Code to check webhooks

Webhookinbox.php

<?php
$postdata = http_build_query($_POST);

$opts = array('http' =>
    array(
        'method'  => 'POST',
        'header'  => 'Content-type: application/x-www-form-urlencoded',
        'content' => $postdata
    )
);

$context  = stream_context_create($opts);
$g = file_get_contents("<webhookinbox url>", FALSE, $context);