php 从源 url 获取重定向的 url
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/17472329/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
php get url of redirect from source url
提问by michele
I have this link:
我有这个链接：
http://libero-news.it.feedsportal.com/c/34068/f/618095/s/2e34796f/l/0L0Sliberoquotidiano0Bit0Cnews0C12735670CI0Esaggi0Eper0Ele0Eriforme0Ecostituzionali0EChiaccherano0Ee0Eascoltano0Bhtml/story01.htm
http://libero-news.it.feedsportal.com/c/34068/f/618095/s/2e34796f/l/0L0Sliberoquotidiano0Bit0Cnews0C12735670CI0Esaggi0Eper0Ele0Eriforme0Ecostituzionali0EChiaccherano0Ee0Eascoltano0Bhtml/story01.htm
If you visit it, this become:
如果你访问它，它会变成：
http://www.liberoquotidiano.it/news/1273567/I-saggi-per-le-riforme-costituzionali-Chiaccherano-e-ascoltano.html
http://www.liberoquotidiano.it/news/1273567/I-saggi-per-le-riforme-costituzionali-Chiaccherano-e-ascoltano.html
How can I get the second link from the first?
如何从第一个链接获取第二个链接？
I have tried this but don't work, returning me the same first link:
我试过这个但不起作用，给我返回相同的第一个链接：
<?php
$url="http://libero-news.it.feedsportal.com/c/34068/f/618095/s/2e34796f/l/0L0Sliberoquotidiano0Bit0Cnews0C12735670CI0Esaggi0Eper0Ele0Eriforme0Ecostituzionali0EChiaccherano0Ee0Eascoltano0Bhtml/story01.htm";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$a = curl_exec($ch);
print_r($a);echo"<br>";
if(preg_match('#Location: (.*)#', $a, $r)){
$l = trim($r[1]);
echo $l;
}else echo "not working";
Thanks a lot.
非常感谢。
回答by Emrah Engin
Thanks to @king-isaacthe following code was tested and it works.
感谢@king-isaac，下面的代码已经过测试并且可以正常工作。
<?php
$url="http://libero-news.it.feedsportal.com/c/34068/f/618095/s/2e34796f/l/0L0Sliberoquotidiano0Bit0Cnews0C12735670CI0Esaggi0Eper0Ele0Eriforme0Ecostituzionali0EChiaccherano0Ee0Eascoltano0Bhtml/story01.htm";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); // Must be set to true so that PHP follows any "Location:" header
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$a = curl_exec($ch); // $a will contain all headers
$url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL); // This is what you need, it will return you the last effective URL
// Uncomment to see all headers
/*
echo "<pre>";
print_r($a);echo"<br>";
echo "</pre>";
*/
echo $url; // Voila
?>
回答by Isaac Hildebrandt
You can get the final URL of a request with curl_getinfo.
您可以使用curl_getinfo获取请求的最终 URL 。
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_exec($ch);
$url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
回答by Rachit Mangi
You can do it without using CURL. Made it simple and short.
您可以在不使用 CURL 的情况下做到这一点。让它简单而简短。
<?php
$url="http://libero-news.it.feedsportal.com/c/34068/f/618095/s/2e34796f/l/0L0Sliberoquotidiano0Bit0Cnews0C12735670CI0Esaggi0Eper0Ele0Eriforme0Ecostituzionali0EChiaccherano0Ee0Eascoltano0Bhtml/story01.htm";
$headers = @get_headers($url);
$final_url = "";
foreach ($headers as $h)
{
if (substr($h,0,10) == 'Location: ')
{
$final_url = trim(substr($h,10));
break;
}
}
echo $final_url;
?>
