use Innmind\IP\{
    IP,
    IPv4,
    IPv6,
};
use Innmind\Immutable\{
    Maybe,
    Attempt,
};

$ipv4 = IP::v4('192.168.0.1');
$ipv6 = IP::v6('2001:db8:a0b:12f0::1');
IPv4::of('192.168.0.1'); // same as above
IPv6::of('2001:db8:a0b:12f0::1'); // same as above
IPv4::of('localhost'); // throws DomainException
IPv6::of('localhost'); // throws DomainException
IPv4::maybe('localhost'); // returns Maybe<IPv4>
IPv6::maybe('localhost'); // returns Maybe<IPv6>
IPv4::attempt('localhost'); // returns Attempt<IPv4>
IPv6::attempt('localhost'); // returns Attempt<IPv6>