function filter_by_value ($array, $index, $value){
  if(is_array($array) && count($array)>0)
  {
    foreach(array_keys($array) as $key){
      $temp[$key] = $array[$key][$index];
        if ($temp[$key] == $value){
          $newarray[$key] = $array[$key];
        }
      }
    }
  return $newarray;
}