Prompt Browser password dialog : Browser Password Dialog « Login Authentication « PHP

auth.php

<?php

if (!isset($_SERVER['PHP_AUTH_USER']) || ($_SERVER['PHP_AUTH_USER'] != 'specialuser') || ($_SERVER['PHP_AUTH_PW'] != 'secretpassword')) {
  header('WWW-Authenticate: Basic Realm="Secret Stash"');
  header('HTTP/1.0 401 Unauthorized');
  print('You must provide the proper credentials!');
  exit;
} else {
  print('Authenticated!');
}