使curl跟随重定向？

问题描述

我想让curl跟随重定向，但我不能让它工作正常。我有一个字符串，我想作为一个GET param发送到服务器，并得到结果的URL。

I'm trying to make curl follow a redirect but I can't quite get it to work right. I have a string that I want to send as a GET param to a server and get the resulting URL.

示例：

如果您访问该网址，将会将您重定向到www.wowhead.com/npc=257。我想curl将这个URL返回到我的PHP代码，以便我可以提取npc = 257并使用它。

If you go to that url it will redirect you to "www.wowhead.com/npc=257". I want curl to return this URL to my PHP code so that i can extract the "npc=257" and use it.

当前代码：

function npcID($name) {
    $urltopost = "http://www.wowhead.com/search?q=" . $name;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1");
    curl_setopt($ch, CURLOPT_URL, $urltopost);
    curl_setopt($ch, CURLOPT_REFERER, "http://www.wowhead.com");
    curl_setopt($ch, CURLOPT_HTTPHEADER, Array("Content-Type:application/x-www-form-urlencoded"));
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
    return curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
}

但这会返回 www.wowhead.com/search?q=

This however returns www.wowhead.com/search?q=Kobold+Worker and not www.wowhead.com/npc=257.

我怀疑PHP在外部重定向之前返回了 发生。如何解决此问题？

I suspect PHP is returning before the external redirect happens. How can I fix this?

推荐答案

要使cURL跟踪重定向，请使用：

To make cURL follow a redirect, use:

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

Erm ...我不认为你实际上正在执行卷曲... Try：

Erm... I don't think you're actually executing the curl... Try:

curl_exec（$ ch）;

。 ..设置选项后，在curl_getinfo（）调用之前。

...after setting the options, and before the curl_getinfo() call.

编辑：如果你只是想知道页面重定向到哪里，建议，只需使用Curl抓取标题并提取位置：来自他们的标题：

If you just want to find out where a page redirects to, I'd use the advice here, and just use Curl to grab the headers and extract the Location: header from them:

$ch = curl_init();
curl_setopt($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);
if(preg_match('#Location: (.*)#', $a, $r))
 $l = trim($r[1]);

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