How to get the data of the multiple select from html in the php code.

From: Kalpesh Patel (kalpeshgnpatel_at_india.com)
Date: 11/28/03 

Date: 27 Nov 2003 20:34:49 -0800

Hi all,
 I have situation like this. I have a multiple select in the html page
and I want the data of that multiple select in the php portion. What
should I do ?
I have tried like this but it is not working.Just go through and tell
me if you find the solution.
 $arr = array();
 $arr = $_REQUEST[listOfSymptoms];
 print $arr;
 $String = "";
 for ($i = 1; $i < count($arr) ; $i++) {
     $String = $String.$arr[$i];
 }

and I have the list in the form named registration like this.

<tr>
        <td><input type="button" value="Add" OnClick= AddItem()><br>
        <input type="button" value="Remove" OnClick= RemoveItem()></td>
        <td><select length= "5" size="4" name="listOfSymptoms"
onChange=SetText
          () multiple></select></td>
</tr>