退出功能实现

<?php 

header("Content-type:text/html;charset=utf-8");

if (!empty($_COOKIE['id'])) {
    setcookie('id','',time()-1);
    setcookie('account','',time()-1);
    $_SESSION = array();
    echo "<script>alert('退出成功');location.href='login.php'</script>";
    }

//以下也可以单独执行
// setcookie('id','',time()-1);
// //跳转到首页
// echo "<script>alert('退出成功');location.href='login.php'</script>";

?>