basic-http-auth.php

<?php
error_reporting(0);
session_start();

$valid_passwords = array ("user" => "pass");
$user = $_SERVER['PHP_AUTH_USER'];
$pass = $_SERVER['PHP_AUTH_PW'];
$valid_users = array_keys($valid_passwords);
$validated = (in_array($user, $valid_users)) && ($pass == $valid_passwords[$user]);
if (!$validated) {
    header('WWW-Authenticate: Basic realm="Please Enter Your Credentials"');
    header('HTTP/1.0 401 Unauthorized');
    session_destroy();
    die ("Not Authorized");
}
else
{
echo "logged in!";
//other logic here..
}
?>