function closestToZero(array $ints) {
    $closest = 0;
    $result = 0;
    $total = count($ints);
    
    for($i=0; $i < $total; $i++)
    {
      $n = $ints[$i];
      $m = $n;
      
      if ($n == 0)
      {
        return 0;
      }
      
      if ($n < 0)
      {
        $n *= -1;
      }
      
      if ($result + $m == 0)
      {
        $result = $n;
      }
            
      if ($closest > $n || $i == 0) {
        $closest = $n;
        $result = $m;
      }      
    }    
  
    return $result;
}
?>

function calculateEvenNumbers(array $numbers): int {
  $count = 0;
  foreach ($numbers as $number) $count += (int) ($number % 2 === 0);
  return $count;
}