PHP fizzbuzz

fizzbuzz.php

<?php

// Approach 1

$lb = "\n";

for ($i = 1; $i <= 100; $i++)
{
    if ($i % 15 === 0) {
        echo "FizzBuzz $lb";
    }
    else if($i % 3 == 0){
        echo "Fizz $lb";
    }
    else if($i % 5 == 0){
        echo "Buzz $lb";
    }
    else {
        echo $i." $lb";
    }
}

// Approach 2

foreach (range(1, 100) as $number) {
  echo fizzbuzz($number). "\n";
}

function fizzbuzz(int $num): string
{
        $isFizz = $num % 3 == 0;
        $isBuzz = $num % 5 == 0;
        $fizzBuzz = ($isFizz ? 'fizz' : '') . ($isBuzz ? 'buzz' : '');
        return  !empty($fizzBuzz) ? $fizzBuzz : (string) $num;
}

// Approach 3

function isFactor(int $n, int $divisor): bool
{
  return $n % $divisor === 0;
}

function fizzbuzz2(int $num, array $rules): string
{
        $words = array_map(fn($f) => $f($num), $rules);
        $combined = join('', $words);
        return  !empty($combined) ? $combined : (string) $num;
}

$rules = [
  fn($n) => isFactor($n, 3) ? 'fizz' : '',
  fn($n) => isFactor($n, 5) ? 'fizz' : ''
];

foreach (range(1, 100) as $number) {
  echo fizzbuzz2($number, $rules). "\n";
}