php file_get_contents 接收 cookie
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file_get_contents receive cookies
提问by Louis W
Is it possible to receive the cookies set by the remote server when doing a file_get_contentsrequest?
做file_get_contents请求时是否可以接收远程服务器设置的cookies ？
I need php to do a http request, store the cookies, and then make a second http request using the stored cookies.
我需要 php 来执行 http 请求，存储 cookie，然后使用存储的 cookie 发出第二个 http 请求。
回答by Ja?ck
There's a magic variable for this, called $http_response_header; it's an array comprising all headers that were received. To extract the cookies you have to filter out the headers that start with Set-Cookie:.
为此有一个神奇的变量，称为$http_response_header; 它是一个包含收到的所有标头的数组。要提取 cookie，您必须过滤掉以Set-Cookie:.
file_get_contents('http://example.org');
$cookies = array();
foreach ($http_response_header as $hdr) {
if (preg_match('/^Set-Cookie:\s*([^;]+)/', $hdr, $matches)) {
parse_str($matches[1], $tmp);
$cookies += $tmp;
}
}
print_r($cookies);
An equivalent but less magical approach would be to use stream_get_meta_data():
一种等效但不那么神奇的方法是使用stream_get_meta_data()：
if (false !== ($f = fopen('http://www.example.org', 'r'))) {
$meta = stream_get_meta_data($f);
$headers = $meta['wrapper_data'];
$contents = stream_get_contents($f);
fclose($f);
}
// $headers now contains the same array as $http_response_header
回答by RageZ
you should use cURLfor that purpose, cURLimplement a feature called the cookie jar which permit to save cookies in a file and reuse them for subsequent request(s).
您应该cURL为此目的使用，cURL实现一个称为 cookie jar 的功能，它允许将 cookie 保存在文件中并在后续请求中重用它们。
Here come a quick code snipet how to do it:
这里有一个快速的代码片段如何做到这一点：
/* STEP 1. let's create a cookie file */
$ckfile = tempnam ("/tmp", "CURLCOOKIE");
/* STEP 2. visit the homepage to set the cookie properly */
$ch = curl_init ("http://somedomain.com/");
curl_setopt ($ch, CURLOPT_COOKIEJAR, $ckfile);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec ($ch);
/* STEP 3. visit cookiepage.php */
$ch = curl_init ("http://somedomain.com/cookiepage.php");
curl_setopt ($ch, CURLOPT_COOKIEFILE, $ckfile);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec ($ch);
note: has to be noted you should have the pecl extension (or compiled in PHP) installed or you won't have access to the cURL API.
注意：必须注意，您应该安装 pecl 扩展（或在 PHP 中编译），否则您将无法访问 cURL API。
回答by Laereom
I realize this is, late, but there is actually a way to at least receive individual cookies sent by the server.
我意识到这已经很晚了，但实际上有一种方法至少可以接收服务器发送的单个 cookie。
I'm assuming you know how to do the whole stream_create_context business to get your file_get_contents http request rolling, and you just need assistance actually setting the cookies.
我假设您知道如何完成整个 stream_create_context 业务来让您的 file_get_contents http 请求滚动，并且您只需要实际设置 cookie 的帮助。
After running file_get_contents on a url, the (unfortunately, non-associative) array $http_response_header is set.
在 url 上运行 file_get_contents 后，（不幸的是，非关联）数组 $http_response_header 被设置。
If the server is sending back a cookie, one of them will start with 'Set-Cookie: ', which you can extract with substr.
如果服务器发回一个 cookie，其中一个将以“Set-Cookie:”开头，您可以使用 substr 提取它。
However, at the moment, it appears to me that one can only access -one- Set-Cookie through this variable, which is a limitation I am currently trying to find a way to work around.
但是，目前，在我看来只能通过此变量访问 -one-Set-Cookie，这是我目前正在尝试寻找解决方法的限制。
回答by Darren Cook
Following on from Laereom's answer, here is how to get multiple cookies:
继 Laereom 的回答之后，以下是获取多个 cookie 的方法：
$cookies=array();
foreach($http_response_header as $s){
if(preg_match('|^Set-Cookie:\s*([^=]+)=([^;]+);(.+)$|',$s,$parts))
$cookies[$parts[1]]=$parts[2];
}
NOTES:
笔记：
- I'm liberal with the regex; study the RFCs if you want to be more precise (i.e. to reject badly formed cookie data)
- You'll find path=, expires=, etc. in $parts[3]. I'd suggest
explode(';',$parts[3])then another loop to process it (because I'm not sure if there is a fixed order for these attributes. - If two cookies have the same name part, only the last survives, which appears to be correct. (I happen to have this situation in my current project; I assume it is a bug in the website I'm screen-scraping.)
- 我对正则表达式很自由；如果您想更精确（即拒绝格式错误的 cookie 数据），请研究 RFC
- 您将在 $parts[3] 中找到 path=、expires= 等。我建议
explode(';',$parts[3])再使用另一个循环来处理它（因为我不确定这些属性是否有固定的顺序。 - 如果两个 cookie 具有相同的名称部分，则只有最后一个存活，这似乎是正确的。（我在当前项目中碰巧遇到这种情况；我认为这是我正在抓取屏幕的网站中的错误。）
回答by soulmerge
You can either install and use the PECL extension for HTTP, or make sure your php installation was compiled with the optional curl library.
回答by Tim Lytle
I believe you co do it pretty easily with the Zend_Http object. Here is the documentation about adding cookiesto a request.
我相信你可以很容易地使用 Zend_Http 对象来完成。这是有关向请求添加 cookie的文档。
To get the cookies from a request (automatically retrieved I believe), just use getCookieJar()on the Zend_Http object.
要从请求中获取 cookie（我相信是自动检索的），只需getCookieJar()在 Zend_Http 对象上使用。
That should be easy to implement; however, the php manual has a user comment on how to deal with cookies using the http stream.
这应该很容易实现；然而，php 手册有一个关于如何使用 http 流处理 cookie的用户评论。
