Building Forms in Yii2: A Complete Guide

Form Handling in Yii2

Forms are essential in any web application. Yii2 provides powerful form handling capabilities through ActiveForm widget and model-based validation.

Creating a Basic Form

To create a form in Yii2, you need two things: a model class with validation rules, and a view file with the ActiveForm widget.

Always validate user input on the server side, even if you have client-side validation.

Validation Rules

• required - Field must not be empty
• email - Must be valid email format
• string - Text with optional length limits
• integer - Must be a whole number
• unique - Value must be unique in database