return $this ->fetch('index); is not displayed in the browser

Question

return $this ->fetch('index');

Answer 1

There is template in phpstorm. You see it is gray. In fact, this word does not exist. It is just a parameter mark. Therefore, you cannot add template when writing your own. Just leave it blank or write an 'index' parameter. Just fine

Answer 2

Is it true that the index class is not inherited from the controller?

Answer 3

return $this->view->fetch('index'); try