persistent error pzen_ajax_compare.php

[vapeshopmeuk]

1.5.5f

i keep getting a persistant error pzen_ajax_compare.php on line 27

PHP Warning: Invalid argument supplied for foreach() in C:\inetpub\Vapeshop.me.uk\pzen_ajax_compare.php on line 27

13         require('includes/application_top.php');
14        require(DIR_WS_MODULES . 'require_languages.php');
15         // get values
16         $action = $_POST['com_action'];
17         $selected = $_POST['compare_id'];
18         $compare_array = array();
19         $comp_images = '';
20         $compare_warning = '';
21         $comp_value_count = count($_SESSION['compare']);
22         // add new products selected
23         if ($action == 'add') {
24         if ($comp_value_count < COMPARE_VALUE_COUNT) {
25         $compare_array[] = $selected;
26         foreach ($_SESSION['compare'] as $c) {
27            if ($c != $selected) {
28                $compare_array[] = $c;
29            }
30        }
31        $_SESSION['compare'] = array_unique($compare_array);
32		$compare_warning = COMPARE_PRODUCTS_ADDED;
33    } else {
34        $compare_warning = COMPARE_ONETIME_ITEM_COMPARE;
35    }
36  }

can anyone see whats wrong ?????????????????????

[mc12345678]

Well, not 100% sure, but am wondering what existing values are present for the session variable for one, two is if some other variable should get set to what the session holds, and lastly it doesn't appear that anything special is done if there are no values for the session variable already assigned. What php version is being used?

[swguy]

Before the foreach statement add this:

if ((!isset($_SESSION['compare'])) || (!is_array($_SESSION['compare']))) $_SESSION['compare'] = array();

[vapeshopmeuk]

Thank you