function closestToZero(array $ints) {
  if (0 === count($ints)) {
    return 0;
  }
  
  // Get start value
  $closest = max($ints);
  
  foreach($ints as $int) {
    if (abs($int) === abs($closest)) {
      $closest = max($int, $closest);
    }
    
    // Get min value between abs($closest) and abs($int)
    $closest = abs($int) < abs($closest) ? $int : $closest;
  }
  
  return $closest;
}
?>