如何根据表格标题和第一行值的组合在表格单元格中放置值？

Question

下面是我的mysql表结构，里面的值不固定，管理员可以修改。

town_name | product_name| pending_quantity
------------------------------------------
 Jaipur   | Mobile      | 5
 Jaipur   | Charger     | 3
 Surat    | wallet      | 2
 Surat    | Mobile      | 1
 Surat    | battery     | 3
 Surat    | cover       | 2

在我的 php 代码中，我将所有这些值存储在 3 个不同的数组中（每列一个），一切都很好。我想在 HTML 表格中显示这些数据，但它需要显示的结构对我来说是个问题。下面是预期的 HTML 表格结构。

town_name | Mobile | charger | wallet | Battery | cover
-------------------------------------------------------
 Jaipur   | 5      | 3       |        |         |     
 Surat    | 1      |         |  2     |  3      | 2

到目前为止，我已经实现了以应有的方式显示行和列标题。但我现在无法将待处理的数量值放在它的位置。

如果有任何帮助，这是我的 php 代码

<tbody>
                    <?php
                        $count = 1;
                        $row=0;
                        foreach($townid as $townKey=>$townValue) {
                            echo "<tr>";
                            echo "<td>$count</td>";
                            echo "<td>$townValue</td>";
                            foreach($items as $productKey=>$productValue) {
                                echo "<td>$pendingqty[$townKey]</td>";  
                                $row++;
                            }
                            $row++;
                            echo "</tr>";
                            $count++;
                        }
                    ?>
                </tbody>

列标题（手机、充电器等）是动态的，城镇名称也是动态的。请帮助我通过 mysql 或 html 实现所需的结果。

在数组中获取值的 PHP 代码

$townid2 = array();
$itemname = array();
$pendingqty = array();
$items = array();
    
    $query = mysql_query("select o.town_id as townid, od.item_name as itemname, sum(od.pending_qnty) as pendingqty FROM tbl_order o JOIN tbl_order_data od on o.id = od.order_id where month(o.order_date)='1' GROUP BY o.town_id, od.item_name  ");
    while($row = mysql_fetch_array($query)) {
        $townid2[]=$row['townid'];
        $pendingqty[] = $row['pendingqty'];
        $items[] = $row['itemname']; 
    }
    
    $townid = array_unique($townid2, SORT_REGULAR); 

$query2 = mysql_query("select od.item_name FROM tbl_order_data od JOIN tbl_order o on o.id=od.order_id where od.order_id IN (select id from tbl_order where month(order_date)='1') group by od.item_name order by o.item_name ");
    $productArray = array();
    while($row2 = mysql_fetch_array($query2)) { 
        $productArray[] = $row2['item_name'];
    }

Answer 1

我会这样做（我正在使用 mysql_query，因为你这样做了，但它已被弃用，所以你真的应该切换）：

$things = array();
$columns = array('Mobile','charger','wallet','Battery','cover'); //this can/should be populated dynamically using a distinct product query, but I'm hard-coding it because I'm lazy
$query = mysql_query("select o.town_id as townid, od.item_name as itemname, sum(od.pending_qnty) as pendingqty FROM tbl_order o JOIN tbl_order_data od on o.id = od.order_id where month(o.order_date)='1' GROUP BY o.town_id, od.item_name");
while($row = mysql_fetch_array($query)) {
    $things[$row['townid']][$row['itemname']] = $row['pendingqty'];
}

... //whatever code until you're ready for the table

echo "<table><thead><tr>";
foreach($columns as $column){
    echo "<th>".$column."</th>";
}
echo "</tr><thead><tbody>";
foreach($things as $key=>$value){
    echo "<tr><td>".$key."</td>";
    foreach($columns as $column){
        echo "<td>".(isset($value[$column]) ? $value[$column] : null)."</td>";
    }
    echo "</tr>";
}
echo"</tbody></table>";

Answer 2

这是我的看法

$itemnames = array();
$pendingqtys = array();

$query = mysql_query("SELECT 
    od.item_name AS itemname
FROM
    tbl_order o
JOIN
    tbl_order_data od ON o.id = od.order_id
WHERE
    MONTH(o.order_date) = '1'
GROUP BY o.town_id");
while($row = mysql_fetch_array($query)) {
    $itemnames[] = $row['itemname'];
}

$query = null;
$query = mysql_query("SELECT  
    o.town_id AS townid, 
    od.item_name AS itemname, 
    SUM(od.pending_qnty) AS pendingqty 
FROM 
    tbl_order o 
        JOIN 
    tbl_order_data od ON o.id = od.order_id 
WHERE
    MONTH(o.order_date) = '1' 
GROUP BY o.town_id , od.item_name");
while($row = mysql_fetch_array($query)){
    $pendingqtys[$row['townid']][$row['itemname']]=$row['pendingqty'];
}

然后显示结果

echo "<table><thead><tr><th>Town Names</th>";
    foreach($itemnames as $itemname){
        echo "<th>".$itemname."</th>";
    }
echo "</tr></thead><tbody>";
    foreach ($pendingqtys as $town => $pendingqty){
        echo "<tr><th>".$town."</th>";
        foreach ($itemnames as $itemname){
            echo "<td>".$pendingqty[$itemname]."</td>";
        }
        echo "</tr>";
    }
echo "</tbody></table>";