Pings an URL to get it's status / header info
<li>?URL : get the status and returns a status header. ex:pingURL/?https://www.startpage.com</li>
<li>?infos=URL : get the header data in JSON format. ex:pingURL/?infos=https://www.startpage.com</li>

<li>?help: displays this text</li>
<li>?version: displays this api's version</li>
<li>?download: downloads the php api file</li>