使用rowspan PHP创建动态表

如何使用PHP从MySQL检索的数据创建表

-------------------------
| albumID   |  trackID  |
-------------------------
|           |  1990     |
-    1      -------------
|           |  1991     |
-------------------------
|           |  1992     |
-           -------------
|    2      |  1993     |
-           -------------
|           |  1994     |
-------------------------

我可以从数据库中生成一个表，但结果只与一行中的每个结果相似

$query = "SELECT albumID, trackID
          FROM songs";

$result = mysqli_query($db, $query);

echo "<table>";
echo "<tr>\n";
echo "<th>albumID</th>\n";
echo "<th>trackID</th>\n";
echo "</tr>\n";

while ($data = mysqli_fetch_array($result)) {
    echo "<tr>\n";
    echo "<td>$data[0]</td>\n";
    echo "<td>$data[1]</td>\n";
    echo "</tr>\n";
}

echo "</table>\n";

---

非常感谢您给予的任何帮助

您可以使用一个变量来跟踪当前相册，只输出一次相册，如下所示

$current_album = ''; # initialize tracking var 
while ($data = mysqli_fetch_array($result)) {
    echo "<tr>\n";
    if ($current_album != $data[0]) {
        echo "<td>$data[0]</td>\n";
        $current_album = $data[0];
    } else {
        echo "<td>&nbsp;</td>\n"; # insert empty cell
    }
    echo "<td>$data[1]</td>\n";
    echo "</tr>\n";
}

---

这将使相册ID显示在相册的第一行中。如果希望它垂直居中，可以在td元素上使用rowspan，但为了知道每个相册有多少行，您需要更新sql查询以返回该行，或者您可以将结果处理为多维数组，然后通过该数组循环生成输出。

可能不是最优雅的解决方案，但我们应该做到这一点

$query = "select albumID as album, group_concat(trackID) as tracks from songs group by albumID";

$result = mysqli_query($db, $query);

echo "<table>";
echo "<tr>\n";
echo "<th>albumID</th>\n";
echo "<th>trackID</th>\n";
echo "</tr>\n";

while ($data = mysqli_fetch_array($result)) {
    $tracks = explode(",", $data[1]);

    echo "<tr>\n";
    echo "<td rowspan=\"".count($tracks)."\">$data[0]</td>\n";

    foreach ($tracks as $key => $value) {
        echo "<td>$value</td>\n"
    }

    echo "</tr>\n";
}

echo "</table>\n";

---

编辑查询以返回相册的曲目数量，并使用该数量仅在第一个曲目行上创建行范围。我写了一个小例子，但我没有试过它是否有效

$query = "SELECT s.albumID, s.trackID, 
          ( SELECT COUNT(*) 
            FROM songs s2 
            WHERE s2.albumID = s.albumID )
          FROM songs s";

$result = mysqli_query($db, $query);

echo "<table>";
echo "<tr>\n";
echo "<th>albumID</th>\n";
echo "<th>trackID</th>\n";
echo "</tr>\n";

$tmpAlbum = '';

    while ($data = mysqli_fetch_array($result)) {
          echo "<tr>\n";
          echo "<td";

          if($data[2] == 1){
              echo "<td>$data[0]</td>\n";
          }else{
               if($data[0] != $tmpAlbum){
                    echo "<td rowspan=\"".$data[2]."\">$data[0]</td>\n";
                }
          }

          $tmpAlbum = $data[0];


          echo "<td>$data[1]</td>\n";
          echo "</tr>\n";
    }

echo "</table>\n";

---

如果你想连接电池，你可以看看td的ROWSPAN问题是我不能自动连接，先生，我不知道该怎么办