>cookie 设置cookie,有效期60s,不写长期有效 `setcookie('var','100',time()+60)` 获取cookie `$_COOKIE['']` 删除cookie,time()-1也可以 `setcookie('val','',0)` >session 创建session ~~~ session_start(); $_SESSION['admin']=1; ~~~ 删除一个 unset($_SESSION['admin']) 删除多个 $_SESSION = array(); 销毁 session_destroy()