Title: Problem coding AJAX in WordPress Plugin
Last modified: August 31, 2016

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# Problem coding AJAX in WordPress Plugin

 *  [dahayeser](https://wordpress.org/support/users/dahayeser/)
 * (@dahayeser)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/problem-coding-ajax-in-wordpress-plugin/)
 * Hi guy’s, banging my head against a wall here trying to get AJAX to work in a
   wordpress plugin that I am writing. Any help would be massively appreciated!
 * Thanks in advance,
    Sean
 * Here is where I am at –
 * Below is an excerpt from my main plugin file where I register the JavaScript 
   file I use to make the ajax call and set up my ajax handle. My understanding 
   is the wp_localize_script should pull the PHP file I use to process the ajax 
   request in to the wordpress fold and allow it access all the WordPress functions.
   This is where I think my issue lies.
 *     ```
       add_action( 'wp_enqueue_scripts', 'so_enqueue_scripts' );
   
       function so_enqueue_scripts(){
          wp_register_script( 'ajaxHandle', plugins_url() . '/custom-registration/js/call_ajax.js', array('jquery'), false, true );
          wp_enqueue_script( 'ajaxHandle' );
          // Localise the PHP script that will handle the AJAX request
          wp_localize_script( 'ajaxHandle', 'ajax_object', array( 'ajaxurl' => plugins_url( 'custom-registration/process-ajax.php' ) ) );
        }
       ```
   
 * Below is the JS file that makes the call –
    /custom-registration/js/call_ajax.
   js
 *     ```
       jQuery(document).ready( function($){
       	$('form.billing-form').submit(function(event) {
   
       	event.preventDefault();
       	var data = {
       	    action:  'my_ajax_action',
       	    name:    'my name',
       	    message: 'my message'
       	}
   
       	$.ajax({
       		url: ajax_object.ajaxurl,
       		type:"POST",
       		data: data,
       		success: function( data ) {
       			alert( 'AJAX Success');
       		},
       		error: function( ) {
       			alert( 'AJAX failed');
       		}
       	})
       });
       ```
   
 * Here is my PHP file that should process the request –
    /custom-registration/process-
   ajax.php
 *     ```
       add_action('wp_ajax_my_ajax_action', 'my_ajax_action_callback');
       function my_ajax_action_callback() {
           echo 'It works!';
           wp_die();
       }
       ```
   
 * The PHP file gets hit but a fatal error is thrown because –
 * PHP LOG
 * `Call to undefined function add_action()`
 * add_action() is a wordpress function and my process-ajax.php mustn’t be wired
   up correctly to access the WP functionality.

Viewing 1 replies (of 1 total)

 *  Moderator [bcworkz](https://wordpress.org/support/users/bcworkz/)
 * (@bcworkz)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/problem-coding-ajax-in-wordpress-plugin/#post-7083357)
 * All WP AJAX calls must be routed through admin-ajax.php. The localize script 
   function only outputs JS assignments in the page head, it has nothing to do with
   WP PHP functions being available.
 * The AJAX request must have an ‘action’ value, which is used to build and apply
   a dynamic action hook. Your AJAX handler code is added as a callback to this 
   action. More detailed information begins here:
    [https://developer.wordpress.org/plugins/javascript/](https://developer.wordpress.org/plugins/javascript/)
   and continues on to a code summary.

Viewing 1 replies (of 1 total)

The topic ‘Problem coding AJAX in WordPress Plugin’ is closed to new replies.

## Tags

 * [ajax](https://wordpress.org/support/topic-tag/ajax/)
 * [plugin-development](https://wordpress.org/support/topic-tag/plugin-development/)

 * In: [Hacks](https://wordpress.org/support/forum/plugins-and-hacks/hacks/)
 * 1 reply
 * 2 participants
 * Last reply from: [bcworkz](https://wordpress.org/support/users/bcworkz/)
 * Last activity: [10 years, 3 months ago](https://wordpress.org/support/topic/problem-coding-ajax-in-wordpress-plugin/#post-7083357)
 * Status: not resolved

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