I need to find bug in a Wordpress site.
But I can't find the method (function) that the AJAX GET call runs on backend.
That's not admin part of website, but front end part of website.

I found the url where AJAX call is sent, but don't know how to find the method/function.

code for sending AJAX call looks like this

I have code for sending XMLHttpRequest something like this:

    var xhr = new XMLHttpRequest();
    xhr.open("GET", "http://themes.qnimate.com/qplog/wp-admin/admin-ajax.php?action=logged_in_check");
    xhr.onload = function(){

There is nothing like add_action() on frontend.

What could you advise? Any technics, advices?

  • firstly use the network monitor to look which AJAX call is send, e.g. with firefox : developer.mozilla.org/en-US/docs/Tools/Network_Monitor
    – mmm
    Apr 13, 2017 at 21:00
  • hello, I found the url where AJAX call is sent, but don't know how to find the method/function. Apr 13, 2017 at 21:07
  • then edit your question and details what you have seen, without more informations it's hard to help you
    – mmm
    Apr 13, 2017 at 21:10
  • Do you have access to the source code of that site?
    – Tom J Nowell
    Aug 12, 2021 at 14:58

1 Answer 1


If the url is something like this admin-ajax.php?example_ajax_request=1&data=1234

The add_action function in the code would be wp_ajax_nopriv_example_ajax_request

So, try to grep the whole of your theme directory or plugin directory for the text.

Example: grep -r 'wp_ajax_nopriv_example_ajax_request' *

The second parameter of the add_action is the function name you're looking for.

See https://codex.wordpress.org/AJAX_in_Plugins#Ajax_on_the_Viewer-Facing_Side for example of how it works.

  • NO it's not admin part of website. It's just front end part of website. Apr 14, 2017 at 7:27
  • I am not talking about the admin part of the website, that is why added nopriv to the function. It is for frontend only.
    – Mohit
    Apr 14, 2017 at 13:13
  • For more details on nopriv refer to codex.wordpress.org/Plugin_API/Action_Reference/…
    – Mohit
    Apr 14, 2017 at 13:25
  • @YuriiHalapup frontend AJAX requests that use that API will still call wp-admin/admin-ajax.php, even for logged out users on the homepage
    – Tom J Nowell
    Aug 12, 2021 at 14:59

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