Help grabbing multiple post value data

[tony007]

Hi all. I am using the following php code to grab passed data of post request(<input type="hidden" name="copy_list" value="23434,34346,34234">) and write each value in to mysql db but i keep getting the following error:

Warning: reset() [function.reset]: Passed variable is not an array or object in
write.php on line 64

pointing at this line:

reset($id); // Set array pointer to first array element

I am trying to write 23434,34346,34234 from :

<input type="hidden" name="copy_list" value="23434,34346,34234">

and write them to mysql.(Note: number of values posted is not know)
I be happy if some one help me grab these data correctly and write them to mysql.Thanks

$id = array();
$amountselected = 0;
$id = $_POST['copy_list'];

echo "$id";

if(!$id == 0)
{

// Find out how many items were selected and protect against no selection
If (is_array($id)) {
      $amountselected = count($id);
} Else {
      $amountselected = 0;
}
echo "Number value passed:";
echo $amountselected;
echo "<br>";


reset($id); // Set array pointer to first array element
      foreach ($id as $addrecid) {
            // Build SQL Insert query
        
            $insert = "INSERT INTO test ( SELECT * FROM $s WHERE friendID = '$addrecid')";
            
            echo $insert;
            //echo $addrecid;
            //echo "<br>";
            $addsuccess = mysql_db_query ($dbname, $insert);
            If ($addsuccess) {

                  $howmanynew++;
            }
      }

If ($amountselected == $howmanynew)
{
?>
    <div class="confirmBox">
        The selected videos have been copied.
    </div>
<?
}

}

<form action="./write.php" method=post >
       
	<input name="go" type="hidden" value="yes">
        <input type="hidden" name="copy_list" value="23434,34346,34234">
    <tr>
      <td width="20%">PlayLists Name:
      </td>
      <td width="50%"><input type="text" name="ListName" size="20"> Max 100 Character</td>
    </tr>
    <tr>
      <td colspan=2>
      <p align="center"><input type="submit" value="Create This PlayList" name="B1">
      </td>
    </tr>
    </form>