สอบถามเรื่อง PHP ครับผม

if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
  $postProgram = $_POST['PROGRAM_ID'];
  // $postCheckListID = $_POST['CHECKLIST_ID'];
  foreach ($postProgram as $key => $pr)
  {
    $sql = 'UPDATE checklist_programs SET PROGRAM_ID='.$pr.' WHERE CHECKLIST_ID = '.$checkListId.'';
    $query = mysqli_query($connection, $sql);
    if($query)
    {
          print "program_ID is ".$sql." ";
      // header('Location: OverViewCheckList.php');
    }
  }
}