php简单的会话类代码

<?php
class session
{
static $sessionObject;
/* $_SESSION[user] == 0 , dont work .
* == 1 , he is really user .
*/
private function __construct()
{
if(! ( isset($_SESSION[user]) && $_SESSION[user]==0 ))
session_set_cookie_params(3600);

session_start(); //Initialize14 }15 private function __clone()
{
}
public static function getObject()
{
if(! self::$sessionObject instanceof self)
$sessionObject = new session() ;

return $sessionObject;
}

public function set_false()
{
$_SESSION[user] = 0 ; // for PHP>=5
}
public function set_true()
{
if( isset($_SESSION[user]) )
$_SESSION[user] = 1 ;
else
$this->error();
}
public function get_status()
{
return $_SESSION[user];
}
public function end_session()
{
session_destroy();
}
public function error()
{

}
}
?>

$session = session::getObject();
if($session->get_status())
// .... the user is really
else
// ....