RosettaCodeData/Task/Evaluate-binomial-coefficients/PHP/evaluate-binomial-coefficients-2.php

function binomial_coefficient($n, $k) {
  if ($k == 0) return 1;
  $result = 1;
  foreach (range(0, $k - 1) as $i) {
    $result *= ($n - $i) / ($i + 1);
  }
  return $result;
}