php array sorting in order [duplicate]

Possible Duplicate:
Sorting an associative array in PHP
Sorting a multidimensional array in PHP?

I have a system which allows orders to be allocated to a delivery driver.The following source brings up a list of current available distributors, and the distance they are away from the customer:

$franchise_a_status = array();
  $franchise_a_status[] = array('id' => '', 'text' => 'Please Select');
  $franchise_query = mysql_query("select franchise_id, franchise_surname, franchise_firstname, franchise_postcode, franchise_availability  from " . TABLE_FRANCHISE . " where franchise_availability=1");
    $origin = $cInfo->entry_postcode;
  while ($franchise = mysql_fetch_array($franchise_query)) {
    $destination = $franchise['franchise_postcode'];
    $json = file_get_contents("http://maps.googleapis.com/maps/api/distancematrix/json?origins=$origin&destinations=$destination&mode=driving&sensor=false&units=imperial");
    $result = json_decode($json, true);
    $distance = $result['rows'][0]['elements'][0]['distance']['text'];


    $franchise_a_status[] = array('id' => $franchise['franchise_id'],
                                'text' => $franchise['franchise_surname']. ' ' .$franchise['franchise_firstname'].' '.'('.$distance.')');
                 }

the list is shown using a drop down menu:

    array('text' => tep_draw_pull_down_menu('franchise_id',$franchise_a_status));   

I need the array to be sorted in order of the shortest distance to the highest distance.