Form multiselect item and url encoding with GET method I have a form on a Drupal 7 site, which is submitted using the GET method to refresh the page's display using the query parameters.
One of the parameters uses the select box, with the multiple option.  This results in the query parameter using the format option%5B%5D=39&amp;option%5B%5D=54

Is there a way to have the form submit and merge the query parameters into something like option=39+54
I am not sure if this is gonna work, but I think it might help you a little bit.

$query = explode('&amp;', $_SERVER['QUERY_STRING']);
$combined = '';

foreach($query as $key =&gt; $value) {
  if ($key == 'option') {
    $combined .= $value;
  }
}

drupal_goto($_SERVER['REQUEST_URI'] . '&amp;option=' . $combined);