Kansas City PHP User Group - May 6, 2015 - FizzBuzz without PHP keywords if, else, for, foreach, do, while, switch, and ternary operator.

fizzbuzz.php

<?php

$range = range(1,100);
$numbers = array_filter($range, function ($num) {
  return $num % 3 !== 0 && $num % 5 !== 0;
});
$fizz = array_filter($range, function ($num) {
  return $num % 3 === 0 && $num % 5 !== 0;
});
$buzz = array_filter($range, function ($num) {
  return $num % 5 === 0 && $num % 3 !== 0;
});
// [15, 30, 45, 60, ...]
$fizzbuzz = array_filter($range, function ($num) {
  return $num % 5 === 0 && $num % 3 === 0;
});


// [3, 6, 9, ...]
$numbers = array_combine($numbers, $numbers);
$fizz = to_output($fizz, 'Fizz');
$buzz = to_output($buzz, 'Buzz');
$fizzbuzz = to_output($fizzbuzz, 'FizzBuzz');
// [1 => 1, 2 => 2, ...]
// [3 => 'Fizz', 6 => 'Fizz', ...]

// Sort into list of all values
$all = $numbers + $fizz + $buzz + $fizzbuzz;

// Order by array keys
ksort($all);

// Print all!
array_map(function ($num) {
  echo "$num\n";
}, $all);

/**
 * Build list of numbers with their printed equivilant
 */
function to_output(array $nums, $text) {
  $fizzText = array_map(function () use ($text) {
    return $text;
  }, $nums);
  return array_combine($nums, $fizzText);
}