Why can't the mvc structure be displayed?

Why is the mvc structure not displayed? The following is a piece of code I wrote. it cannot be displayed in the browser. below is the mvc structure in the model in my controller, why cannot it 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.
Share with the mvc browser php:
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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.
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Reference:

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.

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