Ajax in Wordpress plugin

Question

I am creating a simple wordpress plugin and trying to use AJAX, but I always get 0 in ajax response.

<script type="text/javascript" >
jQuery(document).ready(function($) {

var data = {
    action: 'my_action',
    whatever: '1234'
};


jQuery.post("http://localhost/taichi/wp-admin/admin-ajax.php", data,   function(response) {
    alert(response);
});
});
 </script>
<?php
add_action('wp_ajax_my_action', 'my_action_callback');
add_action( 'wp_ajax_nopriv_my_action', 'my_action_callback' ); 




function my_action_callback() {

echo "test";
die();

}

what am I doing wrong?

Answer 1

You have to put the add_action at the complete bottom of your file or else it won't find the callback function

Answer 2

Try to change :

jQuery.post("http://localhost/taichi/wp-admin/admin-ajax.php", data,   function(response)

To :

jQuery.post(ajaxurl, data, function(response) 

And check if it is working on the admin side first. It should work fine.