeUnvalidatedArrayKeys()
diff --git a/src/Illuminate/Support/Facades/View.php b/src/Illuminate/Support/Facades/View.php
index 10eaa645d548..c31dca43b596 100755
--- a/src/Illuminate/Support/Facades/View.php
+++ b/src/Illuminate/Support/Facades/View.php
@@ -43,7 +43,7 @@
  * @method static void startComponentFirst(array $names, array $data = [])
  * @method static string renderComponent()
  * @method static mixed|null getConsumableComponentData(string $key, mixed $default = null)
- * @method static void slot(string $name, string|null $content = null, array $attributes = [])
+ * @method static void slot(string $name, ?string $content = null, array $attributes = [])
  * @method static void endSlot()
  * @method static array creator(array|string $views, \Closure|string $callback)
  * @method static array composers(array $composers)
@@ -52,10 +52,10 @@
  * @method static void callCreator(\Illuminate\Contracts\View\View $view)
  * @method static void startFragment(string $fragment)
  * @method static string stopFragment()
- * @method static mixed getFragment(string $name, string|null $default = null)
+ * @method static mixed getFragment(string $name, ?string $default = null)
  * @method static array getFragments()
  * @method static void flushFragments()
- * @method static void startSection(string $section, string|null $content = null)
+ * @method static void startSection(string $section, ?string $content = null)
  * @method static void inject(string $section, string $content)
  * @method static string yieldSection()
  * @method static string stopSection(bool $overwrite = false)
@@ -64,7 +64,7 @@
  * @method static string parentPlaceholder(string $section = '')
  * @method static bool hasSection(string $name)
  * @method static bool sectionMissing(string $name)
- * @method static mixed getSection(string $name, string|null $default = null)
+ * @method static mixed getSection(string $name, ?string $default = null)
  * @method static array getSections()
  * @method static void flushSections()
  * @method static void addLoop(\Countable|array $data)
diff --git a/src/Illuminate/Support/Facades/Vite.php b/src/Illuminate/Support/Facades/Vite.php
index ef1e7f8ede3f..7eb7ec070797 100644
--- a/src/Illuminate/Support/Facades/Vite.php
+++ b/src/Illuminate/Support/Facades/Vite.php
@@ -4,7 +4,7 @@
 
 /**
  * @method static array preloadedAssets()
- * @method static string|null cspNonce()
+ * @method static ?string cspNonce()
  * @method static string useCspNonce(?string $nonce = null)
  * @method static \Illuminate\Foundation\Vite useIntegrityKey(string|false $key)
  * @method static \Illuminate\Foundation\Vite withEntryPoints(array $entryPoints)
@@ -16,8 +16,8 @@
  * @method static \Illuminate\Foundation\Vite useStyleTagAttributes(callable|array $attributes)
  * @method static \Illuminate\Foundation\Vite usePreloadTagAttributes(callable|array|false $attributes)
  * @method static \Illuminate\Support\HtmlString|void reactRefresh()
- * @method static string asset(string $asset, string|null $buildDirectory = null)
- * @method static string|null manifestHash(string|null $buildDirectory = null)
+ * @method static string asset(string $asset, ?string $buildDirectory = null)
+ * @method static ?string manifestHash(?string $buildDirectory = null)
  * @method static bool isRunningHot()
  * @method static string toHtml()
  * @method static void macro(string $name, object|callable $macro)
diff --git a/src/Illuminate/Support/Manager.php b/src/Illuminate/Support/Manager.php
index f8ae0729b16f..56ca8692fa51 100755
--- a/src/Illuminate/Support/Manager.php
+++ b/src/Illuminate/Support/Manager.php
@@ -58,7 +58,7 @@ abstract public function getDefaultDriver();
     /**
      * Get a driver instance.
      *
-     * @param  string|null  $driver
+     * @param  ?string  $driver
      * @return mixed
      *
      * @throws \InvalidArgumentException
diff --git a/src/Illuminate/Support/MessageBag.php b/src/Illuminate/Support/MessageBag.php
index 88ebfb08b71e..a88b0ee4d07e 100755
--- a/src/Illuminate/Support/MessageBag.php
+++ b/src/Illuminate/Support/MessageBag.php
@@ -162,8 +162,8 @@ public function hasAny($keys = [])
     /**
      * Get the first message from the message bag for a given key.
      *
-     * @param  string|null  $key
-     * @param  string|null  $format
+     * @param  ?string  $key
+     * @param  ?string  $format
      * @return string
      */
     public function first($key = null, $format = null)
@@ -179,7 +179,7 @@ public function first($key = null, $format = null)
      * Get all of the messages from the message bag for a given key.
      *
      * @param  string  $key
-     * @param  string|null  $format
+     * @param  ?string  $format
      * @return array
      */
     public function get($key, $format = null)
@@ -204,7 +204,7 @@ public function get($key, $format = null)
      * Get the messages for a wildcard key.
      *
      * @param  string  $key
-     * @param  string|null  $format
+     * @param  ?string  $format
      * @return array
      */
     protected function getMessagesForWildcardKey($key, $format)
@@ -223,7 +223,7 @@ protected function getMessagesForWildcardKey($key, $format)
     /**
      * Get all of the messages for every key in the message bag.
      *
-     * @param  string|null  $format
+     * @param  ?string  $format
      * @return array
      */
     public function all($format = null)
@@ -242,7 +242,7 @@ public function all($format = null)
     /**
      * Get all of the unique messages for every key in the message bag.
      *
-     * @param  string|null  $format
+     * @param  ?string  $format
      * @return array
      */
     public function unique($format = null)
diff --git a/src/Illuminate/Support/MultipleInstanceManager.php b/src/Illuminate/Support/MultipleInstanceManager.php
index 8544bdf71b34..138d7c7e5384 100644
--- a/src/Illuminate/Support/MultipleInstanceManager.php
+++ b/src/Illuminate/Support/MultipleInstanceManager.php
@@ -66,7 +66,7 @@ abstract public function getInstanceConfig($name);
     /**
      * Get an instance instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return mixed
      */
     public function instance($name = null)
@@ -153,7 +153,7 @@ public function forgetInstance($name = null)
     /**
      * Disconnect the given instance and remove from local cache.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return void
      */
     public function purge($name = null)
diff --git a/src/Illuminate/Support/Reflector.php b/src/Illuminate/Support/Reflector.php
index 1390c9dac965..5fdfd9c5e700 100644
--- a/src/Illuminate/Support/Reflector.php
+++ b/src/Illuminate/Support/Reflector.php
@@ -60,7 +60,7 @@ public static function isCallable($var, $syntaxOnly = false)
      * Get the class name of the given parameter's type, if possible.
      *
      * @param  \ReflectionParameter  $parameter
-     * @return string|null
+     * @return ?string
      */
     public static function getParameterClassName($parameter)
     {
diff --git a/src/Illuminate/Support/ServiceProvider.php b/src/Illuminate/Support/ServiceProvider.php
index 6c530c121d3c..f5a46090970b 100755
--- a/src/Illuminate/Support/ServiceProvider.php
+++ b/src/Illuminate/Support/ServiceProvider.php
@@ -319,8 +319,8 @@ protected function addPublishGroup($group, $paths)
     /**
      * Get the paths to publish.
      *
-     * @param  string|null  $provider
-     * @param  string|null  $group
+     * @param  ?string  $provider
+     * @param  ?string  $group
      * @return array
      */
     public static function pathsToPublish($provider = null, $group = null)
@@ -337,8 +337,8 @@ public static function pathsToPublish($provider = null, $group = null)
     /**
      * Get the paths for the provider or group (or both).
      *
-     * @param  string|null  $provider
-     * @param  string|null  $group
+     * @param  ?string  $provider
+     * @param  ?string  $group
      * @return array
      */
     protected static function pathsForProviderOrGroup($provider, $group)
diff --git a/src/Illuminate/Support/Str.php b/src/Illuminate/Support/Str.php
index 8b23bfad5edb..a09a9c69b8a3 100644
--- a/src/Illuminate/Support/Str.php
+++ b/src/Illuminate/Support/Str.php
@@ -118,7 +118,7 @@ public static function ascii($value, $language = 'en')
      * Transliterate a string to its closest ASCII representation.
      *
      * @param  string  $string
-     * @param  string|null  $unknown
+     * @param  ?string  $unknown
      * @param  bool|null  $strict
      * @return string
      */
@@ -294,7 +294,7 @@ public static function endsWith($haystack, $needles)
      * @param  string  $text
      * @param  string  $phrase
      * @param  array  $options
-     * @return string|null
+     * @return ?string
      */
     public static function excerpt($text, $phrase = '', $options = [])
     {
@@ -343,7 +343,7 @@ public static function finish($value, $cap)
      *
      * @param  string  $value
      * @param  string  $before
-     * @param  string|null  $after
+     * @param  ?string  $after
      * @return string
      */
     public static function wrap($value, $before, $after = null)
@@ -468,7 +468,7 @@ public static function kebab($value)
      * Return the length of the given string.
      *
      * @param  string  $value
-     * @param  string|null  $encoding
+     * @param  ?string  $encoding
      * @return int
      */
     public static function length($value, $encoding = null)
@@ -685,8 +685,8 @@ public static function padRight($value, $length, $pad = ' ')
      * Parse a Class[@]method style callback into class and method.
      *
      * @param  string  $callback
-     * @param  string|null  $default
-     * @return array<int, string|null>
+     * @param  ?string  $default
+     * @return array<int, ?string>
      */
     public static function parseCallback($callback, $default = null)
     {
@@ -1012,7 +1012,7 @@ public static function singular($value)
      *
      * @param  string  $title
      * @param  string  $separator
-     * @param  string|null  $language
+     * @param  ?string  $language
      * @param  array<string, string>  $dictionary
      * @return string
      */
@@ -1218,7 +1218,7 @@ public static function ucsplit($string)
      * Get the number of words a string contains.
      *
      * @param  string  $string
-     * @param  string|null  $characters
+     * @param  ?string  $characters
      * @return int
      */
     public static function wordCount($string, $characters = null)
diff --git a/src/Illuminate/Support/Stringable.php b/src/Illuminate/Support/Stringable.php
index 0fc5db25b717..7c2a2793891d 100644
--- a/src/Illuminate/Support/Stringable.php
+++ b/src/Illuminate/Support/Stringable.php
@@ -230,7 +230,7 @@ public function exactly($value)
      *
      * @param  string  $phrase
      * @param  array  $options
-     * @return string|null
+     * @return ?string
      */
     public function excerpt($phrase = '', $options = [])
     {
@@ -363,7 +363,7 @@ public function kebab()
     /**
      * Return the length of the given string.
      *
-     * @param  string|null  $encoding
+     * @param  ?string  $encoding
      * @return int
      */
     public function length($encoding = null)
@@ -501,8 +501,8 @@ public function padRight($length, $pad = ' ')
     /**
      * Parse a Class@method style callback into class and method.
      *
-     * @param  string|null  $default
-     * @return array<int, string|null>
+     * @param  ?string  $default
+     * @return array<int, ?string>
      */
     public function parseCallback($default = null)
     {
@@ -738,7 +738,7 @@ public function singular()
      * Generate a URL friendly "slug" from a given string.
      *
      * @param  string  $separator
-     * @param  string|null  $language
+     * @param  ?string  $language
      * @param  array<string, string>  $dictionary
      * @return static
      */
@@ -1071,7 +1071,7 @@ public function words($words = 100, $end = '...')
     /**
      * Get the number of words a string contains.
      *
-     * @param  string|null  $characters
+     * @param  ?string  $characters
      * @return int
      */
     public function wordCount($characters = null)
@@ -1083,7 +1083,7 @@ public function wordCount($characters = null)
      * Wrap the string with the given strings.
      *
      * @param  string  $before
-     * @param  string|null  $after
+     * @param  ?string  $after
      * @return static
      */
     public function wrap($before, $after = null)
@@ -1180,8 +1180,8 @@ public function toBoolean()
     /**
      * Get the underlying string value as a Carbon instance.
      *
-     * @param  string|null  $format
-     * @param  string|null  $tz
+     * @param  ?string  $format
+     * @param  ?string  $tz
      * @return \Illuminate\Support\Carbon
      *
      * @throws \Carbon\Exceptions\InvalidFormatException
diff --git a/src/Illuminate/Support/Testing/Fakes/MailFake.php b/src/Illuminate/Support/Testing/Fakes/MailFake.php
index c95c15a55b5c..5b546559edbd 100644
--- a/src/Illuminate/Support/Testing/Fakes/MailFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/MailFake.php
@@ -291,7 +291,7 @@ protected function queuedMailablesOf($type)
     /**
      * Get a mailer instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return \Illuminate\Contracts\Mail\Mailer
      */
     public function mailer($name = null)
@@ -375,7 +375,7 @@ public function send($view, array $data = [], $callback = null)
      * Queue a new e-mail message for sending.
      *
      * @param  \Illuminate\Contracts\Mail\Mailable|string|array  $view
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function queue($view, $queue = null)
@@ -396,7 +396,7 @@ public function queue($view, $queue = null)
      *
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  \Illuminate\Contracts\Mail\Mailable|string|array  $view
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $view, $queue = null)
diff --git a/src/Illuminate/Support/Testing/Fakes/NotificationFake.php b/src/Illuminate/Support/Testing/Fakes/NotificationFake.php
index 5991420d3342..57722a054eec 100644
--- a/src/Illuminate/Support/Testing/Fakes/NotificationFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/NotificationFake.php
@@ -28,7 +28,7 @@ class NotificationFake implements NotificationDispatcher, NotificationFactory
     /**
      * Locale used when sending notifications.
      *
-     * @var string|null
+     * @var ?string
      */
     public $locale;
 
@@ -342,7 +342,7 @@ public function sendNow($notifiables, $notification, array $channels = null)
     /**
      * Get a channel instance by name.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @return mixed
      */
     public function channel($name = null)
diff --git a/src/Illuminate/Support/Testing/Fakes/QueueFake.php b/src/Illuminate/Support/Testing/Fakes/QueueFake.php
index f2caa768daf7..0cf039f41ac9 100644
--- a/src/Illuminate/Support/Testing/Fakes/QueueFake.php
+++ b/src/Illuminate/Support/Testing/Fakes/QueueFake.php
@@ -303,7 +303,7 @@ public function connection($value = null)
     /**
      * Get the size of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return int
      */
     public function size($queue = null)
@@ -318,7 +318,7 @@ public function size($queue = null)
      *
      * @param  string|object  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function push($job, $data = '', $queue = null)
@@ -378,7 +378,7 @@ protected function shouldDispatchJob($job)
      * Push a raw payload onto the queue.
      *
      * @param  string  $payload
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @param  array  $options
      * @return mixed
      */
@@ -393,7 +393,7 @@ public function pushRaw($payload, $queue = null, array $options = [])
      * @param  \DateTimeInterface|\DateInterval|int  $delay
      * @param  string|object  $job
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function later($delay, $job, $data = '', $queue = null)
@@ -431,7 +431,7 @@ public function laterOn($queue, $delay, $job, $data = '')
     /**
      * Pop the next job off of the queue.
      *
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return \Illuminate\Contracts\Queue\Job|null
      */
     public function pop($queue = null)
@@ -444,7 +444,7 @@ public function pop($queue = null)
      *
      * @param  array  $jobs
      * @param  mixed  $data
-     * @param  string|null  $queue
+     * @param  ?string  $queue
      * @return mixed
      */
     public function bulk($jobs, $data = '', $queue = null)
diff --git a/src/Illuminate/Support/helpers.php b/src/Illuminate/Support/helpers.php
index bb8d178f4889..2dc5ca2f42c2 100755
--- a/src/Illuminate/Support/helpers.php
+++ b/src/Illuminate/Support/helpers.php
@@ -156,7 +156,7 @@ function filled($value)
      * Get an item from an object using "dot" notation.
      *
      * @param  object  $object
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @param  mixed  $default
      * @return mixed
      */
@@ -265,7 +265,7 @@ function retry($times, callable $callback, $sleepMilliseconds = 0, $when = null)
     /**
      * Get a new stringable object from the given string.
      *
-     * @param  string|null  $string
+     * @param  ?string  $string
      * @return \Illuminate\Support\Stringable|mixed
      */
     function str($string = null)
diff --git a/src/Illuminate/Testing/AssertableJsonString.php b/src/Illuminate/Testing/AssertableJsonString.php
index 6d40d50b17bb..f85c6980828a 100644
--- a/src/Illuminate/Testing/AssertableJsonString.php
+++ b/src/Illuminate/Testing/AssertableJsonString.php
@@ -51,7 +51,7 @@ public function __construct($jsonable)
     /**
      * Validate and return the decoded response JSON.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     public function json($key = null)
@@ -63,7 +63,7 @@ public function json($key = null)
      * Assert that the response JSON has the expected count of items at the given key.
      *
      * @param  int  $count
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return $this
      */
     public function assertCount(int $count, $key = null)
diff --git a/src/Illuminate/Testing/Fluent/AssertableJson.php b/src/Illuminate/Testing/Fluent/AssertableJson.php
index fde468e33a87..00a0ca642b7c 100644
--- a/src/Illuminate/Testing/Fluent/AssertableJson.php
+++ b/src/Illuminate/Testing/Fluent/AssertableJson.php
@@ -29,7 +29,7 @@ class AssertableJson implements Arrayable
     /**
      * The "dot" path to the current scope.
      *
-     * @var string|null
+     * @var ?string
      */
     private $path;
 
@@ -37,7 +37,7 @@ class AssertableJson implements Arrayable
      * Create a new fluent, assertable JSON data instance.
      *
      * @param  array  $props
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @return void
      */
     protected function __construct(array $props, string $path = null)
@@ -64,7 +64,7 @@ protected function dotPath(string $key = ''): string
     /**
      * Retrieve a prop within the current scope using "dot" notation.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     protected function prop(string $key = null)
diff --git a/src/Illuminate/Testing/Fluent/Concerns/Debugging.php b/src/Illuminate/Testing/Fluent/Concerns/Debugging.php
index e655556cf939..9e0dc121f136 100644
--- a/src/Illuminate/Testing/Fluent/Concerns/Debugging.php
+++ b/src/Illuminate/Testing/Fluent/Concerns/Debugging.php
@@ -7,7 +7,7 @@ trait Debugging
     /**
      * Dumps the given props.
      *
-     * @param  string|null  $prop
+     * @param  ?string  $prop
      * @return $this
      */
     public function dump(string $prop = null): self
@@ -20,7 +20,7 @@ public function dump(string $prop = null): self
     /**
      * Dumps the given props and exits.
      *
-     * @param  string|null  $prop
+     * @param  ?string  $prop
      * @return never
      */
     public function dd(string $prop = null): void
@@ -31,7 +31,7 @@ public function dd(string $prop = null): void
     /**
      * Retrieve a prop within the current scope using "dot" notation.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     abstract protected function prop(string $key = null);
diff --git a/src/Illuminate/Testing/Fluent/Concerns/Has.php b/src/Illuminate/Testing/Fluent/Concerns/Has.php
index 7765f4a061a5..389229612d2d 100644
--- a/src/Illuminate/Testing/Fluent/Concerns/Has.php
+++ b/src/Illuminate/Testing/Fluent/Concerns/Has.php
@@ -182,7 +182,7 @@ abstract protected function interactsWith(string $key): void;
     /**
      * Retrieve a prop within the current scope using "dot" notation.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     abstract protected function prop(string $key = null);
diff --git a/src/Illuminate/Testing/Fluent/Concerns/Interaction.php b/src/Illuminate/Testing/Fluent/Concerns/Interaction.php
index 15e7e9508f55..8794fa7cbd3b 100644
--- a/src/Illuminate/Testing/Fluent/Concerns/Interaction.php
+++ b/src/Illuminate/Testing/Fluent/Concerns/Interaction.php
@@ -60,7 +60,7 @@ public function etc(): self
     /**
      * Retrieve a prop within the current scope using "dot" notation.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     abstract protected function prop(string $key = null);
diff --git a/src/Illuminate/Testing/Fluent/Concerns/Matching.php b/src/Illuminate/Testing/Fluent/Concerns/Matching.php
index 9ff7a31823ea..a8534f2cbbe8 100644
--- a/src/Illuminate/Testing/Fluent/Concerns/Matching.php
+++ b/src/Illuminate/Testing/Fluent/Concerns/Matching.php
@@ -229,7 +229,7 @@ abstract public function has(string $key, $value = null, Closure $scope = null);
     /**
      * Retrieve a prop within the current scope using "dot" notation.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     abstract protected function prop(string $key = null);
diff --git a/src/Illuminate/Testing/TestResponse.php b/src/Illuminate/Testing/TestResponse.php
index 583318f2c43e..cbb38eedea2f 100644
--- a/src/Illuminate/Testing/TestResponse.php
+++ b/src/Illuminate/Testing/TestResponse.php
@@ -215,7 +215,7 @@ protected function statusMessageWithDetails($expected, $actual)
     /**
      * Assert whether the response is redirecting to a given URI.
      *
-     * @param  string|null  $uri
+     * @param  ?string  $uri
      * @return $this
      */
     public function assertRedirect($uri = null)
@@ -280,7 +280,7 @@ public function assertRedirectToRoute($name, $parameters = [])
     /**
      * Assert whether the response is redirecting to a given signed route.
      *
-     * @param  string|null  $name
+     * @param  ?string  $name
      * @param  mixed  $parameters
      * @return $this
      */
@@ -373,7 +373,7 @@ public function assertLocation($uri)
     /**
      * Assert that the response offers a file download.
      *
-     * @param  string|null  $filename
+     * @param  ?string  $filename
      * @return $this
      */
     public function assertDownload($filename = null)
@@ -838,7 +838,7 @@ public function assertJsonStructure(array $structure = null, $responseData = nul
      * Assert that the response JSON has the expected count of items at the given key.
      *
      * @param  int  $count
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return $this
      */
     public function assertJsonCount(int $count, $key = null)
@@ -993,7 +993,7 @@ public function decodeResponseJson()
     /**
      * Validate and return the decoded response JSON.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return mixed
      */
     public function json($key = null)
@@ -1004,7 +1004,7 @@ public function json($key = null)
     /**
      * Get the JSON decoded body of the response as a collection.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return \Illuminate\Support\Collection
      */
     public function collect($key = null)
@@ -1342,7 +1342,7 @@ public function assertSessionHasErrors($keys = [], $format = null, $errorBag = '
      * Assert that the session is missing the given errors.
      *
      * @param  string|array  $keys
-     * @param  string|null  $format
+     * @param  ?string  $format
      * @param  string  $errorBag
      * @return $this
      */
@@ -1496,7 +1496,7 @@ public function ddSession($keys = [])
     /**
      * Dump the content from the response.
      *
-     * @param  string|null  $key
+     * @param  ?string  $key
      * @return $this
      */
     public function dump($key = null)
diff --git a/src/Illuminate/Translation/ArrayLoader.php b/src/Illuminate/Translation/ArrayLoader.php
index 117e0440ee31..db6f40e5a61d 100644
--- a/src/Illuminate/Translation/ArrayLoader.php
+++ b/src/Illuminate/Translation/ArrayLoader.php
@@ -18,7 +18,7 @@ class ArrayLoader implements Loader
      *
      * @param  string  $locale
      * @param  string  $group
-     * @param  string|null  $namespace
+     * @param  ?string  $namespace
      * @return array
      */
     public function load($locale, $group, $namespace = null)
@@ -57,7 +57,7 @@ public function addJsonPath($path)
      * @param  string  $locale
      * @param  string  $group
      * @param  array  $messages
-     * @param  string|null  $namespace
+     * @param  ?string  $namespace
      * @return $this
      */
     public function addMessages($locale, $group, array $messages, $namespace = null)
diff --git a/src/Illuminate/Translation/FileLoader.php b/src/Illuminate/Translation/FileLoader.php
index f359a8e5584d..e78aa7bfc62c 100755
--- a/src/Illuminate/Translation/FileLoader.php
+++ b/src/Illuminate/Translation/FileLoader.php
@@ -54,7 +54,7 @@ public function __construct(Filesystem $files, $path)
      *
      * @param  string  $locale
      * @param  string  $group
-     * @param  string|null  $namespace
+     * @param  ?string  $namespace
      * @return array
      */
     public function load($locale, $group, $namespace = null)
diff --git a/src/Illuminate/Translation/PotentiallyTranslatedString.php b/src/Illuminate/Translation/PotentiallyTranslatedString.php
index f46db3522429..791b426fe3ed 100644
--- a/src/Illuminate/Translation/PotentiallyTranslatedString.php
+++ b/src/Illuminate/Translation/PotentiallyTranslatedString.php
@@ -16,7 +16,7 @@ class PotentiallyTranslatedString implements Stringable
     /**
      * The translated string.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $translation;
 
@@ -44,7 +44,7 @@ public function __construct($string, $translator)
      * Translate the string.
      *
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return $this
      */
     public function translate($replace = [], $locale = null)
@@ -59,7 +59,7 @@ public function translate($replace = [], $locale = null)
      *
      * @param  \Countable|int|array  $number
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return $this
      */
     public function translateChoice($number, array $replace = [], $locale = null)
diff --git a/src/Illuminate/Translation/Translator.php b/src/Illuminate/Translation/Translator.php
index 048423f7aed6..a873b2859354 100755
--- a/src/Illuminate/Translation/Translator.php
+++ b/src/Illuminate/Translation/Translator.php
@@ -74,7 +74,7 @@ public function __construct(Loader $loader, $locale)
      * Determine if a translation exists for a given locale.
      *
      * @param  string  $key
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return bool
      */
     public function hasForLocale($key, $locale = null)
@@ -86,7 +86,7 @@ public function hasForLocale($key, $locale = null)
      * Determine if a translation exists.
      *
      * @param  string  $key
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @param  bool  $fallback
      * @return bool
      */
@@ -100,7 +100,7 @@ public function has($key, $locale = null, $fallback = true)
      *
      * @param  string  $key
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @param  bool  $fallback
      * @return string|array
      */
@@ -147,7 +147,7 @@ public function get($key, array $replace = [], $locale = null, $fallback = true)
      * @param  string  $key
      * @param  \Countable|int|array  $number
      * @param  array  $replace
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return string
      */
     public function choice($key, $number, array $replace = [], $locale = null)
@@ -173,7 +173,7 @@ public function choice($key, $number, array $replace = [], $locale = null)
     /**
      * Get the proper locale for a choice operation.
      *
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return string
      */
     protected function localeForChoice($locale)
@@ -327,7 +327,7 @@ public function parseKey($key)
     /**
      * Get the array of locales to be checked.
      *
-     * @param  string|null  $locale
+     * @param  ?string  $locale
      * @return array
      */
     protected function localeArray($locale)
diff --git a/src/Illuminate/Validation/ClosureValidationRule.php b/src/Illuminate/Validation/ClosureValidationRule.php
index 8f247fc37bbf..2222afbf51d5 100644
--- a/src/Illuminate/Validation/ClosureValidationRule.php
+++ b/src/Illuminate/Validation/ClosureValidationRule.php
@@ -23,7 +23,7 @@ class ClosureValidationRule implements RuleContract
     /**
      * The validation error message.
      *
-     * @var string|null
+     * @var ?string
      */
     public $message;
 
diff --git a/src/Illuminate/Validation/Concerns/FormatsMessages.php b/src/Illuminate/Validation/Concerns/FormatsMessages.php
index 17d0a4649c1e..3594492c703f 100644
--- a/src/Illuminate/Validation/Concerns/FormatsMessages.php
+++ b/src/Illuminate/Validation/Concerns/FormatsMessages.php
@@ -76,7 +76,7 @@ protected function getMessage($attribute, $rule)
      *
      * @param  string  $attribute
      * @param  string  $rule
-     * @return string|null
+     * @return ?string
      */
     protected function getInlineMessage($attribute, $rule)
     {
@@ -93,7 +93,7 @@ protected function getInlineMessage($attribute, $rule)
      * @param  string  $attribute
      * @param  string  $lowerRule
      * @param  array|null  $source
-     * @return string|null
+     * @return ?string
      */
     protected function getFromLocalArray($attribute, $lowerRule, $source = null)
     {
@@ -487,7 +487,7 @@ protected function getAttributeList(array $values)
      * @param  string  $rule
      * @param  array  $parameters
      * @param  \Illuminate\Validation\Validator  $validator
-     * @return string|null
+     * @return ?string
      */
     protected function callReplacer($message, $attribute, $rule, $parameters, $validator)
     {
diff --git a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
index b6c6e0a3956c..b294312dda09 100644
--- a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
+++ b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
@@ -256,7 +256,7 @@ protected function compareDates($attribute, $value, $parameters, $operator)
      * Get the date format for an attribute if it has one.
      *
      * @param  string  $attribute
-     * @return string|null
+     * @return ?string
      */
     protected function getDateFormat($attribute)
     {
@@ -909,7 +909,7 @@ public function validateUnique($attribute, $value, $parameters)
     /**
      * Get the excluded ID column and value for the unique rule.
      *
-     * @param  string|null  $idColumn
+     * @param  ?string  $idColumn
      * @param  array<int, int|string>  $parameters
      * @return array
      */
diff --git a/src/Illuminate/Validation/DatabasePresenceVerifier.php b/src/Illuminate/Validation/DatabasePresenceVerifier.php
index 9229f06b708a..a784caeff305 100755
--- a/src/Illuminate/Validation/DatabasePresenceVerifier.php
+++ b/src/Illuminate/Validation/DatabasePresenceVerifier.php
@@ -39,7 +39,7 @@ public function __construct(ConnectionResolverInterface $db)
      * @param  string  $column
      * @param  string  $value
      * @param  int|null  $excludeId
-     * @param  string|null  $idColumn
+     * @param  ?string  $idColumn
      * @param  array  $extra
      * @return int
      */
diff --git a/src/Illuminate/Validation/Factory.php b/src/Illuminate/Validation/Factory.php
index 88879f4049a9..a1c6504ebc25 100755
--- a/src/Illuminate/Validation/Factory.php
+++ b/src/Illuminate/Validation/Factory.php
@@ -190,7 +190,7 @@ protected function addExtensions(Validator $validator)
      *
      * @param  string  $rule
      * @param  \Closure|string  $extension
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @return void
      */
     public function extend($rule, $extension, $message = null)
@@ -207,7 +207,7 @@ public function extend($rule, $extension, $message = null)
      *
      * @param  string  $rule
      * @param  \Closure|string  $extension
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @return void
      */
     public function extendImplicit($rule, $extension, $message = null)
@@ -224,7 +224,7 @@ public function extendImplicit($rule, $extension, $message = null)
      *
      * @param  string  $rule
      * @param  \Closure|string  $extension
-     * @param  string|null  $message
+     * @param  ?string  $message
      * @return void
      */
     public function extendDependent($rule, $extension, $message = null)
diff --git a/src/Illuminate/Validation/PresenceVerifierInterface.php b/src/Illuminate/Validation/PresenceVerifierInterface.php
index da58a1210a8a..819d1416f4a5 100755
--- a/src/Illuminate/Validation/PresenceVerifierInterface.php
+++ b/src/Illuminate/Validation/PresenceVerifierInterface.php
@@ -11,7 +11,7 @@ interface PresenceVerifierInterface
      * @param  string  $column
      * @param  string  $value
      * @param  int|null  $excludeId
-     * @param  string|null  $idColumn
+     * @param  ?string  $idColumn
      * @param  array  $extra
      * @return int
      */
diff --git a/src/Illuminate/Validation/Rules/Unique.php b/src/Illuminate/Validation/Rules/Unique.php
index 1f4e86787050..8440886fdcd5 100644
--- a/src/Illuminate/Validation/Rules/Unique.php
+++ b/src/Illuminate/Validation/Rules/Unique.php
@@ -27,7 +27,7 @@ class Unique
      * Ignore the given ID during the unique check.
      *
      * @param  mixed  $id
-     * @param  string|null  $idColumn
+     * @param  ?string  $idColumn
      * @return $this
      */
     public function ignore($id, $idColumn = null)
@@ -46,7 +46,7 @@ public function ignore($id, $idColumn = null)
      * Ignore the given model during the unique check.
      *
      * @param  \Illuminate\Database\Eloquent\Model  $model
-     * @param  string|null  $idColumn
+     * @param  ?string  $idColumn
      * @return $this
      */
     public function ignoreModel($model, $idColumn = null)
diff --git a/src/Illuminate/Validation/Validator.php b/src/Illuminate/Validation/Validator.php
index 8a552fae6246..623251d7d668 100755
--- a/src/Illuminate/Validation/Validator.php
+++ b/src/Illuminate/Validation/Validator.php
@@ -1416,7 +1416,7 @@ public function setFallbackMessages(array $messages)
     /**
      * Get the Presence Verifier implementation.
      *
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @return \Illuminate\Validation\PresenceVerifierInterface
      *
      * @throws \RuntimeException
diff --git a/src/Illuminate/View/Compilers/BladeCompiler.php b/src/Illuminate/View/Compilers/BladeCompiler.php
index 1435b3567ab5..853b8a908ccf 100644
--- a/src/Illuminate/View/Compilers/BladeCompiler.php
+++ b/src/Illuminate/View/Compilers/BladeCompiler.php
@@ -161,7 +161,7 @@ class BladeCompiler extends Compiler implements CompilerInterface
     /**
      * Compile the view at the given path.
      *
-     * @param  string|null  $path
+     * @param  ?string  $path
      * @return void
      */
     public function compile($path = null)
@@ -587,7 +587,7 @@ protected function compileStatement($match)
      * Call the given directive with the given value.
      *
      * @param  string  $name
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @return string
      */
     protected function callCustomDirective($name, $value)
@@ -687,7 +687,7 @@ public function check($name, ...$parameters)
      * Register a class-based component alias directive.
      *
      * @param  string  $class
-     * @param  string|null  $alias
+     * @param  ?string  $alias
      * @param  string  $prefix
      * @return void
      */
@@ -744,7 +744,7 @@ public function getClassComponentAliases()
      * Register a new anonymous component path.
      *
      * @param  string  $path
-     * @param  string|null  $prefix
+     * @param  ?string  $prefix
      * @return void
      */
     public function anonymousComponentPath(string $path, string $prefix = null)
@@ -766,7 +766,7 @@ public function anonymousComponentPath(string $path, string $prefix = null)
      * Register an anonymous component namespace.
      *
      * @param  string  $directory
-     * @param  string|null  $prefix
+     * @param  ?string  $prefix
      * @return void
      */
     public function anonymousComponentNamespace(string $directory, string $prefix = null)
@@ -825,7 +825,7 @@ public function getClassComponentNamespaces()
      * Register a component alias directive.
      *
      * @param  string  $path
-     * @param  string|null  $alias
+     * @param  ?string  $alias
      * @return void
      */
     public function aliasComponent($path, $alias = null)
@@ -847,7 +847,7 @@ public function aliasComponent($path, $alias = null)
      * Register an include alias directive.
      *
      * @param  string  $path
-     * @param  string|null  $alias
+     * @param  ?string  $alias
      * @return void
      */
     public function include($path, $alias = null)
@@ -859,7 +859,7 @@ public function include($path, $alias = null)
      * Register an include alias directive.
      *
      * @param  string  $path
-     * @param  string|null  $alias
+     * @param  ?string  $alias
      * @return void
      */
     public function aliasInclude($path, $alias = null)
diff --git a/src/Illuminate/View/Compilers/ComponentTagCompiler.php b/src/Illuminate/View/Compilers/ComponentTagCompiler.php
index 8fee31dd29a4..27f884222404 100644
--- a/src/Illuminate/View/Compilers/ComponentTagCompiler.php
+++ b/src/Illuminate/View/Compilers/ComponentTagCompiler.php
@@ -310,7 +310,7 @@ public function componentClass(string $component)
      *
      * @param  \Illuminate\Contracts\View\Factory  $viewFactory
      * @param  string  $component
-     * @return string|null
+     * @return ?string
      */
     protected function guessAnonymousComponentUsingPaths(Factory $viewFactory, string $component)
     {
@@ -345,7 +345,7 @@ protected function guessAnonymousComponentUsingPaths(Factory $viewFactory, strin
      *
      * @param  \Illuminate\Contracts\View\Factory  $viewFactory
      * @param  string  $component
-     * @return string|null
+     * @return ?string
      */
     protected function guessAnonymousComponentUsingNamespaces(Factory $viewFactory, string $component)
     {
@@ -375,7 +375,7 @@ protected function guessAnonymousComponentUsingNamespaces(Factory $viewFactory,
      * Find the class for the given component using the registered namespaces.
      *
      * @param  string  $component
-     * @return string|null
+     * @return ?string
      */
     public function findClassByComponent(string $component)
     {
diff --git a/src/Illuminate/View/Compilers/Concerns/CompilesConditionals.php b/src/Illuminate/View/Compilers/Concerns/CompilesConditionals.php
index 2b1c0e8e41d4..b2644bb47ea4 100644
--- a/src/Illuminate/View/Compilers/Concerns/CompilesConditionals.php
+++ b/src/Illuminate/View/Compilers/Concerns/CompilesConditionals.php
@@ -16,7 +16,7 @@ trait CompilesConditionals
     /**
      * Compile the if-auth statements into valid PHP.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return string
      */
     protected function compileAuth($guard = null)
@@ -29,7 +29,7 @@ protected function compileAuth($guard = null)
     /**
      * Compile the else-auth statements into valid PHP.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return string
      */
     protected function compileElseAuth($guard = null)
@@ -93,7 +93,7 @@ protected function compileEndProduction()
     /**
      * Compile the if-guest statements into valid PHP.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return string
      */
     protected function compileGuest($guard = null)
@@ -106,7 +106,7 @@ protected function compileGuest($guard = null)
     /**
      * Compile the else-guest statements into valid PHP.
      *
-     * @param  string|null  $guard
+     * @param  ?string  $guard
      * @return string
      */
     protected function compileElseGuest($guard = null)
@@ -285,7 +285,7 @@ protected function compileEndSwitch()
     /**
      * Compile a once block into valid PHP.
      *
-     * @param  string|null  $id
+     * @param  ?string  $id
      * @return string
      */
     protected function compileOnce($id = null)
diff --git a/src/Illuminate/View/Compilers/Concerns/CompilesTranslations.php b/src/Illuminate/View/Compilers/Concerns/CompilesTranslations.php
index 7cbafdb93dd8..62f790ea51e8 100644
--- a/src/Illuminate/View/Compilers/Concerns/CompilesTranslations.php
+++ b/src/Illuminate/View/Compilers/Concerns/CompilesTranslations.php
@@ -7,7 +7,7 @@ trait CompilesTranslations
     /**
      * Compile the lang statements into valid PHP.
      *
-     * @param  string|null  $expression
+     * @param  ?string  $expression
      * @return string
      */
     protected function compileLang($expression)
diff --git a/src/Illuminate/View/Component.php b/src/Illuminate/View/Component.php
index 949803056425..ae3400a2967b 100644
--- a/src/Illuminate/View/Component.php
+++ b/src/Illuminate/View/Component.php
@@ -384,7 +384,7 @@ public function shouldRender()
     /**
      * Get the evaluated view contents for the given view.
      *
-     * @param  string|null  $view
+     * @param  ?string  $view
      * @param  \Illuminate\Contracts\Support\Arrayable|array  $data
      * @param  array  $mergeData
      * @return \Illuminate\Contracts\View\View
diff --git a/src/Illuminate/View/Concerns/ManagesComponents.php b/src/Illuminate/View/Concerns/ManagesComponents.php
index f24908f1e936..8d7e69f9ad63 100644
--- a/src/Illuminate/View/Concerns/ManagesComponents.php
+++ b/src/Illuminate/View/Concerns/ManagesComponents.php
@@ -163,7 +163,7 @@ public function getConsumableComponentData($key, $default = null)
      * Start the slot rendering process.
      *
      * @param  string  $name
-     * @param  string|null  $content
+     * @param  ?string  $content
      * @param  array  $attributes
      * @return void
      */
diff --git a/src/Illuminate/View/Concerns/ManagesFragments.php b/src/Illuminate/View/Concerns/ManagesFragments.php
index 7273da64a5f2..b151c7bee6e7 100644
--- a/src/Illuminate/View/Concerns/ManagesFragments.php
+++ b/src/Illuminate/View/Concerns/ManagesFragments.php
@@ -57,7 +57,7 @@ public function stopFragment()
      * Get the contents of a fragment.
      *
      * @param  string  $name
-     * @param  string|null  $default
+     * @param  ?string  $default
      * @return mixed
      */
     public function getFragment($name, $default = null)
diff --git a/src/Illuminate/View/Concerns/ManagesLayouts.php b/src/Illuminate/View/Concerns/ManagesLayouts.php
index f04512658761..4168dafeb9d0 100644
--- a/src/Illuminate/View/Concerns/ManagesLayouts.php
+++ b/src/Illuminate/View/Concerns/ManagesLayouts.php
@@ -40,7 +40,7 @@ trait ManagesLayouts
      * Start injecting content into a section.
      *
      * @param  string  $section
-     * @param  string|null  $content
+     * @param  ?string  $content
      * @return void
      */
     public function startSection($section, $content = null)
@@ -224,7 +224,7 @@ public function sectionMissing($name)
      * Get the contents of a section.
      *
      * @param  string  $name
-     * @param  string|null  $default
+     * @param  ?string  $default
      * @return mixed
      */
     public function getSection($name, $default = null)
diff --git a/src/Illuminate/View/Factory.php b/src/Illuminate/View/Factory.php
index 315edc120dd0..d76cd19b8d3a 100755
--- a/src/Illuminate/View/Factory.php
+++ b/src/Illuminate/View/Factory.php
@@ -314,7 +314,7 @@ public function getEngineFromPath($path)
      * Get the extension used by the view file.
      *
      * @param  string  $path
-     * @return string|null
+     * @return ?string
      */
     protected function getExtension($path)
     {
diff --git a/tests/Database/DatabaseConnectionTest.php b/tests/Database/DatabaseConnectionTest.php
index cfc027e85fcd..8c4366e161a6 100755
--- a/tests/Database/DatabaseConnectionTest.php
+++ b/tests/Database/DatabaseConnectionTest.php
@@ -497,8 +497,8 @@ class DatabaseConnectionTestMockPDOException extends PDOException
      * Overrides Exception::__construct, which casts $code to integer, so that we can create
      * an exception with a string $code consistent with the real PDOException behavior.
      *
-     * @param  string|null  $message
-     * @param  string|null  $code
+     * @param  ?string  $message
+     * @param  ?string  $code
      * @return void
      */
     public function __construct($message = null, $code = null)
diff --git a/tests/Integration/Console/CommandSchedulingTest.php b/tests/Integration/Console/CommandSchedulingTest.php
index 8e078f0b531b..e335135a04d4 100644
--- a/tests/Integration/Console/CommandSchedulingTest.php
+++ b/tests/Integration/Console/CommandSchedulingTest.php
@@ -27,7 +27,7 @@ class CommandSchedulingTest extends TestCase
     /**
      * Just in case Testbench starts to ship an `artisan` script, we'll check and save a backup.
      *
-     * @var string|null
+     * @var ?string
      */
     protected $originalArtisan;
 
diff --git a/tests/Integration/Database/EloquentModelCustomCastingTest.php b/tests/Integration/Database/EloquentModelCustomCastingTest.php
index 47ce39932720..296524cbcd39 100644
--- a/tests/Integration/Database/EloquentModelCustomCastingTest.php
+++ b/tests/Integration/Database/EloquentModelCustomCastingTest.php
@@ -258,7 +258,7 @@ class GMPCast implements CastsAttributes, SerializesCastableAttributes
      * @param  string  $key
      * @param  string  $value
      * @param  array  $attributes
-     * @return string|null
+     * @return ?string
      */
     public function get($model, $key, $value, $attributes)
     {
@@ -270,7 +270,7 @@ public function get($model, $key, $value, $attributes)
      *
      * @param  \Illuminate\Database\Eloquent\Model  $model
      * @param  string  $key
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @param  array  $attributes
      * @return string
      */
@@ -303,7 +303,7 @@ class NonNullableString implements CastsAttributes
      * @param  string  $key
      * @param  string  $value
      * @param  array  $attributes
-     * @return string|null
+     * @return ?string
      */
     public function get($model, $key, $value, $attributes)
     {
@@ -315,7 +315,7 @@ public function get($model, $key, $value, $attributes)
      *
      * @param  \Illuminate\Database\Eloquent\Model  $model
      * @param  string  $key
-     * @param  string|null  $value
+     * @param  ?string  $value
      * @param  array  $attributes
      * @return string
      */
diff --git a/tests/Queue/RedisQueueIntegrationTest.php b/tests/Queue/RedisQueueIntegrationTest.php
index ae54171c80c3..99d5c871f68f 100644
--- a/tests/Queue/RedisQueueIntegrationTest.php
+++ b/tests/Queue/RedisQueueIntegrationTest.php
@@ -517,7 +517,7 @@ public function testBulkJobQueuedEvent($driver)
     /**
      * @param  string  $driver
      * @param  string  $default
-     * @param  string|null  $connection
+     * @param  ?string  $connection
      * @param  int  $retryAfter
      * @param  int|null  $blockFor
      */