-require_once("include/oembed.php");
-require_once("include/event.php");
-require_once("library/markdown.php");
-require_once("include/html2bbcode.php");
-require_once("include/bbcode.php");
-require_once("library/html-to-markdown/HTML_To_Markdown.php");
+use Friendica\Content\Text\Markdown;
+use Friendica\Core\Addon;
+use Friendica\Core\System;
+use Friendica\Model\Contact;
+use Friendica\Network\Probe;
+use League\HTMLToMarkdown\HtmlConverter;
+
+require_once 'include/event.php';
+require_once 'include/html2bbcode.php';
+require_once 'include/bbcode.php';