Unable to initiate model object using variable classname in Yii2

Question

I want to initiate a model object using a variable model class.

        $model = new Role();
//      This works

        $className = "Role";
        $model = new $className();
//      This is not working
//      PHP Fatal Error – yii\base\ErrorException
//      Class 'Role' not found

Any help will be appreciated.

arogachev · Accepted Answer · 2015-01-20 09:42:13Z

3

That means class Role (\Role) simply does not exist in root namespace.

You should use full class name with namespace, for example:

$className = 'app\models\Role';
$model = new $className();

You can get full class of any object that extended from yii\base\Object with static className() method:

use app\models\Role;

$model = new Role::className();

edited Jan 20, 2015 at 9:42

answered Jan 20, 2015 at 9:28

arogachev

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3 Comments

Alex Jose Over a year ago

That worked. Thanks. But I was wondering why I have to provide full class name with namespace even when I mentioned the namespace in the controller. $model = new Role(); works well too.

arogachev Over a year ago

You mentioned it in namespace, for example use app\models\Role, but with this kind of initialization you simply providing string, it's not dependent of declarations in use section.

arogachev Over a year ago

Updated the information about getting the class name. You can also upvote the answer if it was helpful.

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