Add docs

README.md

@@ -20,7 +20,6 @@ functions as: `time()`, `str_contains()`, `rand`, etc.
   - [Tracking calls](#tracking-calls)
 - [Global namespaced functions](#global-namespaced-functions)
   - [Internal functions](#internal-functions)
-    - [Workaround](#workaround)
     - [Internal function implementation](#internal-function-implementation)
 - [Restrictions](#restrictions)
   - [Data Providers](#data-providers)
@@ -76,6 +75,14 @@ The main idea is pretty simple: register a Listener for PHPUnit and call the Moc
 
 Here you have registered extension that will be called every time when you run `./vendor/bin/phpunit`.
 
+By default, all functions will be generated and saved into `/vendor/bin/xepozz/internal-mocker/data/mocks.php` file.
+
+Override the first argument of the `Mocker` constructor to change the path:
+
+```php
+$mocker = new Mocker('/path/to/your/mocks.php');
+```
+
 ### Register mocks
 
 The package supports a few ways to mock functions:
@@ -216,16 +223,22 @@ $traces = MockerState::getTraces('App\Service', 'time');
 ]
 ```
 
-## Global namespaced functions
+### Function signature stubs
 
-### Internal functions
+All internal functions are stubbed to be compatible with the original ones.
+It makes the functions use referenced arguments (`&$file`) as the originals do.
 
-Without any additional configuration you can mock only functions that are defined under any not global
-namespaces: `App\`, `App\Service\`, etc.
-But you cannot mock functions that are defined under global namespace or defined in a `use` statement, e.g. `use time;`
-or `\time();`.
+They are located in the [`src/stubs.php`](src/stubs.php) file.
 
-#### Workaround
+If you need to add a new function signature, override the second argument of the `Mocker` constructor:
+
+```php
+$mocker = new Mocker(stubPath: '/path/to/your/stubs.php');
+```
+
+## Global namespaced functions
+
+### Internal functions
 
 The way you can mock global functions is to disable them
 in `php.ini`: https://www.php.net/manual/en/ini.core.php#ini.disable-functions
@@ -269,6 +282,9 @@ $mocks[] = [
 ];
 ```
 
+> Keep in mind that leaving a global function without implementation will cause a recourse call of the function,
+> that will lead to a fatal error.
+
 ## Restrictions
 
 ### Data Providers

src/Mocker.php

@@ -8,8 +8,10 @@
 
 final class Mocker
 {
-    public function __construct(private string $path = __DIR__ . '/../data/mocks.php')
-    {
+    public function __construct(
+        private string $path = __DIR__ . '/../data/mocks.php',
+        private string $stubPath = __DIR__ . '/stubs.php',
+    ) {
     }
 
     public function load(array $mocks): void
@@ -52,7 +54,8 @@ public function generate(array $mocks): string
                 }
             }
         }
-        $stubs = require __DIR__ . '/stubs.php';
+
+        $stubs = require $this->stubPath;
 
         $outputs = [];
         $mockerConfigClassName = MockerState::class;