Put those add_action
functions in your functions.php
file too. If they’re in header.php
, WordPress never registers them since header isn’t loaded in AJAX. Also, you don’t need that is_admin()
check. The theme’s header will never load in admin. So, your functions file should look like this:
add_action('wp_ajax_my_special_action', 'my_action_callback');
add_action('wp_ajax_nopriv_my_special_action', 'my_action_callback');
function my_action_callback() {
$whatever = $_POST['whatever'];
$whatever += 10;
echo 'whatever now equals: ' . $whatever;
die();
}
And the beginning of that part of your theme’s header file should look like this:
<?php
$_ajax = admin_url('admin-ajax.php');
?>
<script type="text/javascript" >
jQuery(document).ready(function($) {
Other than that, your code looks like it’s good to go!