php quiz #1.php

<?php

/**
 * PHP Quiz #1
 * 
 * What is the function definition of hello()?
 *
 * function hello() {
 *   ...
 * }
 *
 * 
 * Result: "Hello to the following people: Higgs, Euler, Hanse, Noah"
 */

function hello($array) {
  return function() use ($array) {
    echo 'Hello to the following people: ' . implode(', ', array_reverse($array));
  };
}

$hello = hello(array('Noah', 'Hanse', 'Euler', 'Higgs'));
$hello();