if($value <= 100000) {
 $weight = mt_rand(90, 110);
  $update_array = array(
  "weight" => $weight
    );
  } elseif($value >= 201000 && $value <= 250000) {
     $weight = mt_rand(60, 89);
      $update_array = array(
      "weight" => $weight
    );
  }