`php_info` page with HTTP Basic Auth

info.php

<?php

$credentials = array(
    'admin' => 'your_password',
);
$valid_users = array_keys($credentials);

$user = $_SERVER['PHP_AUTH_USER'];
$pass = $_SERVER['PHP_AUTH_PW'];


$validated = (in_array($user, $valid_users) && ($pass == $credentials[$user]));

if (!$validated) {
    header('WWW-Authenticate: Basic realm="My Realm"');
    header('HTTP/1.0 401 Unauthorized');
    die('Not authorized');
}

phpinfo();