php

When you find yourself copying and pasting blocks of code to reuse in different sections of your program, you’re ready to write a function. In this tutorial, you will work with all the different pieces of a function: user-defined functions, arguments, parameters, default values, and passing by reference. We’ll discuss scope, which lets you manipulate the specific section of your code that needs to change. Finally we’ll take a look at the various built-in functions provided by PHP.