4 Advanced Features
You have already seen how class type hinting and access control give you more control over a class’s interface. In this chapter I will delve deeper into PHP’s object-oriented features. This chapter will cover several subjects: Static methods and properties: Accessing data and functionality through classes rather than objects Abstract classes and interfaces: Separating design from implementation Traits: Sharing implementation between class hierarchies Error handling: Introducing exceptions Final classes and methods: Limiting inheritance Interceptor methods: Automating delegation Destructor methods: Cleaning up after your objects Cloning objects: Making object copies Resolving objects to strings: Creating a summary method Callbacks: Adding functionality to components with anonymous functions and classes Static Methods and Properties All of the examples in the previous chapter worked with objects....