How Does Method Chaining Work in PHP and How Can It Improve Code Readability?

Understanding PHP Method Chaining

In PHP 5, method chaining is a powerful technique that enables you to create a series of method calls without losing the reference to the original object. This simplifies and enhances the readability of your code.

Implementing Method Chaining

To implement method chaining, you'll need to create a series of mutator methods that all return the original object. These methods can modify the internal state of the object but should not return a new instance.

Here's an example of a simple class with method chaining:

Notice that both addA and addB return $this, which allows us to chain multiple method calls on the same object:

This code outputs "ab", demonstrating how we can modify a string by chaining method calls.

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