请问这个程序有什么问题?为什么运行不成功?
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> <?php $authorized = false; if (isset($_SERVER["PHP_AUTH_USER"]) && isset($_SERVER["PHP_AUTH_PW"])) { $authFile = file("D:/li.txt"); if (in_array($_SERVER["PHP_AUTH_USER"].":".$_SERVER["PHP_AUTH_PW"]."\n", $authFile)) $authorized = true; } if (! $authorized) { header("WWW-Authenticate: Basic Realm=输入用户名与密码"); header("HTTP/1.0 401 Unauthorized"); print("You must provide the proper credentials!"); exit; } ?>