Session,autoload (), related issues. Seek expert enlighten.

Session,__autoload (), question. Seek expert enlighten. -。 -
After I opened a session, I want to set the session's effective time, how to set! I changed the php.ini config file inside the Session.cache_expire = 1, no implementation ... Modified the session.gc_maxlifetime=10, and did not get the desired effect. Ask for advice-. -！



And also.......
PHP file Loaded __autoload ($class _name) {
}


I used AutoLoad () in the first file to introduce other files, and this method was used at the beginning of the second file. Then I instantiate the 2 classes in 3 files. Err:cannot redeclare __autoload () (previously declared in c:\appserv\www\test\autoload_test.php:1) in C:\AppServ\www\ test\include1.php on line 4
Concise Code:
File 1:
function __autoload ($class _name) {
Include $class _name. ". PHP ";
}
Class include1{}
?>
File 2:
function __autoload ($class _name) {
Include $class _name. ". PHP ";
}
Class include2{}
?>
File 3:
Include $class _name. ". PHP ";
}
$inculde 1=new include1 ();
$inculde 2=new Include2 ();
?>
Please advise.

------Solution--------------------
Second question you have declared this function in the third file, and you don't have to re-fame anywhere else.
------Solution--------------------
Session_cache_expire (1); Be sure to put it before session_start ()

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