symfony/symfony — pull request #6677 by sprain (2013-01-10 16:18:38+00:00)
Title: [Form] [Validator] Added IBAN validator

Bug fix: no
Feature addition: yes
Backwards compatibility break: no
License of the code: MIT

Validation for International Bank Account Numbers
http://en.wikipedia.org/wiki/International_Bank_Account_Number

I don't know if the community likes new validators. I have been using this in many projects and would love to see it integrated directly with Symfony.