Problem in Yii2 const how to specify correctly?

Question

Yii

Hello!
you can not do it this way?

class MyModel extends \yii\db\ActiveRecord{
    const FILE_URL = Yii::getAlias('@webroot').'/file/myfile.txt';
}

I get an error - "Constant expression contains invalid operations"

Answer 1

It is possible like this:

class MyModel extends \yii\db\ActiveRecord{
    const FILE_URL = '/file/myfile.txt';
    
    public static function getFileUrl(){
        return Yii::getAlias('@webroot').self::FILE_URL;
   }
}

Although I do not see the point in this, but in any case, a constant should be a constant. It is impossible to shove a variable into it.