CODEWITHSUNDEEP
phplaravelinheritance
Steve
Steve

Reputation: 1672

Basic inheritance in laravel

I am very new to OOP. And i've read that a derived class can access the public and protected members of base class.

A.php

<?php
namespace App\Http\Controllers;
class A extends Controller
{
      public $x=5;
      public function index()
      {...}
}

and B.php

<?php
namespace App\Http\Controllers;
class B extends A
{
     public function index()
     {
          print_r($x);
     }
}

why is $x not accessed from derived class? I have this route:

 Route::get('/B/index','B@index');

I got the error:

undefined variable x.

Upvotes: 1

Views: 246

Answers (2)

hunglevan
hunglevan

Reputation: 109

Please change code as bellow. it will show result.

class A
{
      public $x=5; //or protected $x=5;
      public function index()
      {
        echo "A";
      }
}

class B extends A
{
    public function index()
    {
       echo $this->x;   
    }

}

$classB = new B();
$classB->index();

you can use :http://phptester.net/ to test online

I Hope help you

Upvotes: 3

Mayank Pandeyz
Mayank Pandeyz

Reputation: 26288

Make the following changes in your code:

class B extends A
{
     public function get()
     {
         echo $this->x;  // will echo the value in variable $x;
     }
}

$obj = new B;
$obj->get();

Upvotes: 3

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