Php 嵌套MySQL查询-获取数组作为输出

我从本页的答案开始，因为我正在处理表之间的相同关系。我的代码现在如下所示：

$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
}

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" } 

查询是可靠的-我已经直接在数据库上尝试过了。 我的问题是，我无法计算出最后一点，它说//。。。做事 无论变量的组合是什么，我都坚持使用ArrayArray（等等）。我想要的是得到一个可以使用的输出表。 我希望这是足够的信息，这是我关于StackOverflow的第一个问题。多谢各位

当我执行var_dump（$item）时，我会看到一个长的显示，如下所示：

$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
}

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" } 

---

您将在最后两个foreach循环中构造表的html。我建议您更好地命名列，因为在项中标识数组键的文本比较混乱（您有三个ID字段）

打印“IDPRODUCTORDEHIDDENIDPRODUCT IDDATEQUOTE”；
foreach（$products as$product）
{
foreach（$product['production']作为$item）
{
打印“”；
打印“$item['ID']”；
打印“$item['product_name']”；
打印“$item['order']”；
打印“$item['hidden']”；
打印“$item['id']”；
打印“$item['product_id']”；
打印“$item['date']”；
打印“$item['quantity']”；
打印“”；
}
}
打印“”；

当您进行var\u dump（$item）时，您会得到什么？如果是数组，则很可能需要指定索引（$item[0]）或数组键（$item['key']）。如果有疑问，请转储数据并进行检查。我已更新了您的答案，非常感谢您的帮助。这是我现在看到的截图：你会想到这个吗？[链接]我已经更新了我的答案，将tr标签包含在内部循环中，这对我非常有帮助，我非常感谢您花时间回答我的问题。非常感谢。