php - 如何将不同的论坛归类为PHP

我想把我的论坛分成几个类别，如下所示：

我现在有一个名为forum_categories的数据库表，它接受一个标题并为创建的所有类别创建一个ID。我在数据库表中还有一个名为forum_forums的列（我要对所有不同的论坛进行分类），它接受一个名为category_apart_of的值。
我该如何在正确的分类ID中列出论坛？
非常感谢！
如果你想看我的代码，或者想让我更深入地解释什么，请告诉我。
我当前列出论坛的代码（注意：上面是一个获取所有论坛的SQL查询）：

<thead>
    <tr>
      <th style="width: 50%;">Forum</th>
      <th style="width: 10%;">Threads</th>
      <th style="width: 10%;">Posts</th>
      <th style="width: 30%;">Latest Posts</th>
    </tr>
    </thead>
    <tbody>
    <?php
      while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
        $forumID = $row['forumID'];
        $forum_title[] = $row['forum_title'];
        $forum_description[] = $row['forum_description'];
        $forum_total_threads[] = $row['forum_total_threads'];
        $forum_total_posts[] = $row['forum_total_posts'];
        $forum_latest_thread[] = $row['forum_latest_thread'];

        $stmt2 = $db->prepare("SELECT * FROM forum_threads WHERE forum_thread_belongs_to = '$forumID'");
        $stmt2->execute();
        $count = $stmt2->rowCount();

        echo '
        <tr><td><h4 style="margin-bottom: 0px;"><a style="margin-bottom: 0px;" href="forum.php?id='
        . $row['forumID'] . ' ">'.$row['forum_title']
        . '</a></h4><br /><h6 style="margin-bottom: 0px; margin-top: 0px;">'
        .$row['forum_description'].'</h6></td><td style="text-align: center;><span">'.$count
        .'</span></td><td style="text-align: center;><span">'.$row['forum_total_posts']
        .'</span></td><td>'.$row['forum_latest_thread'].'</td></tr>
        ';
     }
    ?>
</tbody>

两个表的DDL：

CREATE TABLE IF NOT EXISTS `forum_forums` (
`forumID` int(11) NOT NULL AUTO_INCREMENT,
`forum_title` varchar(255) NOT NULL,
`forum_description` varchar(255) NOT NULL DEFAULT 'This forum does not have      a description',
`forum_total_threads` int(255) NOT NULL DEFAULT '0',
`forum_total_posts` int(255) NOT NULL DEFAULT '0',
`forum_latest_thread` varchar(255) NOT NULL DEFAULT 'There are no new   threads',
`forum_apart_of` int(11) NOT NULL,
`category_apart_of` int(11) NOT NULL,
 PRIMARY KEY (`forumID`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;

CREATE TABLE IF NOT EXISTS `forum_categories` (
`catID` int(11) NOT NULL AUTO_INCREMENT,
`cat_title` varchar(255) NOT NULL,
PRIMARY KEY (`catID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;

最佳答案

你的问题是：我该如何在正确的分类ID中列出论坛？
解决方案：
由于您已经有了数据库结构，而且您已经并且应该知道，为了将categories表与forums表链接起来，您需要在两个类似的表中至少有一个列，即category_id表自动递增列中的categories列，即id列，因此为了将您的论坛分类到您需要的特定类别中将类别添加到id表中的一个额外列中，使每个论坛的id值中都有它提到的类别。。！
然后您可以按类别列出论坛，如下所示：
注意：此代码将检查每个论坛类别，它将列出每个类别下的所有论坛。。！

<?php
//Assuming you have fetched whole data from forums table in $forums
//And whole data from categories in $categories
//So moving forward with the code

foreach ($categories  as $category) {
echo "<h1>".$category['category_title']."</h1>";
$category_id = $category['category_id'];
$query = mysqli_query($mysqli,"SELECT * FROM forums WHERE category_id='$category_id'");

$forums = array();
while ($rows = mysqli_fetch_array($query)) {
  $forums[] = $rows;
}

foreach ($forums as $forum) {
echo "Title :".$forum['forum_title']."</br>";
echo "Descripton :".$forum['forum_description']."</br></br></br>";
}
echo "</br></br></br></br>";
}
?>

工作代码示例：

<?php
$categories = array(
    array('id' => "04",'category_title' => "News & Support"),
    array('id' => "23",'category_title' => "Current Affairs"),
    array('id' => "12",'category_title' => "Politics"));

    $forums = array(
    array('forum_title' => "News 1",'category_id' => "04"),
    array('forum_title' => "News 2",'category_id' => "04"),
    array('forum_title' => "Current Afairs 1",'category_id' => "23"),
    array('forum_title' => "Current Afairs 2",'category_id' => "23"),
    array('forum_title' => "Politics 1",'category_id' => "12"),
    array('forum_title' => "Politics 2",'category_id' => "12"));

foreach ($categories  as $category) {
echo "<h1>".$category['category_title']."</h1>";
$category_id = $category['id'];
$output = array();
for ($i=0;$i<=count($forums);$i++) {
if  ($category_id == $forums[$i]['category_id']) {
$add_forum = array('forum_title' => $forums[$i]['forum_title'],'category_id' => $forums[$i]['category_id']);
array_push($output, $add_forum);
}
}
for ($i=0;$i<=count($output);$i++) {
echo "Title :".$output[$i]['forum_title']."</br>";
}
echo "</br></br></br></br>";
}
?>

输出：

News & Support

Title :News 1
Title :News 2


Current Affairs

Title :Current Afairs 1
Title :Current Afairs 2


Politics

Title :Politics 1
Title :Politics 2

关于php - 如何将不同的论坛归类为PHP，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37059624/