php - 通过将单维数组的每个值与嵌套多维数组的“名称”键匹配来创建一个新的单维数组

Question

这是多维嵌套数组，称为multi：-

Array
(
    [0] => Array
        (
            [id] => 4d4b7104d754a06370d81259
            [name] => Arts & Entertainment
            [pluralName] => Arts & Entertainment
            [shortName] => Arts & Entertainment
            [icon] => Array
                (
                    [prefix] => https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_
                    [suffix] => .png
                )

            [categories] => Array
                (
                    [0] => Array
                        (
                            [id] => 56aa371be4b08b9a8d5734db
                            [name] => Amphitheater
                            [pluralName] => Amphitheaters
                            [shortName] => Amphitheater
                            [icon] => Array
                                (
                                    [prefix] => https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_
                                    [suffix] => .png
                                )

                            [categories] => Array
                                (
                                    [0] => Array
                                        (
                                            [id] => 4bf58dd8d48988d1f8931735
                                            [name] => Bed & Breakfast
                                            [pluralName] => Bed & Breakfasts
                                            [shortName] => B & B
                                            [icon] => Array
                                                (
                                                    [prefix] => https://ss3.4sqi.net/img/categories_v2/travel/bedandbreakfast_
                                                    [suffix] => .png
                                                )

                                            [categories] => Array
                                                (
                                                )

                                        )

                                    [1] => Array
                                        (
                                            [id] => 4f4530a74b9074f6e4fb0100
                                            [name] => Boarding House
                                            [pluralName] => Boarding Houses
                                            [shortName] => Boarding
                                            [icon] => Array
                                                (
                                                    [prefix] => https://ss3.4sqi.net/img/categories_v2/travel/hotel_
                                                    [suffix] => .png
                                                )

                                            [categories] => Array
                                                (
                                                )

                                        )

                                )

                        )

                    [1] => Array
                        (
                            [id] => 4fceea171983d5d06c3e9823
                            [name] => Aquarium
                            [pluralName] => Aquariums
                            [shortName] => Aquarium
                            [icon] => Array
                                (
                                    [prefix] => https://ss3.4sqi.net/img/categories_v2/arts_entertainment/aquarium_
                                    [suffix] => .png
                                )

                            [categories] => Array
                                (
                                )

                        )
        )

    [1] => Array
        (
            [id] => 4d4b7105d754a06372d81259
            [name] => College & University
            [pluralName] => Colleges & Universities
            [shortName] => College & Education
            [icon] => Array
                (
                    [prefix] => https://ss3.4sqi.net/img/categories_v2/education/default_
                    [suffix] => .png
                )

            [categories] => Array
                (
                    [0] => Array
                        (
                            [id] => 4bf58dd8d48988d198941735
                            [name] => College Academic Building
                            [pluralName] => College Academic Buildings
                            [shortName] => Academic Building
                            [icon] => Array
                                (
                                    [prefix] => https://ss3.4sqi.net/img/categories_v2/education/academicbuilding_
                                    [suffix] => .png
                                )

                            [categories] => Array
                                (
                                    [0] => Array
                                        (
                                            [id] => 4bf58dd8d48988d199941735
                                            [name] => College Arts Building
                                            [pluralName] => College Arts Buildings
                                            [shortName] => Arts
                                            [icon] => Array
                                                (
                                                    [prefix] => https://ss3.4sqi.net/img/categories_v2/arts_entertainment/default_
                                                    [suffix] => .png
                                                )

                                            [categories] => Array
                                                (
                                                )

                                        )

                                )

                        )

                    [1] => Array
                        (
                            [id] => 4bf58dd8d48988d197941735
                            [name] => College Administrative Building
                            [pluralName] => College Administrative Buildings
                            [shortName] => Administrative Building
                            [icon] => Array
                                (
                                    [prefix] => https://ss3.4sqi.net/img/categories_v2/education/administrativebuilding_
                                    [suffix] => .png
                                )

                            [categories] => Array
                                (
                                )

                        )

                )
       )
)

这是一维数组，称为single：-

array(
  [0] => 'Aquarium',
  [1] => 'Amphitheater'
)

我想创建一个函数，该函数将递归地遍历多维数组，并且当 的值与 的single“名称”键匹配时multi，将形成一个新数组，其中将包含与匹配的每个节点的“id”和“名称” single。

我该怎么做？

这是我试图做的，但不知何故无法弄清楚如何进行递归调用：-

public static function array_flatten($fs_array, $cat_array) { 
        if (!is_array($fs_array)) { 
            return FALSE; 
        } 
        $result = array(); 
        foreach ($fs_array as $key => $value) 
        { 
            if(in_array($value['name'], $cat_array))
                    $result[] = $value['id']; 
        } 
        return $result; 
}

标签： phparraysmultidimensional-array

Answer 1

我根据您的示例构建了一个解决方案。我没有测试它，但它背后的想法是：

您检查是否有一个“类别”键，它是一个数组，如果有，则获取该子数组并将其再次传递给 flatten_array。递归调用的返回值随后将被合并到 $result 数组中。

public static function array_flatten($fs_array, $cat_array) { 
        if (!is_array($fs_array)) { 
            return FALSE;
        } 
        $result = array(); 
        foreach ($fs_array as $key => $value) 
        { 
            if(in_array($value['name'], $cat_array)) {
                $result[] = $value['id'];
            }
            // ----- here starts what I added -----------
            if (is_array($value['categories'])) {
                $result = array_merge($result, self::array_flatten($value['categories'], $cat_array));
            }
            // ----- here ends what I added -----------
        } 
        return $result; 
}