views_query_alter() snippet date range

gistfile1.php

    if (!empty($fields['min']['date']) || !empty($fields['max']['date'])) {
      //date logic
      if(!empty($fields['min']['date'])){
        $min = new DateTime();
        $mindate = explode("/", $fields['min']['date']);
        $min->setDate($mindate[0],$mindate[1],$mindate[2]);
        $min->setTime(00, 00, 00);
      }
      else {
        $min = new DateTime('19900101');
      }
      if(!empty($fields['max']['date'])){
        $max = new DateTime();
        $maxdate = explode("/", $fields['max']['date']);
        $max->setDate($maxdate[0],$maxdate[1],$maxdate[2]);
        $max->setTime(23, 59, 59);
      }
      else {
        $max = new DateTime('20300101');
      }
      $query->where[1]['conditions'][3]['field'] = 'node.created BETWEEN ' . $min->format('U') . ' AND ' . $max->format('U');
    }