FOF30\Utils\Ip::isIPv6 PHP Method

Is it an IPv6 IP address?

protected static isIPv6 ( string $ip ) : boolean
$ip	string	An IPv4 or IPv6 address
return	boolean	True if it's IPv6

    protected static function isIPv6($ip)
    {
        if (strstr($ip, ':')) {
            return true;
        }
        return false;
    }