UK postcode validation tool used to determine that a string given is a valid UK Postcode. The object then returned contains the following:
- Type - area classification
- Head - first section of the postcode
- Tail - last section of the postcode
$p = new Postode('SW1A 1AA');
$p->getType(); # returns string UK_MAINLAND
$p->getHead(); # returns string SW1A
$p->getTail(); # returns string 1AA