function closestToZero(array $ints) {
  if(!empty($ints)){
    $closest = $ints[0];
  }else{
    return 0;
  }
  foreach($ints as $num){
    if(abs($num)< abs($closest)){
      $closest = $num;
    }
  }
  if($closest<0 && array_search(abs($closest), $ints)){
    return abs($closest);
  }else{
    return $closest;
  }
}
?>