根据值创建多维数组

Question

我花了几个小时试图找到这个问题的答案，但我很挣扎。我相当熟悉 PHP 和各种内置函数，并且可以构建一个复杂的 foreach() 循环来执行此操作，但我想我会问问是否有人对我的问题有更聪明的解决方案. 我有一个这种形式的数组，现在我想根据 list_id 匹配下一个 instance.I 将其转换为多维尝试了这个解决方案但效果不佳。这可能是重复的，但这里没有输出

<pre>Array
(
    [0] => Array
        (
            [list_id] => 5
            [order_list_name] => meri list 3
            [0] => Array
                (
                    [list_id] => 5
                    [product_id] => 1
                    [product_name] => DUCHESS WHITE WINE 200 ml
                    [sku] => SKU0001
                    [qty] => 2
                )

        )

    [1] => Array
        (
            [list_id] => 5
            [order_list_name] => meri list 3
            [0] => Array
                (
                    [list_id] => 5
                    [product_id] => 2
                    [product_name] => CONNEXION DOUBLE ROCK 350 ml, Pack of 2
                    [sku] => SKU0002
                    [qty] => 8
                )

        )

    [2] => Array
        (
            [list_id] => 7
            [order_list_name] => meri list 9
            [0] => Array
                (
                    [list_id] => 7
                    [product_id] => 2
                    [product_name] => CONNEXION DOUBLE ROCK 350 ml, Pack of 2
                    [sku] => SKU0002
                    [qty] => 2
                )

        )

)

我期待这样的输出

<pre>Array
    (
        [0] => Array
            (
                [list_id] => 5
                [order_list_name] => meri list 3
                [0] => Array
                    (
                        [list_id] => 5
                        [product_id] => 1
                        [product_name] => DUCHESS WHITE WINE 200 ml
                        [sku] => SKU0001
                        [qty] => 2
                    ),
                [1] => Array
                    (
                        [list_id] => 5
                        [product_id] => 1
                        [product_name] => DUCHESS WHITE WINE 200 ml
                        [sku] => SKU0001
                        [qty] => 2
                )
    
            )
        [1] => Array
            (
                [list_id] => 7
                [order_list_name] => meri list 9
                [0] => Array
                    (
                        [list_id] => 7
                        [product_id] => 2
                        [product_name] => CONNEXION DOUBLE ROCK 350 ml, Pack of 2
                        [sku] => SKU0002
                        [qty] => 2
                    )
    
            )
    
    )

Answer 1

根据list_id使用临时一级密钥组。完成后，使用 array_values().

删除临时密钥

$grouped = [];
foreach ($records as $record) {
    if (!isset($grouped[$record['list_id']])) {
        $grouped[$record['list_id']] = [
            'list_id' => $record['list_id'],
            'order_list_name' => $record['order_list_name']
        ];
    }
    $grouped[$record['list_id']][] = [
        'list_id' => $record['list_id'],
        'product_id' => $product->getId(),
        'product_name' => $product->getName(),
        'sku' => $product->getSku(),
        'qty' => $record['qty']
    ];
}
var_export(
    array_values($grouped)
);

删除条件也会产生相同的结果；它只会默默地覆盖两个关联元素。

$grouped = [];
foreach ($records as $record) {
    $grouped[$record['list_id']]['list_id'] = $record['list_id'];
    $grouped[$record['list_id']]['order_list_name'] = $record['order_list_name'];
    $grouped[$record['list_id']][] = [
        'list_id' => $record['list_id'],
        'product_id' => $product->getId(),
        'product_name' => $product->getName(),
        'sku' => $product->getSku(),
        'qty' => $record['qty']
    ];
}
var_export(
    array_values($grouped)
);

根据值创建多维数组

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