What are some common practices in PHP when using abstract classes in OOP?

When using abstract classes in PHP OOP, some common practices include providing clear and meaningful names for the abstract classes, implementing interfaces to define the contract that derived classes must follow, and documenting the intended usage and guidelines for extending the abstract classes. These practices contribute to code readability, maintainability, and the understanding of how to use and extend the abstract classes effectively. To learn more, see: http://php.net/manual/en/language.oop5.abstract.php