循环遍历PHP多维数组

Question

============== PHP ===============
$INV_PRINT = array(
  "INV101"=> array(

    array(
      "Prod_Code"=>"ABC123",
      "Qty"=>"1"),

    array(
      "Prod_Code"=>"XYZ909",
      "Qty"=>"2"),

    array(
      "Prod_Code"=>"LMN456",
      "Qty"=>"1")),

"INV201"=> array(

   array(
      "Prod_Code"=>"POL356",
      "Qty"=>"3"),

    array(
      "Prod_Code"=>"QWE356",
      "Qty"=>"4"),

    array(
      "Prod_Code"=>"KIL765",
      "Qty"=>"2")),
);
============== PHP ===============

============== Browser Output ===============
Array
(
    [INV101] => Array
        (
            [0] => Array
                (
                    [Prod_Code] => ABC123
                    [Qty] => 1
                )

            [1] => Array
                (
                    [Prod_Code] => XYZ909
                    [Qty] => 2
                )

            [2] => Array
                (
                    [Prod_Code] => LMN456
                    [Qty] => 1
                )

        )

    [INV201] => Array
        (
            [0] => Array
                (
                    [Prod_Code] => POL356
                    [Qty] => 3
                )

            [1] => Array
                (
                    [Prod_Code] => QWE356
                    [Qty] => 4
                )

            [2] => Array
                (
                    [Prod_Code] => KIL765
                    [Qty] => 2
                )

        )

)
============== Browser Output ===============

我正在制作网络发票打印机。用户可以选择他们想要打印的发票。 唯一的发票 ID 将链接到产品数据库并获取其下的产品。 我的麻烦是，我不知道如何将数据库值插入数组并循环它以获取它包含的所有值。

输出应该是这样的：-

===================
Invoice No : INV101
Date : 21/02/2020

Product        Qty
ABC123          1
XYZ909          2
LMN456          1
===================
===================
Invoice No : INV201
Date : 21/02/2020

Product        Qty
POL356          3
QWE356          4
KIL765          2
===================

我真的对这个深度数组感到困惑。

Answer 1

foreach ($INV_PRINT as $inv => $products) {
    echo '===================' . PHP_EOL;
    echo 'Invoice No : ' . $inv . PHP_EOL;
    echo 'Date: ' . date('m/d/Y') . PHP_EOL;
    echo 'Product     Qty' . PHP_EOL;
    
    foreach ($products as $product) {
        echo $product['Prod_Code'] . '      ' . $product['Qty'] . PHP_EOL;
    }

    echo '===================' . PHP_EOL;
}