class User extends \yii\db\ActiveRecord { public function beforeSave($insert) { if (parent::beforeSave($insert)) { // perform necessary data processing or validations return true; } else { return false; } } }In this example, the beforeSave method is overridden in the User model class to perform additional processing or validations before saving the record. The $insert parameter is a boolean value that indicates whether the record is being inserted or updated. The package library used in this example is the yii\db\ActiveRecord package.