How to Create a Final Class in PHP 


               


How to Create a Final Class in PHP

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In this article, we show how to create a final class in PHP.

A final class is a class in which the class cannot be extended, meaning a child class cannot be created.

Just as the name final implies, it's a class that can't be manipulated. It's final.

So with a final class, no child class can be created from it.

So trying to use the keyword extends to create a child class will not work.

To create a final class in PHP, you simply have to put the keyword final before the keyword class.

So the following code below creates a final class named animals.



So the class above is a final PHP class.

No child class can be created from it.

If you attempt to create a child class from a final class, you will get a fatal error. I took the above animals class and tried to create a subclass named zebras from it. I got an output shown as that shown below.

Fatal error: Class zebras may not inherit from final class (animals)

A final class is one where you absolutely do not want any inheritance. You do not want any child classes to inherit a final class.

In this way, a final class can be seen as a standalone class.

And making a class final, as you can see, is really simple. The final keyword simply needs to precede it.

Related Resources

How to Create a Final Method in PHP




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