class Session{ /** * 設置session * @param String $name session name * @param Mixed $data session data * @param Int $expire 超時時間(秒) */ public static function set($name, $data, $expire=600){ $session_data = array(); $session_data['data'] = $data; $session_data['expire'] = time()+$expire; $_SESSION[$name] = $session_data; } /** * 讀取session * @param String $name session name * @return Mixed */ public static function get($name){ if(isset($_SESSION[$name])){ if($_SESSION[$name]['expire']>time()){ return $_SESSION[$name]['data']; }else{ self::clear($name); } } return false; } /** * 清除session * @param String $name session name */ private static function clear($name){ unset($_SESSION[$name]); } } demo.php session_start(); $data = '123456'; session::set('test', $data, 10); echo session::get('test'); // 未過時,輸出 sleep(10); echo session::get('test'); // 已過時