如何将SESSION变量传递给父目录中的页面？(How to pass SESSION variable to a page in the parent directory?)

 在我的网站上，我想有几个子域名。 为给定子域创建上下文的文件存储在相应的子目录中。 
 
 有时我需要链接到不属于子域的文件。 
 
 例如，在我的“subdomain1.mysite.org”上，我有一个指向“www.mysite.org/login.php”的链接。 “login.php”存储在包含与子域对应的所有子目录的目录中。 
 
 如果我以这种方式链接到“www.mysite.org/login.php”：href href='../login.php' ，它不起作用。 因为浏览器试图访问“subdomain1.mysite.org/../login.php”。 为了解决这个问题，我以这种方式建立链接： href='http://www.mysite.org/login.php'但我认为通过这种方式我无法将会话变量传递给新页面（可以是案子？）。 
 
 所以，我的问题是我找不到将会话变量传递到位于父目录（或位于另一个域的页面）的页面的方法。 有谁知道如何解决这个问题？ 
 
 添加 
 
 按照建议，我厌倦了使用session_set_cookie_params来解决问题。 但我仍然无法达到预期的效果。 在更多细节中，我执行以下操作： 
 
 我在index.php文件中为subdomain1.mysite.org生成内容我使用以下代码： 
 
session_set_cookie_params(24*60*60,'/','.mysite.org');
session_start();
$_SESSION['page'] = $PHP_SELF;
 
 比以后，在同一个文件中我链接到我的一个页面（我想问题可以在这里）。 我通过以下方式创建链接： 
 
href='http://www.mysite.org/login.php'
 
 在login.php文件中，我有以下代码： 
 
session_set_cookie_params(24*60*60,'/','.mysite.org');
session_start();
print "a".$_SESSION['page']."b";
 
 结果，“a”和“b”之间没有任何内容。 所以，我仍然无法将会话变量从一个页面传递到另一个页面。 有人知道我做错了什么吗？ 
 
 添加2我必须说如果我添加以下行我的问题就解决了： session_name("some_name"); 
 
 之前 
 
 session_set_cookie_params 。 

On my web site I would like to have several sub-domains. Files that create context for a given sub-domain are stored in corresponding sub-directory. 
 
Sometimes I need to link to the files that do not belong to the sub-domain.
 
For example, on my "subdomain1.mysite.org" I have a link to "www.mysite.org/login.php". The "login.php" is stored in the directory that contains all subdirectories corresponding to the sub-domains.
 
If I make the link to the "www.mysite.org/login.php" in this way: href='../login.php', it does not work. Because browser tries to access "subdomain1.mysite.org/../login.php". To solve this problem I make the link in this way: href='http://www.mysite.org/login.php' but I think that in this way I cannot pass my session variables to the new page (can it be the case?).
 
So, my problem is that I cannot find a way to pass session variables to the page that is located in the parent directory (or to the page that is located on another domain). Does anybody know how this problem can be solved?
 
ADDED
 
As recommended, I tired to use session_set_cookie_params to solve the problem. But I still cannot manage to get the desired result. In more details I do the following:
 
I have in the index.php file that generates content for subdomain1.mysite.org I use the following code:
 
session_set_cookie_params(24*60*60,'/','.mysite.org');
session_start();
$_SESSION['page'] = $PHP_SELF;
 
Than later, in the same file I make a link to one of my pages (I think problem can be here). I create the link in the following way:
 
href='http://www.mysite.org/login.php'
 
In the login.php file I have the following code:
 
session_set_cookie_params(24*60*60,'/','.mysite.org');
session_start();
print "a".$_SESSION['page']."b";
 
As the result there is nothing between "a" and "b". So, I still cannot pass the session variables from one page to another one. Does anybody know what I am doing wrong?
 
ADDED 2 I have to say that my problem is solved if I add the following line: session_name("some_name");
 
before the 
 
session_set_cookie_params.

原文：https://stackoverflow.com/questions/4948340