复制代码 代码如下:

$url = "http://sinaurl.cn/hbdsU5";

echo unshorten($url);

function unshorten($url) {

$url = trim($url);

$headers = get_headers($url);

$location = $url;

$short = false;

foreach($headers as $head) {

if($head=="HTTP/1.1 302 Found") $short = true;

if($short && startwith($head,"Location: ")) {

$location = substr($head,10);

}

}

return $location;

}

function startwith($Haystack, $Needle){

return strpos($Haystack, $Needle) === 0;

}