CODEWITHSUNDEEP
phpcart
Savan
Savan

Reputation: 25

Undefined index error in a variable

My website is Career Tracker i want to add cart in my website in my local machine i got a error everytime so i tired.

i used XAMPP 1.8.1 [PHP: 5.4.7] i got a error everytime Notice: Undefined index: cart in functions.inc.php on line 4

i tired why my php veriable is undefined ?? $cart

this is my code i got error in 4 the line.

php undefined index error 

    <?php
function writeShoppingCart() 
{   
    $cart = $_SESSION['cart'];
    if (!$cart) 
    {
        return 'My Cart (0) Items';
    } 
    else 
    {
        // Parse the cart session variable
        $items = explode(',',$cart);
        $s = (count($items) > 1) ? 's':'';
        return '<a href="cart.php">'.count($items).' item'.$s.' in your cart</a></p>';
    }
}
?>

Upvotes: 0

Views: 910

Answers (4)

Rango
Rango

Reputation: 313

just change your code as: (i normaly use for this case)

<?php
function writeShoppingCart() 
{  
if(isset($_SESSION['cart']))
{ 
    $cart = $_SESSION['cart'];
    if (!$cart) 
    {
        return 'My Cart (0) Items';
    } 
    else 
    {
        // Parse the cart session variable
        $items = explode(',',$cart);
        $s = (count($items) > 1) ? 's':'';
        return '<a href="cart.php">'.count($items).' item'.$s.' in your cart</a></p>';
    }
}
}
?>

may this help you...

Upvotes: 0

Wren
Wren

Reputation: 633

Accessing a variable before you've set it will throw a Notice.

Try checking if it exists first using the isset() function.
Edited to note that you've also not started your session: session_start()

http://php.net/manual/en/function.isset.php
http://php.net/manual/en/function.session-start.php

Upvotes: 0

Oguzhan Ozel
Oguzhan Ozel

Reputation: 1164

You should check whether cart index exists or not.

$cart = isset($_SESSION['cart']) ? $_SESSION['cart'] : array();

Upvotes: 3

Daniel
Daniel

Reputation: 3806

Your session does not contain any index by the name "cart"

To make sessions available over multiple pages you need to activate sessions before any output by using the session_start function.

Upvotes: 0

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