I am trying to find a universal way to expand most if not all of the shortened URLs out there. I know short URLs such as bit.ly, TinyURL, goo.gl, etc use the 302 redirection method to redirect you to another site. How can I make a HEAD request to the shortened URL in php and get the "Location" part of the header?
Please help me with this.
Thanks
Forget it everyone. :) With some internet searching, I found this:
expanding short url to original url using PHP and CURL — Hasin Hayder
It shows me exactly how to do this.
You need to use CURL. You can set a callback function that fires to read headers.
//register a callback function which will process the headers
curl_setopt($ch, CURLOPT_HEADERFUNCTION, 'readHeader');
function readHeader($ch, $header)
{
global $location;
// we have to follow 302s automatically or cookies get lost.
if (eregi("Location:",$header) )
{
$location= substr($header,strlen("Location: "));
}
return strlen($header);
}
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