Laravel - Controllers

Restful Resource Controllers

Often when creating an application, we need to perform CRUD (Create, Read, Update, Delete) operations . Laravel makes this job easy for us. Just create a controller and Laravel will automatically provide all methods for CRUD operations. You can also register a single route for all methods in the route.php file.

example

Step 1 − Create a MyController controller by running the following command.

php artisan make:controller MyController

Step 2 - Add the following code to

The file is app/Http/Controllers/MyController.php .

app/Http/Controllers/MyController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class MyController extends Controller {
   public function index() {
      echo 'index';
   }
   public function create() {
      echo 'create';
   }
   public function store(Request $request) {
      echo 'store';
   }
   public function show($id) {
      echo 'show';
   }
   public function edit($id) {
      echo 'edit';
   }
   public function update(Request $request, $id) {
      echo 'update';
   }
   public function destroy($id) {

echo 'destroy';
   }
}

Step 3 − Add the following line of code to app/Http/rout.php file .

app/http/routes.php

Route::resource('my','MyController');

Step 4 − We now register all the methods of MyController by registering the controller with the resource. Below is a table of actions performed by the resource controller.

Step 5 − Try the URLs shown in the following table.

Implicit Controllers

Implicit controllers allow you to define one route to handle each action in a controller. You can define it in the route.php file using the Route: controller method as shown below.

Route::controller('base URI','<class-name-of-the-controller>');

Replace <class-name-of-the-controller> with the class name you gave your controller.

The controller method name must start with an HTTP verb, like get or post. If you start with get it will only process the get request and if it starts with post it will process the post request. Once you can use the HTTP verb, you can give any name to the method, but it must match the version of the URI in the header case.

example

Step 1 − Run the below command to create a controller. We have kept the class name ImplicitController . You can give any name of your choice.

php artisan make:controller ImplicitController --plain

Step 2 − After successful completion of step 1, you will get the following output −

Step 3 - Copy the following code into

The file is app/Http/Controllers/ImplicitController.php .

app/Http/Controllers/ImplicitController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class ImplicitController extends Controller {
   /**
      * Responds to requests to GET /test
   */
   public function getIndex() {
      echo 'index method';
   }
   
   /**
      * Responds to requests to GET /test/show/1
   */
   public function getShow($id) {
      echo 'show method';
   }
   
   /**
      * Responds to requests to GET /test/admin-profile
   */
   public function getAdminProfile() {
      echo 'admin profile method';
   }
   
   /**
      * Responds to requests to POST /test/profile
   */
   public function postProfile() {
      echo 'profile method';
   }
}

Step 4 − Add the following line to the app/Http/rout.php file to route requests to the specified controller.

app/http/routes.php

Route::controller('test','ImplicitController');

Constructor Injection

The Laravel service container is used to resolve all Laravel controllers. As a result, you can print any dependencies your controller might need in its constructor. The dependencies will be automatically resolved and injected into the controller instance.

example

Step 1 − Add the following code to app/Http/rout.php file .

app/http/routes.php

class MyClass{
   public $foo = 'bar';
}
Route::get('/myclass','ImplicitController@index');

Step 2 - Add the following code to

The file is app/Http/Controllers/ImplicitController.php .

app/Http/Controllers/ImplicitController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class ImplicitController extends Controller {
   private $myclass;
   
   public function __construct(\MyClass $myclass) {
      $this->myclass = $myclass;
   }
   public function index() {
      dd($this->myclass);
   }
}

Step 3 − Visit the following URL to test the constructor injection.

http://localhost:8000/myclass

Step 4 − The output will look as shown in the following image.

Method Injection

In addition to constructor injection, you can also inject hints depending on your controller's action methods.

example

Step 1 − Add the following code to app/Http/rout.php file .

app/http/routes.php

class MyClass{
   public $foo = 'bar';
}

Route::get('/myclass','ImplicitController@index');

Step 2 - Add the following code to

The file is app/Http/Controllers/ImplicitController.php .

app/Http/Controllers/ImplicitController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class ImplicitController extends Controller {
   public function index(\MyClass $myclass) {
      dd($myclass);

}
} 

Step 3 − Visit the following URL to test the constructor injection.

http://localhost:8000/myclass

This will give the following result −