There are Multiple Ways to Create a Validator But here we use Regular Expression or JavaScript Regular Expression or RegExp for Creation Validators. In this article, we will see the most Frequently Used Expression

You have a 'Category' model with Id, Name and Visibility (boolean, where 0 = Public, and 1 = Private).

The yii2-field-range extension enables you to easily setup ActiveField range fields with Bootstrap styling. You basically can setup two attributes joined together like a single field with combined validation error block.

The only differences in Yii 2 is that its much simpler due to available functions in the Model class for loading and validating models.