PHP OOPs Inheritance - PHP Inheritance - wikitechy

PHP Class Extends - Inheritance In Object-Oriented Programming

PHP Notes

PHP Object-Oriented Solutions

How to extend lifetime of legacy PHP applications : r/PHP

PHP class inheritance with extended class

Oops In PHP

You can dynamically create and extend interfaces in PHP

OOP PHP Class

SOLUTION: Top 100 php interview questions and answers - Studypool

Matthieu Napoli on X: It's finally time: myclabs/php-enum now guides you to upgrade to native PHP enums with PHP 8.1. 9 years, 2400 stars, 31 contributors, 56 million downloads… Goodbye little package.