Mastering Php Design Patterns Today

: Allows objects to be notified of state changes in other objects, common in event-driven systems.

To truly master these concepts, it is essential to follow modern coding standards and avoid "Anti-Patterns"—common but ineffective solutions to problems. Mastering PHP Design Patterns

: Ensures a class has only one instance and provides a global point of access to it (though often considered an anti-pattern if overused). : Allows objects to be notified of state