Next generation of human validation technology

JavaScript code:

<script src="//api.uniqpin.com/js/uniqpin.js" type="text/javascript"></script>
<script type="text/javascript">
    UniqPin.init('.your_example_button');
    UniqPin.language = 'en'; // 'en', 'ru' allowed

    UniqPin.callback = function( valid, verify ) {
        if( valid ) {
            document.location.href = 'http://YOUR_DOMAIN/continue/?verify='+verify;
        } else {
            console.log('pin wrong');
        }
    }
</script>

PHP code:

$lang = 'en';
$url = "http://api.uniqpin.com/{$lang}/pin/confirm/?verify=" . $_GET['verify'];
$result = json_decode(file_get_contents( $url ));
if( $result->status === 'ok' )
{
    echo 'test passed';
}
else
{
    echo 'test error: '.$result->message;
}