For more information about the code obtained from an address, see Post solution.

For more information about the code obtained from an address, see the post. for example, if the video address of Tudou is: js.tudouui.combinplayer2olc_8.swf after direct access by ghost? For more information about the codes obtained from iid131686432 & am, see the post.
For example, potato video address: http://www.tudou.com/a/OpofdZOE_mI/&iid=131686432&resourceId=0_04_05_99/v.swf
After direct access:
http://js.tudouui.com/bin/player2/olc_8.swf?iid=131686432&swfPath=http://js.tudouui.com/bin/lingtong/SocialPlayer_79.swf&youkuId=XNjc0MTE5MDky&vcode=XNjc0MTE5MDky&tvcCode=-1&tag=null&title=%E7%AC%AC07%E8%AF%9D+%E8%80%8D%E9%98%B4%E9%99%A9%E2%80%A6%E2%80%A6%21%21&mediaType=vi&totalTime=1434760&hdType=3&hasPassword=0&nWidth=512&isOriginal=0&channelId=9&nHeight=288&banPublic=false&videoOwner=102599789&tict=2&tvcCode=-1&channelId=9&cs=6_480|482&k=&totalTime=1434760&panelRecm=http://css.tudouui.com/bin/lingtong/PanelRecm_9.swz&panelDanmu=http://css.tudouui.com/bin/lingtong/PanelDanmu_1.swz&panelEnd=http://css.tudouui.com/bin/lingtong/PanelEnd_11.swz&pepper=http://css.tudouui.com/bin/binder/pepper_17.png&panelShare=http://css.tudouui.com/bin/lingtong/PanelShare_7.swz&panelCloud=http://css.tudouui.com/bin/lingtong/PanelCloud_8.swz&prd=&autoPlay=false&listType=3&rurl=&resourceId=0_04_05_99&autostart=false&lid=0&aid=228258&aCode=OpofdZOE_mI&code=JH-1K_odtwE&snap_pic=http%3A%2F%2Fr1.ykimg.com%2F054104085301E3696A0A4F52041D537C&aopRate=0.001&p2pRate=0.95&adSourceId=81000&yjuid=1392279724827k3i&yseid=1392887009649TQcVcx&yseidtimeout=1392898462767&yseidcount=4&uid=null&juid=018h4v26uu19ca&vip=0
How can I use PHP to obtain the Accessed address and output it?
------ Solution --------------------

$url='http://www.tudou.com/a/OpofdZOE_mI/&iid=131686432&resourceId=0_04_05_99/v.swf';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_exec($ch);

$response = curl_exec($ch);

preg_match_all('/^Location:(.*)$/mi', $response, $matches);
curl_close($ch);

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