<?php class session { static $sessionobject; /* $_session['user'] == 0 , don't work . * == 1 , he is really user . */ private function __construct() { if(! ( isset($_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() { } } ?>
大概用法
example :
log in page : $session = session::getobject();
$session->set_ture(); // if $row['password'] ==
next page :
复制代码 代码如下:
$session = session::getobject();
if($session->get_status())
// .... the user is really
else
// ....
log out : $session = session::getobject();
$session->end_session();
由get_status()返回当前用户是否有效登录