Json 数组到数组

Question

我有一个来自 laravel 的 JSON 数组，如下所示：

Illuminate\Support\Collection Object
(
    [items:protected] => Array
        (
            [0] => Array
                (
                    [_id] => MongoDB\BSON\ObjectID Object
                        (
                            [oid] => 5a15e52b5bd98b7a0040fac8
                        )

                    [UnitPrice] => 18
                    [UnitsInStock] => 39
                )

            [1] => Array
                (
                    [_id] => MongoDB\BSON\ObjectID Object
                        (
                            [oid] => 5a15e52b5bd98b7a0040fac9
                        )

                    [UnitPrice] => 19
                    [UnitsInStock] => 17
                )

            [2] => Array
                (
                    [_id] => MongoDB\BSON\ObjectID Object
                        (
                            [oid] => 5a15e52b5bd98b7a0040faca
                        )

                    [UnitPrice] => 10
                    [UnitsInStock] => 13
                )

        )

)

如何只将UnitPrice和UnitsInStock作为数组？有没有不用循环的方法？

我想这样使用它：

...

->dataset('UnitPrice', [5,20,100,...]) // array's values = [5,20,100,...]

->dataset('UnitsInStock', [52,120,100,...]) // array's values = [52,120,100,...]

Answer 1

Laravel 有一个 lists method to get array for a given column. Otherwise, you can use the array_column 方法 PHP。

$unitPrices = array_column($items, 'UnitPrice');

Json 数组到数组

Json array to array

php

arrays

json

mongodb

php-mongodb