OOP php variable scope

Question

I'm new in OOP php and i'm creating add to cart class but count variable is not working inside of add function and it is giving an error: "Notice: Undefined variable: count"

Here is my code :

<?php 
    Class cart{
        public $count=0;

        public function add(){
            @session_start();
            $_SESSION['count'] = $count++;
            echo $_SESSION['count'];
        }

        public function check(){
            if(isset($_POST['sub'])){
                $this->add();
            }
        }
    }

    $obj = new cart;
    $obj->check();
?>

Basheer Kharoti · Accepted Answer · 2015-11-19 14:11:00Z

2

Class property can be accessed with this keyword

 $_SESSION['count'] = $this->count++;

Comments

mario.van.zadel · Accepted Answer · 2015-11-19 14:16:47Z

0

You have to use

$_SESSION['count'] = $this->count++;

instead of

$_SESSION['count'] = $count++;

Notes:

1) If $count should not be accessible outside your class you should change the declaration to private $count=0;.

2) Do you really need property $check? In your current case you can remove $check property and use $_SESSION['count'] = isset($_SESSION['count']) ? $_SESSION['count']++ : 0 in your add method.

edited Nov 19, 2015 at 14:16

answered Nov 19, 2015 at 14:11

mario.van.zadel

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