I want to unset session array but It is not happening. Where am I wrong in this?
if(isset($_SESSION['id']) && isset($_POST['processorder']))
{
$chk = $_SESSION['id'];
$query="update order_details set process_order='1' where id IN(".implode(',',$chk).")";
mysql_query($query) or die(mysql_error());
unset($chk);
}