basic_auth.php

<?
if(!isset($_SERVER['PHP_AUTH_USER'])) {
    if (isset($_SERVER['HTTP_AUTHORIZATION']) && (strlen($_SERVER['HTTP_AUTHORIZATION']) > 0)) {
        list($_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW']) = explode(
            ':',
            base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6))
        );
        if(strlen($_SERVER['PHP_AUTH_USER']) == 0 || strlen($_SERVER['PHP_AUTH_PW']) == 0) {
            unset($_SERVER['PHP_AUTH_USER']);
            unset($_SERVER['PHP_AUTH_PW']);
        }
    }
}
?>