CURL获取重定向URL

Question

使用CURL获取下面链接重定向URL：
http://www.amazon.com/Bengoo-Portable-Desktop-Electric-Rechargeable/dp/tech-data/B01F70ZGYW%3FSubscriptionId%3DAKIAJWXT2MCY6ZQDW7VQ%26tag%3DASSOCIATETAG%26linkCode%3Dsp1%26camp%3D2025%26creative%3D386001%26creativeASIN%3DB01F70ZGYW
我抓取到重定向后的链接还是这条url。
而实际的URL为：
http://www.amazon.com/dp/B01F70ZGYW?_encoding=UTF8&SubscriptionId=AKIAJWXT2MCY6ZQDW7VQ&showDetailTechData=1&tag=ASSOCIATE#technical-data

Answer 1

$url = "http://www.amazon.com/Bengoo-Portable-Desktop-Electric-Rechargeable/dp/tech-data/B01F70ZGYW%3FSubscriptionId%3DAKIAJWXT2MCY6ZQDW7VQ%26tag%3DASSOCIATETAG%26linkCode%3Dsp1%26camp%3D2025%26creative%3D386001%26creativeASIN%3DB01F70ZGYW";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, TRUE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, "Fiddler");
curl_setopt($ch, CURLOPT_HEADER, TRUE);
$response = curl_exec($ch);
curl_close($ch);
preg_match_all('/^Location:(.*)$/mi', $response, $matches);

echo ! empty($matches[1]) ? trim($matches[1][0]) : 'No redirect found';

Answer 2

    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);