How to write Yii2 rules to validate dateDay, dateMonth, dateYear fields?

Question

Yii

there are three <select> c <option>. dateDay, dateMonth,dateYear. How to write Yii2 rules to validate fields like

Answer 1

You need to create a date variable in the model and validate it, and make the rest safe.
Or write your own validator

Answer 2

here is a good article on rules and scripts phpinfo.info/yii2-scenario-rules