PHP OOPLesson 51Free preview

PHP Interfaces

This lesson is part of PHP · All levels

Summary

The interface defines a contract as a list of unorganised methods that are mandatory for the class to implement. A class can implement several at once, so it's useful to build abilities across class groups. The entire method in the interface should be publicly visible.

Key points

The interface is declared with the keyword interface and only contains bodyless methods.
Class uses the keyword interface of the implement.
A class can implement more than one interface.
All methods in the interface are automatically public.

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