In the PHP4.0 added to the session support, convenient for many of our programs, such as shopping cart and so on!
In many forums, the session is also used to process the user login, record the user name and password, so that users do not have to enter their own user name and password every time! However, the life of the general session is limited, if the user closed the browser, you can not save the session variables! So how can we achieve the permanent life of the session?
As you know, the session is stored on the server side, according to the client-provided SessionID to get the user's files, and then read the file, get the value of the variable, SessionID can use the client's cookie or Http1.1 protocol Query_ String (the "?" of the URL that is visited Later) to the server, and then the server reads the Session Directory ...
To achieve the permanent lifetime of the session, you first need to know about the php.ini settings for the session (open the PHP.ini file, in the [Session] section):
1, Session.use_cookies: The default value is "1", on behalf of SessionID using cookies to pass, the other is the use of query_string to pass;
2, Session.name: This is sessionid stored variable name, may be a cookie, it may be query_string to pass, the default value is "PHPSESSID";
3, Session.cookie_lifetime: This represents SessionID in the client cookie storage time, the default is 0, on behalf of the browser a close SessionID is void ... This is why the session cannot be used permanently!
4, Session.gc_maxlifetime: This is the session data in the server-side storage time, if more than this time, then the session data will be automatically deleted!
There are a lot of settings, but that's what this article is about, and here's how to use the permanent session principle and procedure.
As mentioned earlier, the server through the SessionID to read the session data, but the General browser transfer of SessionID after the browser is closed, then we only need to set SessionID and save the human, not can ...
If you have permission to operate the server, it is very, very simple to set up, just the following steps:
1, the "Session.use_cookies" set to 1, open the cookie storage SessionID, but the default is 1, generally do not change;
2, the "Session.cookie_lifetime" to the positive infinity (of course, no positive infinity parameters, but 999999999 and positive infinity is no difference);
3, the "Session.gc_maxlifetime" set to "Session.cookie_lifetime" the same time;
Once setup is complete, open the editor and enter the following code:
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