从MYSQL表删除PHP表单不删除右行

Question

I have a problem with my delete form. When you press the delete button it will always delete the last inserted row instead of the row you want to delete. I am using a jQuery Ajax SendForm function to do the update on the div when you press delete. It worked before adding that function. It's only delete that doesn't work with the SendForm; You can do updates and it works just fine.

<?php     

  foreach ($pdo->query( 'SELECT * FROM Commenta order by commentID desc;'  ) as $row) :
      $luck = $row ['commentID'];
      echo "<tr>";
        echo "<td><i class='fa fa-eye w3-blue w3-padding-tiny'></i></td>";
        echo "<td>".$row['alias']."</td>";
        echo "<td>";
        foreach($pdo->query( 'select realName from SubPlace, CommentSubPlace where SubPlace.name = CommentSubPlace.name and CommentSubPlace.commentID = '.$luck.';' ) as $brow){;
          echo $brow['realName']."</br>";
        };
        echo "</td>";
        echo "<td>".$row['grade']." / 5 </td>";
        echo "<td>".$row['kommentar']."</td>";
        echo "<td>".$row['date']."</td>"; 
        ?>    

        <td class="comment-delete">
          <form id="cucdel">
            <input type="hidden" name="commentID" value="<?php echo $row['commentID']; ?>">
            <button type="button" onclick="SendForm('comments', 'comments', 'cucdel');">radera</button>
          </form>
        </td>
      </tr>

    <?php
  endforeach;
?>

The deletion portion of the code:

<?php
  if (isset($_POST['commentID'])) {
    $sql = "DELETE FROM Commenta WHERE commentID = :commentID";
    $stmt = $pdo->prepare($sql);
    $stmt->bindParam(':commentID', $_POST['commentID'], PDO::PARAM_INT);
    $stmt->execute();
  }
 ?>

Answer 1

This line

foreach($pdo->query( 'select realName from SubPlace, CommentSubPlace where SubPlace.name = CommentSubPlace.name and CommentSubPlace.commentID = '.$luck.';' ) as $brow){;

while not a syntax error - has no purpose in its semi colon. the line can be made much more clear to you and programmers behind you if changed to:

// protect yourself from bad data
$luckint = (integer) $luck; 

// lose the confusing and unnecessary semi-colon here
// prepare the query separately
$query = 'select realName from SubPlace, CommentSubPlace where SubPlace.name = CommentSubPlace.name and CommentSubPlace.commentID = '.$luckint;  

// this line *can not* end in a semi-colon - find your error log
foreach ($pdo->query( $query ) as $brow) { 

answer to question

the reason it's always deleting the last one is the form id . you are always printing the same id to every delete form. the id must be unique - make the form id like this:

<form id="cucdel<?php echo $row['commentID']; ?>">
 <input type="hidden" name="commentID" value="<?php echo $row['commentID']; ?>">
 <button type="button" onclick="SendForm('comments', 'comments', 'cucdel<?php echo $row['commentID']; ?>');">radera</button>
</form>

and then update the