Convert relative path to absolute path

Convert relative path to absolute path

//Convert relative path to absolute path
function relative_to_absolute($content, $feed_url) {
preg_match('/(http|https|ftp):///', $feed_url, $protocol );
$server_url = preg_replace("/(http|https|ftp|news):///", "", $feed_url);
//Open source OSPhP.COM.CN
$server_url = preg_replace("// .*/", "", $server_url);
 if ($server_url == '') {
 return $content;
 }
 if (isset($protocol[0])) {
//Open source code OSPhP. COm.CN
$new_content = preg_replace('/href="//', 'href="'.$protocol[0].$server_url.'/', $content);
$new_content = preg_replace('/src ="//', 'src="'.$protocol[0].$server_url.'/', $new_content); //Open source OSPhP.COM.CN
 } else {
$new_content = $content;
 }
 return $new_content;
}
?>