Ajax base Form validation?

[eluser]boony[/eluser]
Hi,

Excellent post, this basic setup for form validation is valuable info for any ci newbie looking to integrate some ajax functionality.

However, again for any newbie it may help to explain the IS_AJAX constant, as this is not part of the core constants set up.

The following sript should be placed at the bottom of the application/config/constants.php file.

Code:

// Define Ajax Request
define('IS_AJAX', isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');

Hope this helps.