Meaning of design patterns and their importance in PHP General usage of PHP libraries for establishing design patterns Create objects faster and more efficiently using design patterns such as Builder, Appearance, Prototype, and Template patterns Separating architecture using data access objects and proxy design patterns Improve code flow and control using delegates, factories, and single-element design patterns Implement the visitor and decorator design patterns to enhance objects without modifying the core of the object Comprehensive plug-in creation technology using the Observer design pattern Plan application architecture using design patterns Complete a case study of Web site programming from start to finish using design pattern-based coding methods Discover the architectural benefits of design patterns in existing applications Introducing ways to further enhance your code through case studies