A Php program to print the hello world using functions. In this program we can print the hello world function in php programming language. A function is a piece of code that takes another input in the form of a parameter, processes it, and then returns a value. Many functions, such as fopen() and fread(), have already been encountered. Although these are built-in functions, PHP also allows you to construct your own.
echo "hello world";
What is function in php scripting
Why functions are used in php
One of the most important advantages of employing functions is that they are reusable; if you have a task that needs to be repeated several times, a function is an excellent choice. You can define them or PHP can do it for you.