Introduction to two methods of modifying session survival time in PHP

This article introduces to you a summary (recommended) of commonly used functions and global variables in PHP. It has certain reference value. Friends in need can refer to it. Hope it helps.

Method 1: Modify the configuration file php.ini, the default is 1440, 24 minutes, you can modify

php.ini About Session related settings (open php.ini file, in the "[Session]" section):
1, session.use_cookies: The default value is "1", which means that the SessionID is passed by Cookie, otherwise it is passed by Query_String;
2, session.name : This is the variable name stored in SessionID. It may be passed by Cookie or Query_String. The default value is "PHPSESSID";
3. session.cookie_lifetime: This represents the time that SessionID is stored in the client cookie. The default is 0. , which means that the SessionID will be invalidated as soon as the browser closes it... It is because of this that the Session cannot be used permanently!
4. session.gc_maxlifetime: This is the time that Session data is stored on the server side. If this time is exceeded, the Session data will be automatically deleted!

Method 2: Set in the program, use the ini_set() function to set the session expiration time, but when the script execution ends, the setting is cleared and the php.ini file will not be modified in the true sense

session_start(); 
ini_set('session.gc_maxlifetime',21600);

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