clear-nginx-cache-code-snippet.php

<?php
// This code snippet will purge the Nginx cache using the Nginx Helper if it's installed and active on the site
// You can add this to MainWP Code Snippets 
// For the MainWP Snippet Type, choose "Return info from Child Sites"
// This may also work with ManageWP Code Snippets
global $nginx_purger;

if(isset($nginx_purger))
{
  $nginx_purger->purge_all();
}