Question

所以我一直试图计算这个对象阵列多年，似乎没有什么对我有用......

stdClass Object
(
    [type] => champion
    [version] => 5.24.2
    [data] => stdClass Object
        (
            [Thresh] => stdClass Object
                (
                    [id] => 412
                    [key] => Thresh
                    [name] => Thresh
                    [title] => the Chain Warden
                    [info] => stdClass Object
                        (
                            [attack] => 5
                            [defense] => 6
                            [magic] => 6
                            [difficulty] => 7
                        )

                )

            [Aatrox] => stdClass Object
                (
                    [id] => 266
                    [key] => Aatrox
                    [name] => Aatrox
                    [title] => the Darkin Blade
                    [info] => stdClass Object
                        (
                            [attack] => 8
                            [defense] => 4
                            [magic] => 3
                            [difficulty] => 4
                        )

                )

            [Tryndamere] => stdClass Object
                (
                    [id] => 23
                    [key] => Tryndamere
                    [name] => Tryndamere
                    [title] => the Barbarian King
                    [info] => stdClass Object
                        (
                            [attack] => 10
                            [defense] => 5
                            [magic] => 2
                            [difficulty] => 5
                        )

                )

            [Ezreal] => stdClass Object
                (
                    [id] => 81
                    [key] => Ezreal
                    [name] => Ezreal
                    [title] => the Prodigal Explorer
                    [info] => stdClass Object
                        (
                            [attack] => 7
                            [defense] => 2
                            [magic] => 6
                            [difficulty] => 7
                        )

                )

        )

)

我想要计算的是data的长度。

Plot Twist： count($array->data)无法正常工作。

如果它是正确的，它应该返回3.提前谢谢！

Answer 1

在您的情况下，data是一个对象。把它投射到数组：

 $count = count((array) $array->data);

另一种方法是使用get_object_vars

$count = count(get_object_vars($array->data));

Answer 2

不是那么难，你可以这样做：

$object = [ .... ]; // The object you show above.

function countElements($object) {
    return count(get_object_vars($object));
}

$count = countElements($object);

那应该能得到答案。

get_object_vars()文档。

Answer 3

在代码下方使用：

count((array)$array->data);

而不是：

count($array->data);

Answer 4

只需使用count((array) $array->data);

即可

如何计算这个对象数组？

4 个答案: