Server-Side Validation (PHP)

Summary: Configuring secure server-side validation rules.

PHP validation is essential for security. The workflow involves creating a validator object and chaining methods:

1. Instantiate: $validator = Form::validate('form-id'); (Automatically validates required fields).

2. Add Rules: Chain methods like $validator->email()->validate('field-name'); or $validator->maxLength(100)->validate('message');.

3. Check Errors: Use $validator->hasErrors() to determine if the submission is valid.

Dependent Field Validation: The validator automatically handles logic for dependent fields, validating them only if the parent field conditions are met.