var ajaxurl = 'https://example.com/wp-admin/admin-ajax.php'; $.ajax({ url: ajaxurl, type: 'post', data: { action: 'register_user' ,"username": "arshia"}, success: function(response) { console.log(response); } });
<?php // ajax call to this function function register_user() { $username = $_POST['username']; echo $username; die(); } add_action('wp_ajax_register_user', 'register_user'); add_action('wp_ajax_nopriv_register_user', 'register_user'); ?>