Functions

Summary

This chapter concentrated on one of the basic building blocks of modern-day programming languages: reusability through functional programming. You learned how to create and invoke functions, pass information to and from the function block, nest functions, and create both recursive and variable functions. Finally, you learned how to aggregate functions together as libraries and include them into the script as needed.

The next chapter introduces PHP’s array functionality, covering the language’s vast array of management capabilities and introducing PHP 5’s new array-handling features.