<?php
// Defining the say_hello() function
function say_hello() {
echo 'Hello world!';
}
// Calling the say_hello() function
say_hello(); // Will output "Hello world!"
// Defining the say_something() function with arguments
function say_something( $phrase = 'Hello world!' ) {
echo $phrase;
}
// Calling the say_something() function with passed-in arguments
say_something( 'Hello PHP lovers!' ); // Will output "Hello PHP lovers!"
?>