wordpress.php

<?php
	add_action('pre_get_posts', function ($query) {
	    global $wp;
	    if (!is_admin() && $query->is_main_query()) :

	        if ($wp->request == '.custom-hidden-endpoint-wordpress-way-is-a-death-trap') {
                  			header('Content-Type: application/json');
				echo json_encode(array('hi' => 'mathias'));
				exit;
	        endif;

	

	   }


	    endif;
	});