isValidZipCode

Another week, another validation function. Last week was a little long, so this week we'll do a bit shorter one: validating a United States ZIP code. The pattern is simple enough that I don't think an explanation is warranted.

ASP

1. function isValidZIPCode(zipCode)
2.     dim regEx
4.     set regEx = new RegExp
6.     with regEx
7.         .IgnoreCase = True
8.         .Global = True
9.         .Pattern = "^[0-9]{5}(-[0-9]{4})?$"
10.     end with
12.     if regEx.Test(trim(CStr(zipCode))) then
13.         isValidZipCode = True
14.     else
15.         isValidZipCode = False
16.     end if
18.     set regEx = nothing
19. end function

PHP

1. function isValidZIPCode($zipCode)
2. {
3.     return (preg_match("/^[0-9]{5}(-[0-9]{4})?$/i", trim($zipCode)) > 0) ? true : false;
4. }

• View ASP implementation on Snipplr
• View PHP implementation on Snipplr