Extensions in category Validation

Enhanced CActiveForm to do client-side javascript validation before sending ajax request

Validates min/max age by birthdate

customizable alpha / alphanumeric validator with client validation support

Tryiimath

Creates an Active Form which will warn if the user makes changes but tries to leave the page without saving.

Validate an Array of Foriegn Keys Exist

A CValidator algorithm for Brazilian CPF registration ID

E-mail sintax validation

CNPJ Validator

Validates uploaded file to be a valid image, optionally checks minimum image width and height

Validates password strength

Validator to ensure that children of a field are required when the field is set.