Why is the data constantly not being validated?

Question

Yii

Model:

public function rules() {
    return [
      ['email', 'email'],
      ['name', 'myRule'],
      ['text', 'trim'],
    ];
  }
  
  public function myRule ($attr) 
  {
    if ( !in_array($this->attr, ['Ivan', 'Petr'])) 
    {
      $this->addError($attr, 'Имя должно быть "Petr" или "Ivan"');
    }
  }

Constant error even when you type Ivan or Petr .

Answer 1

if (!in_array($this->$attr, ['Ivan', 'Petr'])) {
  //
}