I am using the Wordboot starters plugin to create my own plugin. This plugin uses the PHP singleton method to prevent multiple plugin initializations.

Right now, when a visitor sends a contact form, a pure Javascript XHR AJAX call is executed to handle the contact request.

Everything works fine but I noticed the singleton is not working properly since for each AJAX request the plugin is executing the __construct of the main Wordboot class. This means everytime when such request is executed, the whole plugin is initialized again!

I used the Wordpress REST API and the usual way wp_ajax for executing AJAX calls but both methods makes this behaviour.

I was wondering if someone could explain me more about this, and how I could prevent a new plugin initialization when an AJAX call is executed?

I'm using the latest version of Wordpress.

  • Can you provide the code you're using? A class written as a Singleton typically wouldn't have a __construct method.
    – Welcher
    Nov 14, 2017 at 0:35
  • 1
    Each AJAX request is a whole new request, so everything has to be loaded again, else none of your AJAX handlers or REST endpoints would be present. I sense there's a misunderstanding here about how PHP handles requests, there's no persistant process running like on a Node.js server
    – Tom J Nowell
    Nov 14, 2017 at 0:48
  • @Welcher The code can be found at github.com/AlexandruDoda/Wordboot/blob/master/wordboot/…
    – Piet
    Nov 14, 2017 at 7:09
  • @TomJNowell So there have to be a way not to re-initialize the whole plugin on AJAX calls, right? Maybe some checking if the request is an AJAX request, if so, route it to the right controller is something like that?
    – Piet
    Nov 14, 2017 at 7:12
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    That’s not how PHP works. Every class is reinitialised on every request. If you’re doing something that should only ever be done once then it should be done in a plugin activation hook. Nov 14, 2017 at 8:26

1 Answer 1


So I think I found a sorth of solution. I just check each new request of the request wants to acces wp-json, if so load the ajax based on the url otherwise initialize the plugin. Seems to work so far.

Thanks for the replys guys!

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