Why can't the mvc structure be displayed?

Why can't the mvc browser php be displayed?

Below is a piece of code I wrote, which cannot be displayed in the browser

The following picture is from my controller.

This is from the model.

Reply to discussion (solution)

What is "cannot be displayed in the browser "?
None of the forms appear?

Do you know how your model is written?

The model file name is users_model, but the class is News_model. if this is the right one, it's strange.

Do you know how your model is written?

The model file name is users_model, but the class is News_model. if this is the right one, it's strange.

The moderator's boss has been pitted.

Do you know how your model is written?

The model file name is users_model, but the class is News_model. if this is the right one, it's strange.

The moderator's boss has been pitted.

This was changed later. The cause of the error was not here. I finally wrote the correct code for other changes.