La variable Php $testing repite correctamente el archivo ajax, pero en html <?php echo $testing;?> no muestra nada.

html:

 <?php get_header(); ?> <script type="text/javascript"> var hrefValue; jQuery(document).ready(function($) { $('#bio-box').find('a').mouseover(function() { hrefValue = ($(this).attr('href')); $.ajax({ url: '/jakubtrz-portfolio/wp-admin/admin-ajax.php', data: { 'action': 'php_tutorial', 'php_test': hrefValue }, success: function(data){ console.log("sent") } }); }); }); </script> <?php echo $testing;?> <main id="primary" class="site-main"> <div class="container position-relative my-7"> <div class="row"> <div class="col-lg-6" id="bio-box"> <a href="http://localhost:8888/jakubtrz-portfolio/quod-si-ita-se-habeat-non-possit/">Example post link</a> <a href="http://localhost:8888/jakubtrz-portfolio/quid-ergo-aliud-intellege/">Example post link2</a> </div> <div class="col-lg-6"> <div class="featured-image"> <?php $post_id = url_to_postid($testing); echo get_the_post_thumbnail($post_id); ?> </div> </div> </div> </div> </main><!-- #main --> <?php get_footer();

funciones.php:

 function our_tutorial(){ if(isset($_REQUEST)){ $testing = $_REQUEST['php_test']; echo $testing; global $wpdb; $wpdb->insert( $wpdb->prefix.'lms_enroll', [ 'ID' => $testing ] ); } die(); } add_action('wp_ajax_php_tutorial', 'our_tutorial');