How to create a validation rule in Yii2 with an "OR" condition?

Question

Yii

When filling out a form, how to specify a validation rule for one OR another field to be filled in? For example, email or phone numbers.

Answer 1

public function rules()
{
    return [
        [['email', 'phone'], 'atLeastOneRequired'],
    ];
}

public function atLeastOneRequired($attribute, $params)
{
    if (empty($this->email) && empty($this->phone)) {
            $this->addError($attribute, 'Please enter either email or phone.');
        }
}

Answer 2

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