如何在同一个表中用tbody标签分隔每个类别

Question

我有这个代码，用于构建一个表，其中每个建筑物将创建一个新表，其中包含标题标记，其中包含建筑物名称，并使用也具有tr的tbody将每个人和计算机分组到各自的扇区中在每个小组之前使用其名称。 类似的东西：

        <table class="table table-bordered table-condensed">
            <caption>Building 1</caption>
            <tbody>
                <tr class="title"><td>Sector1</td></tr>
                <tr><td>Person 1</td></tr>
                <tr><td>Person 2</td></tr>
                <tr><td>Person 3</td></tr>
            </tbody>
            <tbody>
                <tr class="title"><td>Sector2</td></tr>
                <tr><td>Person 1</td></tr>
                <tr><td>Person 2</td></tr>
                <tr><td>Person 3</td></tr>
            </tbody>
        </table>
        <table class="table table-bordered table-condensed">
            <caption>Building 2</caption>
            <tbody>
                <tr class="title"><td>Sector1</td></tr>
                <tr><td>Person 1</td></tr>
                <tr><td>Person 2</td></tr>
                <tr><td>Person 3</td></tr>
            </tbody>
        </table>

我开始（坚持）这个：

        if ($STH->fetch() > 0):
            $sector;
            $building;
            $tbodyf = "<tbody><tr class='primary'><th colspan='2'>Building: %s</th></tr>\n";
            $tbodytitle = "\n<tr class='info'>\n<td colspan='2'><b>Sector: %s</b></td>\n</tr>\n";
            $tbodytr = "<tr><td>%s</td><td>%s</td></tr>\n";


            while ($row = $STH->fetch()) {

                if ($row->building !== $building) {
                    $building = $row->building;
                    printf($tbodyf, $building);
                }

                if ($row->sector !== $sector) {
                    $sector = $row->sector;
                    printf($tbodytitle, $sector);
                }
                printf($tbodytr, $row->person, $row->hostname);
            }
        else:
            echo '<h3>Nothing to see!</h3>';
        endif;