获取与PHP中的特定值匹配的多维数组的所有键

Question

我有这个数组:

$transfers =
    Array
    (
        [0] => Array
            (
                [agency_to_id] => 8
                [agency_name] => 3.1 SUCURSAL BRASILIA
                [product_id] => 415
                [product_code] => 111021
                [product_name] => PAN FELIPE POR KILO
                [ptype_id] => 54
                [ptype_name] => 1.1.01.1 PANADERIA X KILO
                [catalog_id] => 1
                [subject_id] => 3
                [label_id] => 300000002
                [total_quantity] => 12
            )

        [1] => Array
            (
                [agency_to_id] => 9
                [agency_name] => 4.1 SUCURSAL CENTRO
                [product_id] => 415
                [product_code] => 111021
                [product_name] => PAN FELIPE POR KILO
                [ptype_id] => 54
                [ptype_name] => 1.1.01.1 PANADERIA X KILO
                [catalog_id] => 1
                [subject_id] => 3
                [label_id] => 300000002
                [total_quantity] => 8
            )

        [2] => Array
            (
                [agency_to_id] => 8
                [agency_name] => 3.1 SUCURSAL BRASILIA
                [product_id] => 416
                [product_code] => 111024
                [product_name] => GALLETA POR KILO
                [ptype_id] => 54
                [ptype_name] => 1.1.01.1 PANADERIA X KILO
                [catalog_id] => 1
                [subject_id] => 3
                [label_id] => 300000002
                [total_quantity] => 1.6
            )

        [3] => Array
            (
                [agency_to_id] => 8
                [agency_name] => 3.1 SUCURSAL BRASILIA
                [product_id] => 418
                [product_code] => 111028
                [product_name] => PAN INTEGRAL POR KILO
                [ptype_id] => 54
                [ptype_name] => 1.1.01.1 PANADERIA X KILO
                [catalog_id] => 1
                [subject_id] => 3
                [label_id] => 300000002
                [total_quantity] => 200
            )
    )

我希望得到这个数组中与特定子数组值匹配的所有键,例如我想得到匹配的键,[product_id] => 415我应该得到键0和1

我尝试过array_keys,但它不起作用.

编辑:

foreach ($transfers $key => $transfer) {
                     $found_keys = array_keys($transfers, $transfer['product_id']);
                }

所以,你的答案,是一个空数组

 foreach ($transfers $key => $transfer) {
                        $filteredKeys = array_keys(array_filter($transfers, 
                                        function($item) { 
                                           return $item['product_id'] === $transfer['product_id'];
                                         }));
                    }

你能帮我吗.谢谢

Answer 1

编辑后:

$found_keys = array();
foreach ($transfers as $key => $transfer) {
  if ($transfer['product_id'] === 415) $found_keys[] = $key;
}

在最初陈述的问题的解决方案下面:

使用array_filter如下:

$filtered = array_filter($transfers, 
                         function($item) { 
                            return $item['product_id'] === 415;
                         });

获得所有匹配的元素,完成.

要仅获取密钥,请将结果传递给array_keys:

$filteredKeys = array_keys(array_filter($transfers, 
                                        function($item) { 
                                           return $item['product_id'] === 415;
                                         }));

这是有效的,因为array_filter在结果数组中保留了源数组的键.