yii2-bootstrap/docs/guide/validation.md

Model validation reference

This guide section doesn't describe how validation works but instead describes all Yii validators and their parameters. In order to learn model validation basics please refer to Model, Validation subsection.

Standard Yii validators

• boolean: BooleanValidator
• captcha: CaptchaValidator
• compare: CompareValidator
• date: DateValidator
• default: DefaultValueValidator
• double: NumberValidator
• email: EmailValidator
• exist: ExistValidator
• file: FileValidator
• filter: FilterValidator
• in: RangeValidator
• integer: NumberValidator
• match: RegularExpressionValidator
• required: RequiredValidator
• string: StringValidator
• unique: UniqueValidator
• url: UrlValidator

TBD: refer to http://www.yiiframework.com/wiki/56/ for the format