WordPress wp_ajax公开网址？

I would like to do an ajax request in my theme.

If I am login to the Back Office, the request does, but if I'm not logged in, the returns is null... What's the solution please ?

In my view :

$.ajax({
  type: "POST",
  url: 'http://www.mysite.com/wp-admin/admin-ajax.php',
  data: $('#EventForm').serialize()+'&action=event_form',
  success: function(response){
    if(response == 1){
      alert('ok');
    } else {
      alert('no ok');
  }
});

In the functions.php (works only if I am log in back Office)

add_action('wp_ajax_event_form', 'ajax_event_form');
function ajax_event_form(){
  global $wpdb; 
  ...
  echo true;
  die;
}

From the Codex: wp_ajax_nopriv_(action) executes for users that are not logged in. So, if you want it to fire on the front-end for both visitors and logged-in users, you can do this:

add_action('wp_ajax_my_action', 'my_action_callback');
add_action('wp_ajax_nopriv_my_action', 'my_action_callback');

Create a plugin and add this:

<?php
/*
 * Plugin Name:ajax
 */
function my_ajax_callback_function() {
    echo "hiii";
    print_r($_POST);
    exit();
}
add_action( 'wp_ajax_my_action_name', 'my_ajax_callback_function' );    
// If called from admin panel
add_action( 'wp_ajax_nopriv_my_action_name', 'my_ajax_callback_function' );

Create a js and add this:

(function($) {
    $(document).ready(function(e) {
        $.ajax({
            url: "<?php echo admin_url('admin-ajax.php'); ?>",
            type: 'POST',
            data: {
                action: "my_action_name","name":"hithin","age":"27"
            },
            success: function (data, textStatus, jqXHR) {
                console.log(data);
            }
        });
    }
})(jQuery);

The ajax request in WordPress works by classifying user in two categories

1) User with login privilege. 2) User without login privileges.

So if you are logged in(even as a subscriber) your ajax function will be triggered i.e.

add_action('wp_ajax_event_form', 'ajax_event_form');

this will call 'ajax_event_form' function.

To make this work for non-logged in users you will have to write this below your ajax action

add_action('wp_ajax_nopriv_event_form', 'ajax_event_form');

So your code will be like:

add_action('wp_ajax_event_form', 'ajax_event_form');
add_action('wp_ajax_nopriv_event_form', 'ajax_event_form');
function ajax_event_form(){
  global $wpdb; 
  ...
  echo true;
  die;
}