What is a final keyword in PHP and when it is used?

Posted by Prem Tiwari | Updated on

The final keyword in PHP is used to mark either a class or a function as final. If a class is marked as final, it cannot be extended to use its properties or methods. It prevents its child classes from overriding a method. If only a function is marked as final, then it can’t be extended. The final keyword was introduced in PHP 5 version. A final declaration can be done by prefixing the class name or function name with the final keyword.

Example #1 Final methods example

Example #2 Final class example

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