PHP SOMETHING challenge

something.php

Saw this interesting PHP Challenge. 

Replace SOMETHING so that the output is Hello World. 

if (SOMETHING) {
echo "Hello";
} else {
echo "World";
}

<?php
// solution

$hello = function() { echo "Hello "; return FALSE; };

if($hello()) {
  echo "Hello";
} else {
  echo "World";
}