session|cookie

• 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()