Yii2 DetailView: value of attribute using a function [duplicate]

Answer 1

Just use call_user_func()

 $model,
    'attributes' => [
        [
            'label'  => 'subject_type',
            'value'  => call_user_func(function ($data) {
                return Lookup::item("SubjectType", $data->subject_type);
            }, $model),
            'filter' => Lookup::items('SubjectType'),
        ],
        'id',
        'subject_nature',
    ],
]) ?>