Undefined Index problem

[aarbrouk]

Hi,

 

I am fairly new to php and seem to be getting this common error...

 

"Notice: Undefined index: action in C:\wamp\www\Veetees\cart\cart.php on line 8"

 

When clicking on a link on one php page, to take me to a page called cart.php it shows this error message.

 

The script it is trying to run is:

 

<?php

session_start();

 

require "../connect.php";

 

$cart = $_SESSION['cart'];

$action = $_GET['action'];

 

Seems to not like the $action variable but I don't understand what undefined index means?? any help would be appreciated...

 

Many thanks.

[jcombs_31]

Means you are probably not passing the variable $action in the url.

[Daniel0]

The index is the key with which you access an element in an array. In your case of $_GET['action'] you are trying to retrieve the index called action on the array called $_GET.

 

In your case that index doesn't exist and you'll get a notice from PHP. You can use isset or key_exists to check this.

[aarbrouk]

thanks for your help, problem solved, I used an isset statement to get rid of the problem that i wasn't passing anything through...

 

Many thanks.