I have a very simple plugin with a javascript file and a PHP file. I want to call the PHP file from my javascript code and get the output. The javascript functions is something like the following:

function img_upload(){

        var ajax = new XMLHttpRequest();           
        ajax.open('GET', 'http://My_Domain_Name.com/wp-content/plugins/My_Plugin/auth.php', false);

    if (ajax.status === 200) {



and the PHP file which returns the results:

echo $token;
function Get_Token()
   //Do some stuff
   return $token;

both files (auth.php and myjs.js) are in the root directory of the plugin.


If I use the domain name I can call the php file in ajax.open() and get the results, but I know this is not the right way to do that. How can I call the php file inside my javascrip code via ajax.open('path_to_php') in Wordpress properly without indicating the domain name?


Here's an example:

Use this sample JavaScript code:

jQuery(document).on('click', '.some-element', function(e){
    var ipc = jQuery(this).data('collection-id');

        method: 'post',
        url: ipAjaxVar.ajaxurl,
        data: {
            collection_id: ipc,
            action: 'my_function',
    }).done(function(msg) {
        // Do something when done


PHP (include the function in your plugin, do not use a separate file):

// Include the JavaScript above in your plugin
wp_enqueue_script('main', plugins_url('js/jquery.main.js', __FILE__), array('jquery'), '', true);

wp_localize_script('main', 'ipAjaxVar', array(
    'ajaxurl' => admin_url('admin-ajax.php')

add_action('wp_ajax_my_function', 'my_function');


Add the PHP code to your main plugin file. Create a JavaScript file - js/jquery.main.js - and add the code above. That should do the trick.

  • May you please describe your codes a little more? I am newbie to plugins world. I need just a simple code. Where should I add wp_enqueue_script, wp_localize_script? – Sinai Aug 1 '18 at 15:42
  • I have updated my answer. Add the PHP code to your main plugin file. Create a JavaScript file - js/jquery.main.js - and add the code above. That should do the trick. – Ciprian Aug 1 '18 at 16:27

Use plugins_url() to get the location of site/wp-content/plugins:

ajax.open('GET', '<?php echo plugins_url(); ?>/My_Plugin/auth.php', false);

This will put the following HTML code in:

ajax.open('GET', 'http://my.domain.com/wp-content/plugins/My_Plugin/auth.php', false);

If your file is a full JavaScript file and not part of a template, you can make your JavaScript file in to a PHP file like so:

header('Content-Type: application/javascript'); //mark this PHP file as a JS file
var pluginUrl = '<?php echo plugins_url(); ?>';

ajax.open('GET', pluginUrl + '/My_Plugin/auth.php', false);

Save this with the name image_upload.js.php (or whatever you are naming it) and then just include it normally:

wp_enqueue_script('image_upload', plugins_url() . '/My_Plugin/image_upload.js.php');
  • As described in the question, the JavaScript is in a .js file. They can’t use PHP functions there. – Jacob Peattie Aug 1 '18 at 15:05
  • Please see my edit. You can inject PHP in to a JS file just fine so long as it is saved as a PHP file and included as a JS file. – Adam Mellen Aug 1 '18 at 15:06
  • I don't want to change the structure of my files. I mean I don't want to put javascipts in php file. I think I should somehow use admin-ajax.php for this purpose but I don't know how to do that? – Sinai Aug 1 '18 at 15:39
  • See my answer above. – Ciprian Aug 1 '18 at 16:27

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