CODEWITHSUNDEEP
phplaravel
Ramesh Pareek
Ramesh Pareek

Reputation: 1669

How does Laravel know that instance of the Request class contains the request currently being made by the user?

I am learning about dependency Injection in PHP, When I call this function in my Controller,

public function show(Request $request, $id)
    {
        $value = $request->session()->get('key');


    }

it works, but how does Laravel know that the Request class being injected contains the current request made by the user, or a new instance of the Request class?

Upvotes: 0

Views: 8012

Answers (1)

fubar
fubar

Reputation: 17388

If you look at public/index.php, you can see Laravel create the initial $request object by capturing the global request values.

// public/index.php ln 53
$request = Illuminate\Http\Request::capture()

The request is then passed to the Http\Kernel for handling, where the $request is subsequently passed to the sendRequestThroughRouter() function. In this function, the request instance is bound to the application container.

// vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php ln 138
$this->app->instance('request', $request);

Now, every time the application injects a request instance, for example into your controller method, it knows specifically which object to use.

Upvotes: 2

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