How to set the session expiration time in php

Example: use cooikes

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<? Php Session_start (); // Save for one day $ LifeTime = 24*3600; Setcookie (session_name (), session_id (), time () + $ lifeTime ,"/"); ?>

PHP5 Session also provides a function session_set_cookie_params (); to set the lifetime of PHP5 Session. This function must be called before the session_start () function is called:

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<? Php // Save www.111cn.net for one day $ LifeTime = 24*3600; Session_set_cookie_params ($ lifeTime ); Session_start (); ?>

In php, another ini_set can be used to set session. gc_maxlifetime to set the Session lifecycle. For example:

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<? Php Ini_set ('session. Gc_maxlifetime', 3600); // Set the time Ini_get ('session. Gc_maxlifetime'); // obtain the value set in ini. ?>

The following provides a function encapsulated by someone else, but I have not tested it. It is for reference only:

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<? Php Function start_session ($ expire = 0)     { If ($ expire = 0 ){ $ Expire = ini_get ('session. Gc_maxlifetime '); } Else { Ini_set ('session. Gc_maxlifetime', $ expire );     }      If (empty ($ _ COOKIE ['phpsessid ']) { Session_set_cookie_params ($ expire ); Session_start (); } Else { Session_start (); Setcookie ('phpsessid ', session_id (), time () + $ expire );     }     } ?>

Usage:

Add start_session (600); // expire after 600 seconds.