How to set session validity period in php

How to set the session validity period in php: You can set the session life cycle by setting session.gc_maxlifetime. session.gc_maxlifetime refers to setting the maximum expiration time of the session.

In PHP, the life cycle of the Session is mainly set by setting session.gc_maxlifetime.

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session.gc_maxlifetime refers to setting the maximum expiration time of the session, which means that PHP will perform its garbage collection according to a certain probability Mechanism, this mechanism refers to judging whether the current time minus the last modification time of the session file is greater than session.gc_maxlifetime, and if so, delete the session file.

Code example:

<?php 
ini_set(&#39;session.gc_maxlifetime&#39;, 3600); //设置时间 
ini_get(&#39;session.gc_maxlifetime&#39;);//得到ini中设定值 
?>

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An encapsulated function is provided below for reference only.

The code is as follows:

<?php 
function start_session($expire = 0) 
{ 
 if ($expire == 0) { 
 $expire = ini_get(&#39;session.gc_maxlifetime&#39;); 
 } else { 
 ini_set(&#39;session.gc_maxlifetime&#39;, $expire); 
 } 
 if (emptyempty($_COOKIE[&#39;PHPSESSID&#39;])) { 
 session_set_cookie_params($expire); 
 session_start(); 
 } else { 
 session_start(); 
 setcookie(&#39;PHPSESSID&#39;, session_id(), time() + $expire); 
 } 
} 
?>

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