formatting

src/Illuminate/Encryption/EncryptionServiceProvider.php

@@ -18,22 +18,29 @@ public function register()
         $this->app->singleton('encrypter', function ($app) {
             $config = $app->make('config')->get('app');
 
-            $key = $config['key'];
-
-            if (is_null($key) || $key === '') {
-                throw new RuntimeException(
-                    'The application encryption key is missing. Run php artisan key:generate to generate it.'
-                );
-            }
-
             // If the key starts with "base64:", we will need to decode the key before handing
             // it off to the encrypter. Keys may be base-64 encoded for presentation and we
             // want to make sure to convert them back to the raw bytes before encrypting.
-            if (Str::startsWith($key, 'base64:')) {
+            if (Str::startsWith($key = $this->key($config), 'base64:')) {
                 $key = base64_decode(substr($key, 7));
             }
 
             return new Encrypter($key, $config['cipher']);
         });
     }
+
+    /**
+     * Extract the encryption key from the given configuration.
+     *
+     * @param  array  $config
+     * @return string
+     */
+    protected function key(array $config)
+    {
+        return tap($config['key'], function ($key) {
+            throw_if(empty($key), new RuntimeException(
+                'No application encryption key has been specified.'
+            ));
+        });
+    }
 }

src/Illuminate/Foundation/helpers.php

@@ -827,38 +827,6 @@ function storage_path($path = '')
     }
 }
 
-if (! function_exists('throw_if')) {
-    /**
-     * Throw the given exception if the given boolean is true.
-     *
-     * @param  bool  $boolean
-     * @param  \Throwable  $exception
-     * @return void
-     */
-    function throw_if($boolean, $exception)
-    {
-        if ($boolean) {
-            throw $exception;
-        }
-    }
-}
-
-if (! function_exists('throw_unless')) {
-    /**
-     * Throw the given exception unless the given boolean is true.
-     *
-     * @param  bool  $boolean
-     * @param  \Throwable  $exception
-     * @return void
-     */
-    function throw_unless($boolean, $exception)
-    {
-        if (! $boolean) {
-            throw $exception;
-        }
-    }
-}
-
 if (! function_exists('trans')) {
     /**
      * Translate the given message.

src/Illuminate/Support/helpers.php

@@ -887,6 +887,38 @@ function tap($value, $callback = null)
     }
 }
 
+if (! function_exists('throw_if')) {
+    /**
+     * Throw the given exception if the given boolean is true.
+     *
+     * @param  bool  $boolean
+     * @param  \Throwable  $exception
+     * @return void
+     */
+    function throw_if($boolean, $exception)
+    {
+        if ($boolean) {
+            throw $exception;
+        }
+    }
+}
+
+if (! function_exists('throw_unless')) {
+    /**
+     * Throw the given exception unless the given boolean is true.
+     *
+     * @param  bool  $boolean
+     * @param  \Throwable  $exception
+     * @return void
+     */
+    function throw_unless($boolean, $exception)
+    {
+        if (! $boolean) {
+            throw $exception;
+        }
+    }
+}
+
 if (! function_exists('title_case')) {
     /**
      * Convert a value to title case.