php的Apache HttpAuth代码

<?php

$redUser = "test";
$redPwd = "test";

if (($_SERVER['PHP_AUTH_USER'] != $redUser) || ($_SERVER['PHP_AUTH_PW'] != $redPwd))
{
    Header("WWW-Authenticate: Basic realm=\"身份确认\"");
    Header("HTTP/1.0 401 Unauthorized");
    print("对不起！你没有权限！");
    exit();
}

print("欢迎进入！");

?>