嵌套 MySQL 查询 - 将数组作为输出

Question

我从这个页面上的答案开始PHP/mySQL - how to fetch nested rows into multidimensinal array，因为我正在处理表之间的相同类型的关系。我的代码现在看起来像这样：

$query=sprintf("SELECT * FROM product INNER JOIN production ON product.ID = production.product_ID");
    $data = mysql_query($query);
    $products = array();

while ($row = mysql_fetch_assoc($data))
{
    if (!isset($products[$row['product_ID']]))
    {
        $row['production'] = array();
        $products[$row['product_ID']] = $row;
    }

    $products[$row['product_ID']]['production'][] = $row;
}

foreach ($products as $product)
{
    foreach ($product['production'] as $item)
        //... do stuff
}

查询是可靠的——我已经直接在数据库上试过了。 我的问题是我无法计算出它说的最后一点 //... do stuff 无论我坚持使用哪种变量组合等，我都会得到 ArrayArrayArray （等）。我想要的是获得一个我可以使用的输出表。 我希望这是足够的信息，这是我在 StackOverflow 上的第一个问题。谢谢你。

当我执行 var_dump($item) 时，我得到一个长长的显示，看起来像这样：

array(9) { ["ID"]=> string(1) "2" ["product_name"]=> string(10) "Drums 12kg" ["order"]=> string(2) "20" ["hidden"]=> string(1) "0" ["id"]=> string(1) "4" ["product_ID"]=> string(1) "2" ["date"]=> string(10) "2012-09-07" ["quantity"]=> string(3) "130" ["production"]=> array(0) { } } array(8) { ["ID"]=> string(1) "2" ["product_name"]=> string(10) "Drums 12kg" ["order"]=> string(2) "20" ["hidden"]=> string(1) "0" ["id"]=> string(2) "21" ["product_ID"]=> string(1) "2" ["date"]=> string(10) "2012-07-13" ["quantity"]=> string(3) "705" } array(8) { ["ID"]=> string(1) "2" ["product_name"]=> string(10) "Drums 12kg" ["order"]=> string(2) "20" ["hidden"]=> string(1) "0" ["id"]=> string(2) "23" ["product_ID"]=> string(1) "2" ["date"]=> string(10) "2012-07-13" ["quantity"]=> string(2) "23" } array(8) { ["ID"]=> string(1) "2" ["product_name"]=> string(10) "Drums 12kg" ["order"]=> string(2) "20" ["hidden"]=> string(1) "0" ["id"]=> string(2) "26" ["product_ID"]=> string(1) "2" ["date"]=> string(10) "2012-07-13" ["quantity"]=> string(2) "23" } array(8) { ["ID"]=> string(1) "2" ["product_name"]=> string(10) "Drums 12kg" ["order"]=> string(2) "20" ["hidden"]=> string(1) "0" ["id"]=> string(2) "28" ["product_ID"]=> string(1) "2" ["date"]=> string(10) "2012-07-19" ["quantity"]=> string(2) "12" } array(9) { ["ID"]=> string(1) "3" ["product_name"]=> string(12) "Nibbles 12kg" ["order"]=> string(2) "65" ["hidden"]=> string(1) "0" ["id"]=> string(1) "5" ["product_ID"]=> string(1) "3" ["date"]=> string(10) "2012-09-07" ["quantity"]=> string(2) "10" ["production"]=> array(0) { } } array(8) { ["ID"]=> string(1) "3" ["product_name"]=> string(12) "Nibbles 12kg" ["order"]=> string(2) "65" ["hidden"]=> string(1) "0" ["id"]=> string(2) "10" ["product_ID"]=> string(1) "3" ["date"]=> string(10) "2012-09-07" ["quantity"]=> string(2) "10" } array(8) { ["ID"]=> string(1) "3" ["product_name"]=> string(12) "Nibbles 12kg" ["order"]=> string(2) "65" ["hidden"]=> string(1) "0" ["id"]=> string(2) "14" ["product_ID"]=> string(1) "3" ["date"]=> string(10) "2012-07-12" ["quantity"]=> string(3) "140" } array(8) { ["ID"]=> string(1) "3" ["product_name"]=> string(12) "Nibbles 12kg" ["order"]=> string(2) "65" ["hidden"]=> string(1) "0" ["id"]=> string(2) "16" ["product_ID"]=> string(1) "3" ["date"]=> string(10) "2012-07-12" ["quantity"]=> string(3) "220" } array(8) { ["ID"]=> string(1) "3" ["product_name"]=> string(12) "Nibbles 12kg" ["order"]=> string(2) "65" ["hidden"]=> string(1) "0" ["id"]=> string(2) "17" ["product_ID"]=> string(1) "3" ["date"]=> string(10) "2012-07-04" ["quantity"]=> string(3) "120" } array(9) { ["ID"]=> string(1) "4" ["product_name"]=> string(16) "Breast meat 12kg" ["order"]=> string(2) "40" ["hidden"]=> string(1) "0" ["id"]=> string(1) "6" ["product_ID"]=> string(1) "4" ["date"]=> string(10) "2012-09-07" ["quantity"]=> string(2) "20" ["production"]=> array(0) { } } array(8) { ["ID"]=> string(1) "4" ["product_name"]=> string(16) "Breast meat 12kg" ["order"]=> string(2) "40" ["hidden"]=> string(1) "0" ["id"]=> string(2) "11" ["product_ID"]=> string(1) "4" ["date"]=> string(10) "2012-09-07" ["quantity"]=> string(2) "20" } array(8) { ["ID"]=> string(1) "4" ["product_name"]=> string(16) "Breast meat 12kg" ["order"]=> string(2) "40" ["hidden"]=> string(1) "0" ["id"]=> string(2) "13" ["product_ID"]=> string(1) "4" ["date"]=> string(10) "2012-10-10" ["quantity"]=> string(2) "75" } array(9) { ["ID"]=> string(1) "5" ["product_name"]=> string(11) "Value Birds" ["order"]=> string(2) "50" ["hidden"]=> string(1) "0" ["id"]=> string(1) "7" ["product_ID"]=> string(1) "5" ["date"]=> string(10) "2012-09-07" ["quantity"]=> string(2) "40" ["production"]=> array(0) { } } array(8) { ["ID"]=> string(1) "5" ["product_name"]=> string(11) "Value Birds" ["order"]=> string(2) "50" ["hidden"]=> string(1) "0" ["id"]=> string(2) "12" ["product_ID"]=> string(1) "5" ["date"]=> string(10) "2012-09-07" ["quantity"]=> string(2) "40" } array(9) { ["ID"]=> string(1) "1" ["product_name"]=> string(11) "Thighs 12kg" ["order"]=> string(3) "105" ["hidden"]=> string(1) "1" ["id"]=> string(1) "8" ["product_ID"]=> string(1) "1" ["date"]=> string(10) "2012-10-01" ["quantity"]=> string(3) "500" ["production"]=> array(0) { } } array(9) { ["ID"]=> string(1) "7" ["product_name"]=> string(19) "Whole birds size 13" ["order"]=> string(2) "70" ["hidden"]=> string(1) "1" ["id"]=> string(2) "29" ["product_ID"]=> string(1) "7" ["date"]=> string(10) "2012-07-13" ["quantity"]=> string(3) "500" ["production"]=> array(0) { } } array(8) { ["ID"]=> string(1) "7" ["product_name"]=> string(19) "Whole birds size 13" ["order"]=> string(2) "70" ["hidden"]=> string(1) "1" ["id"]=> string(2) "30" ["product_ID"]=> string(1) "7" ["date"]=> string(10) "2012-07-13" ["quantity"]=> string(3) "500" } array(8) { ["ID"]=> string(1) "7" ["product_name"]=> string(19) "Whole birds size 13" ["order"]=> string(2) "70" ["hidden"]=> string(1) "1" ["id"]=> string(2) "31" ["product_ID"]=> string(1) "7" ["date"]=> string(10) "2012-07-19" ["quantity"]=> string(3) "500" } array(8) { ["ID"]=> string(1) "7" ["product_name"]=> string(19) "Whole birds size 13" ["order"]=> string(2) "70" ["hidden"]=> string(1) "1" ["id"]=> string(2) "32" ["product_ID"]=> string(1) "7" ["date"]=> string(10) "2012-07-13" ["quantity"]=> string(3) "500" } 

Answer 1

您将在最后两个 foreach 循环中构建表格的 html。我建议更好地命名您的列，因为在 item 中标识您的数组键的文本令人困惑（您有三个 ID 字段）。

print "<table><thead><tr><th>ID</th><th>Product</th><th>Order</th><th>Hidden</th><th>ID</th><th>Product ID</th><th>date</th><th>Quantity</th></tr></thead><tbody>";
foreach ($products as $product)
{
    foreach ($product['production'] as $item)
    {
        print "<tr>";        
        print "<td>$item['ID']</td>";
        print "<td>$item['product_name']</td>";
        print "<td>$item['order']</td>";
        print "<td>$item['hidden']</td>";
        print "<td>$item['id']</td>";
        print "<td>$item['product_id']</td>";
        print "<td>$item['date']</td>";
        print "<td>$item['quantity']</td>";
        print "</tr>";
    }
}
print "</tbody></table>";