Hi James,
Thanks again for your help on this matter. Unfortunately I have been unable to work on the site for a while and so have only again been able to address this issue recently.
I asked the host as you suggested but they simply gave me this link:
http://wordpress.stackexchange.com/questions/97502/admin-ajax-is-returning-0
Short of adding the die(0) entry at the end of the page as is discussed (positively and negatively) I don´t actually see how to proceed to get this page running.
Please can you offer any further advice? If it helps I have copied the code from http://chrisrobinson.co.uk/wp-admin/admin-ajax.php
Many thanks,
Ben
<?php
/**
* WordPress AJAX Process Execution.
*
* @package WordPress
* @subpackage Administration
*
* @link https://codex.wordpress.org/AJAX_in_Plugins
*/
/**
* Executing AJAX process.
*
* @since 2.1.0
*/
define( 'DOING_AJAX', true );
if ( ! defined( 'WP_ADMIN' ) ) {
define( 'WP_ADMIN', true );
}
/** Load WordPress Bootstrap */
require_once( dirname( dirname( __FILE__ ) ) . '/wp-load.php' );
/** Allow for cross-domain requests (from the frontend). */
send_origin_headers();
// Require an action parameter
if ( empty( $_REQUEST['action'] ) )
die( '0' );
/** Load WordPress Administration APIs */
require_once( ABSPATH . 'wp-admin/includes/admin.php' );
/** Load Ajax Handlers for WordPress Core */
require_once( ABSPATH . 'wp-admin/includes/ajax-actions.php' );
@header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
@header( 'X-Robots-Tag: noindex' );
send_nosniff_header();
nocache_headers();
/** This action is documented in wp-admin/admin.php */
do_action( 'admin_init' );
$core_actions_get = array(
'fetch-list', 'ajax-tag-search', 'wp-compression-test', 'imgedit-preview', 'oembed-cache',
'autocomplete-user', 'dashboard-widgets', 'logged-in',
);
$core_actions_post = array(
'oembed-cache', 'image-editor', 'delete-comment', 'delete-tag', 'delete-link',
'delete-meta', 'delete-post', 'trash-post', 'untrash-post', 'delete-page', 'dim-comment',
'add-link-category', 'add-tag', 'get-tagcloud', 'get-comments', 'replyto-comment',
'edit-comment', 'add-menu-item', 'add-meta', 'add-user', 'closed-postboxes',
'hidden-columns', 'update-welcome-panel', 'menu-get-metabox', 'wp-link-ajax',
'menu-locations-save', 'menu-quick-search', 'meta-box-order', 'get-permalink',
'sample-permalink', 'inline-save', 'inline-save-tax', 'find_posts', 'widgets-order',
'save-widget', 'set-post-thumbnail', 'date_format', 'time_format', 'wp-fullscreen-save-post',
'wp-remove-post-lock', 'dismiss-wp-pointer', 'upload-attachment', 'get-attachment',
'query-attachments', 'save-attachment', 'save-attachment-compat', 'send-link-to-editor',
'send-attachment-to-editor', 'save-attachment-order', 'heartbeat', 'get-revision-diffs',
'save-user-color-scheme', 'update-widget', 'query-themes', 'parse-embed', 'set-attachment-thumbnail',
'parse-media-shortcode', 'destroy-sessions', 'install-plugin', 'update-plugin', 'press-this-save-post',
'press-this-add-category',
);
// Register core Ajax calls.
if ( ! empty( $_GET['action'] ) && in_array( $_GET['action'], $core_actions_get ) )
add_action( 'wp_ajax_' . $_GET['action'], 'wp_ajax_' . str_replace( '-', '_', $_GET['action'] ), 1 );
if ( ! empty( $_POST['action'] ) && in_array( $_POST['action'], $core_actions_post ) )
add_action( 'wp_ajax_' . $_POST['action'], 'wp_ajax_' . str_replace( '-', '_', $_POST['action'] ), 1 );
add_action( 'wp_ajax_nopriv_heartbeat', 'wp_ajax_nopriv_heartbeat', 1 );
if ( is_user_logged_in() ) {
/**
* Fires authenticated AJAX actions for logged-in users.
*
* The dynamic portion of the hook name, <code>$_REQUEST['action']</code>,
* refers to the name of the AJAX action callback being fired.
*
* @since 2.1.0
*/
do_action( 'wp_ajax_' . $_REQUEST['action'] );
} else {
/**
* Fires non-authenticated AJAX actions for logged-out users.
*
* The dynamic portion of the hook name, <code>$_REQUEST['action']</code>,
* refers to the name of the AJAX action callback being fired.
*
* @since 2.8.0
*/
do_action( 'wp_ajax_nopriv_' . $_REQUEST['action'] );
}
// Default status
die( '0' );
