udpu folder tree

plugin.php

<?php
/*
Plugin Name: udpu folder tree
Plugin URI: #
Description: для додавання використайте: [udpu_folder_tree path=""]
Author: Tgu
Version: 1.0.0
Author URI: #
*/

add_shortcode("udpu_folder_tree", function($atts, $content = null) {
	extract(shortcode_atts(array("path" => ''), $atts));
    $req = wp_remote_get('https://udpu.edu.ua/index.php?option=com_ajax&module=listdir&method=iframe&format=raw&path='.$path);

    if(is_wp_error($req)){
        return;
    }else{
        $dom = new DOMDocument;
        $dom->loadHTML('<meta charset="utf-8">' .$req['body']);

        $style = $dom->saveHTML($dom->getElementsByTagName('head')->item(0)->getElementsByTagName('style')->item(0));

        add_action('wp_footer', function(){
            ?>
            <script type="text/javascript">
                (function($){
                    $(document).ready(function(){
                        $(document).find('.rs_dir').on('click',function(){
                            $(this).find('>folder').toggleClass('open');
                        });
                    });
                })(jQuery);
            </script>
            <?php
        });

        return $style.$dom->saveHTML($dom->getElementsByTagName('body')->item(0));
    }
});

?>