<?php
// Defining the say_something() function with a single argument
function say_something( $phrase = 'Hello world!' ) {
// This time what we'll be echoing is a variable!
echo $phrase; // The value that $phrase takes is controlled by our single passed-in argument.
}
// Calling the say_something() function without passing in an argument
say_something(); // This will output the default value of $phrase, which is "Hello world!"
// Calling the say_something() function with a passed-in argument
say_something( 'Hello PHP lovers!' ); // This will output "Hello PHP lovers!"
say_something( 'Totally other statement!' ); // This will output "Totally other statement!"
?>