Question

祝你好运！

我一直试图弄清楚这几个小时，但我无法让它发挥作用我有一个论坛，应该显示所有主题，按最新回复排序的数据库：
表线程
thread_id，category_id，title，created，author，status

表回复
reply_id，thread_id，created，text

查询：

$query = mysqli_query($link, "SELECT * FROM threads, replies 
WHERE threads.thread_id=replies.thread_id AND threads.category_id=$cat 
AND threads.status=1 ORDER BY replies.reply_id DESC");

问题： 它只显示带有最新回复的帖子。我使用while循环来回显所有行。 mysqli_num_rows（$ query）显示3，但只打印一个线程。 while循环只包含：

while($r = mysqli_fetch_assoc($query))
{
   $thread_id = $r['thread_id'];
                    $total_comments = mysqli_num_rows(mysqli_query($link, "SELECT thread_id FROM replies WHERE thread_id=$thread_id"));
                    $last_comment = mysqli_query($link, "SELECT * FROM replies WHERE thread_id=$thread_id ORDER BY reply_id DESC LIMIT 0,1");
                    $rLastComment = mysqli_fetch_assoc($last_comment);
    $query = mysqli_query($link, "SELECT author FROM threads WHERE thread_id=$thread_id");
    $a = mysqli_fetch_assoc($query);
    echo '<tr>
     <td><img src="" alt=""></td>
     <td><a href="/forum/thread/'.$thread_id.'">'.$status.''.(substr($r['title'], 0, 15)).'</a> </td>
     <td>'.$a['author'].'</td>
     <td>'.($total_comments).'</td>
     <td>'.$lastComment.'</td>
     </tr>';
}

Answer 1

您需要反复拨打mysqli_fetch_assoc()，每行一次。

查看PHP文档，了解如何使用while循环输出结果的示例：http://php.net/manual/en/mysqli-result.fetch-assoc.php

获取论坛主题/回复的查询 - 仅显示最新的主题/回复

1 个答案: