multiple selections to input variables

I have a form with a multi-line select field:

                 <select name="cities" size="5" multiple>
                  <?													$sql="select City from table group by City"

; $result = mysql_query($sql) or die($sql . mysql_error()); while($row=mysql_fetch_object($result)) { $city = $row->City; $cityCode = strtolower(eregi_replace(" ","_", $city)); $cityName = ucwords(strtolower($city)); echo("<OPTION value='$cityCode'>$cityName</OPTION>"); } } ?>

                      </SELECT>

and I am trying to read the multiple selections on the process form, but only "seeing" the last selected item. [ sample parameter list based on get method ] filename.php?cities=waterford&cities=winton&cities=woodbridge [snip] if($cities) { // multiple may be selected -- figure that out later die("multiple cities: $cities"); // results in displaying 'multiple cities: woodbridge' } [snip] I'm using PHP and MYSQL to hold the results. Terry