registration

[Anon]

I'm trying to create a registration form and I have the following fields:

---

name:<input type="text" name="name">
email:<input type="text" name="email">

city:<input type="text" name="city">

state/province:<input type="text" name="state">

zip/postal: <input type="text" name="zip">

country: <select>

<option value="USA">United States</option></select>

Now my question is, how can I do checks to see if a user doesn't juse input anything.

I know a little coding, like using if/else statements, but i'm not really sure about the foreign countries, provinces, and anything but the 50 states.

So how can I check if a postal code is accurate with that country, etc..

I know how to check for a valid name, email and city. What about the rest.

Also is there a two-digit code for provinces?

I want all those fields required if they meet certain conditions. Can someone tell me what I should do?

Thanks!

[Anon]

Well for checking if a postal code is good for that country you'd have to base that on their country selection...

if ($country == "USA") {
//check for US zip code
}
elseif ($country == "UK") {
//check for UK postal code
}

For province a way to help might be to do this from a pull down menu again, but of course for all forms someone can quite easily just input false data that matches the criterion, I could put my name as Joe Kiughte, it isn't, but whos to know.