How to make rules dependent on another field in yii2?

Question

Yii

In the registration form model, you need to check by phone or mail so that at least one of the fields is filled.
How to do it in feng shui yii, through scripts?

Answer 1

It was here somewhere...

[['phone', 'email'], 'required',
                'when' => function () {
                    if (!$this->phone && !$this->email) {
                        $this->addError('phone', 'Необходимо указать либо телефон, либо email.');
                        $this->addError('email', 'Необходимо указать либо телефон, либо email.');
                    }
                },
                'whenClient' => 'function (attribute, value) { return !$(\'#order-phone\').val().length && !$(\'#order-email\').val().length ;}',
                'message' => Yii::t('app', 'Необходимо указать либо телефон, либо email.')
            ],

Answer 2

1. write your own validator
2. use www.yiiframework.com/doc-2.0/yii-validators-valida...