Autoredirect to parent resource if resource not exists for MODx Revolution (plugin)

AutoRedirect.php

<?php

if ($modx->event->name == 'OnPageNotFound') {
    $config =  $modx->getConfig();
    $uri = explode('/', $_SERVER['REQUEST_URI']);
    
    array_shift($uri);
    array_pop($uri);
    
    return $modx->sendRedirect(
       $config['site_url'].implode('/', $uri)
    );
}