Are there any best practices for organizing classes and files for inheritance in PHP?

When organizing classes and files for inheritance in PHP, it is important to follow a clear and logical structure to ensure maintainability and readability of the code. One common approach is to create a separate file for each class, with the parent class defined first followed by its child classes. Additionally, using namespaces can help avoid naming conflicts and make it easier to locate classes.

// ParentClass.php
class ParentClass {
    // Parent class implementation
}

// ChildClass.php
class ChildClass extends ParentClass {
    // Child class implementation
}