javascript - The WordPress Ajax request returns 0 -

i can't figure out why nothing returned real beginner in ajax .. read lot of topics using ajax in woprdpress examples super advanced me here js code combo_checkout_irange.js

jquery(document).ready(function() {     jquery('#loader').hide();     jquery('#check-out-date').hide();     jquery('#check-in-date').change(function(){         jquery('#check-out-date').fadeout();         jquery('#loader').show();         jquery.ajax({             type: 'post',             url:myajax.ajaxurl,              data: {                 action : 'my_ajax_handler',                 parent_id: jquery("#check-in-date").val()             },             success: function(data){                 alert(data);                 jquery('#loader').hide();                 jquery('#check-out-date').show();                 jquery('#check-out-date').append(data);             }});             return false;         });         jquery('#check-out-date').change(function(){             alert(jquery('#check-out-date').val());         });     }); 

this wrote on function.php

note: should work in post type called "meetings"

add_action("wp_enqueue_scripts", function() {       if (is_single()) {         if (get_post_type() == 'meetings')         {             wp_enqueue_script('combo_checkout_irange', get_template_directory_uri() . '/js/combo_checkout_irange.js', array( 'jquery' ), '1.0' ,true);              $data_array = array(                 'ajaxurl' => admin_url( 'admin-ajax.php' )             );              wp_register_script( 'combo_checkout_irange', get_template_directory_uri() . '/js/combo_checkout_irange.js', array('jquery') );             wp_localize_script( 'combo_checkout_irange', 'myajax', $data_array );            }     } }); 

and ajax handler put inside single_meetings.php

add_action("wp_ajax_my_ajax_handler", "my_ajax_handler"); add_action("wp_ajax_nopriv_my_ajax_handler", "my_ajax_handler");  function my_ajax_handler() {                 if ( isset($_request["parent_id"]) ) {                      $id    = $_request["parent_id"];                      return $id;                      die();                  }              } 

you can't use return in ajax callback. code never gets die on line beneath. need echo value instead , use wp_die().

replace:

return $id; die(); 

with:

echo $id; wp_die();