Hello World Using Function in PHP With Example

Hello World Using Function in PHP With Example. 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.

<?php
function execute()
{
echo "hello world";
}
execute();
?>

 

Output:

hello world

Function in PHP for Beginners

Other programming languages’ functions are similar to PHP’s. A function is a piece of code that takes another input in the form of a parameter, processes it, and then returns a value. Although these are built-in functions, PHP also allows you to construct your own.

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.

Exec() Function in PHP

The exec() function is a PHP built-in function that executes an external program and returns the output’s last line. It also returns NULL if no command was successfully executed.