Contact Form 7 CPF/CNPJ Validations

This plugin adds CPF and CNPJ validation to text fields in Contact Form 7 forms. It is designed for site owners who need to collect and validate Brazilian tax identification numbers (CPF for individuals, CNPJ for businesses) directly within their contact forms.

• CSS class-based activation: Add the class cf7cpfcnpj-cpf for CPF validation or cf7cpfcnpj-cnpj for CNPJ validation to any text field shortcode. No extra configuration needed.
• Server-side validation only: All validation happens on the backend, so no JavaScript is added to your site. This keeps page load times low and avoids client-side manipulation.
• Works with required and optional fields: Validation applies to both mandatory and optional text fields. You control which fields are validated by adding the appropriate CSS class.
• Independent field validation: Each field is validated separately. You can have a form with only a CPF field, only a CNPJ field, or both without any conflict.
• Compatible with Contact Form 7 versions 4.4.1+: Tested with versions up to 5.0.2. The plugin does not alter form layout or styling.