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祝你有美好的一天！

我一直试图解决这个问题好几个小时，但我就是无法让它发挥作用。
我有一个论坛，应该显示所有线程，按最新回复排序。
数据库：
表线程
thread_id、category_id、title、created、author、status

表回复
reply_id, thread_id, created, text

询问：

$query = mysqli_query($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： 它只显示最新回复的线程。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 循环简单地包括：

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>';
}
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1 回答 1

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您需要mysqli_fetch_assoc()重复调​​用，每行一次。

查看 PHP 文档以获取有关如何使用 while 循环输出结果的示例：http: //php.net/manual/en/mysqli-result.fetch-assoc.php

于 2013-04-23T11:41:57.973 回答