PHP 获取短网址跳转后的真实地址的实例

$url = 'http://t.cn/h5mwx';
$headers = get_headers($url, TRUE);

print_r($headers);

//输出跳转到的网址
echo $headers['Location'];

附：

Array
(
    [0] => HTTP/1.1 302 Moved Temporarily
    [Location] => http://www.111Cn.net
    [Content-Type] => Array
        (
            [0] => text/html;charset=UTF-8
            [1] => text/html;charset=utf-8
        )

    [Server] => Array
        (
            [0] => weibo
            [1] => BWS/1.0
        )

    [Content-Length] => Array
        (
            [0] => 203
            [1] => 16424
        )

    [Date] => Array
        (
            [0] => Thu, 12 Dec 2013 10:42:25 GMT
            [1] => Thu, 12 Dec 2013 10:42:25 GMT
        )

    [X-Varnish] => 2893360335
    [Age] => 0
    [Via] => 1.1 varnish
    [Connection] => Array
        (
            [0] => close
            [1] => Close
        )
)

$header = get_headers($url, 1);
if (strpos($header[0], '301') || strpos($header[0], '302')) {
if (is_array($header['Location'])) {
return $header['Location'][count($header['Location'])-1];
} else {
return $header['Location'];
}
} else {
return $url;
}