<?php class session { public static function start() { session_start(); } public static function unset() { session_unset(); } public static function destroy() { session_destroy(); } public static function set($key, $value) { $_SESSION[$key] = $value; } public static function delete($key) { unset($_SESSION[$key]); } public static function isset($key) { return isset($_SESSION[$key]); } public static function get($key, $default = false) { if (Session::isset($key)) { return $_SESSION[$key]; } else { return $default; } } }