CURL是需要設置curl_setopt 和curl_getinfo纔可以獲取 Location:重定向
//curl的百度百科
$url = 'http://www.baidu.com/link?url=77I2GJqjJ4zBBpC8yDF8xDhiqDSn1JZjFWsHhEoSNd85PkV8Xil-rckpQ8_kjGKNNq';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
// 不需要頁面內容
curl_setopt($ch, CURLOPT_NOBODY, 1);
// 不直接輸出
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// 返回最後的Location
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_exec($ch);
$info = curl_getinfo($ch,CURLINFO_EFFECTIVE_URL);
curl_close($ch);
echo '真實url爲:'.$info;