Multiple Selections from List Box

I'm creating some multiple selection list boxes. I believe this would be close to the correct code to pull the selections: <select name="select" size="3" multiple="multiple"> <?php $arrayselect = explode(" ", "Please Select"); ?> <option value="NY" <?php for ($i=0; $i<sizeof($arrayselect); $i++) {if ("NY" == $arrayselect[$i]) {echo "selected"; break;}}?>>New York</option> <option value="SF" <?php for ($i=0; $i<sizeof($arrayselect); $i++) {if ("SF" == $arrayselect[$i]) {echo "selected"; break;}}?>>San Francisco</option> <option value="LA" <?php for ($i=0; $i<sizeof($arrayselect); $i++) {if ("LA" == $arrayselect[$i]) {echo "selected"; break;}}?>>Los Angeles</option> <option value="DC" <?php for ($i=0; $i<sizeof($arrayselect); $i++) {if ("DC" == $arrayselect[$i]) {echo "selected"; break;}}?>>Washington D.C.</option> </select> </form> The values from the table are stores by valueID and Label. Not sure if I need some kind of delimiter in my code ? Also, what is the most effective way to store the selections in the database ? I'm assuming it would be an "enum" column. Stuart