Wordpress AJAX doesn't work - response 0

Question

I want add AJAX support to my plugin and I have huge problem with this simple thing. WordPress isn\'t permitting me to use normal AJAX and I need to use WordPress version.

Answer 1

I see few problems here. Action should inside the data object, not as a jQuery Ajax parameter. Also in the callback function data is stored in $_POST variable.

function test_callback() {

    $whatever = $_POST['whatever'];
    echo $whatever;

    die();
}
add_action('wp_ajax_nopriv_fqtag', 'test_callback');
add_action('wp_ajax_fqtag', 'test_callback');

function print_js() {
    ?>