PHP：计算stdClass对象

我有一个从json_decode创建的stdClass对象,当我运行count($obj)函数时,它不会返回正确的数字.该对象有30个属性,但count()函数的返回值为1.

有任何想法吗？

以下是其中一个对象的示例. (我正在从Twitter请求每日趋势信息).如果此对象具有多个属性,则count($obj)将等于1.

[trends] => stdClass Object
    (
        [2009-08-21 11:05] => Array
            (
                [0] => stdClass Object
                    (
                        [query] => "Follow Friday"
                        [name] => Follow Friday
                    )

                [1] => stdClass Object
                    (
                        [query] => "InglourIoUs Basterds" OR "InglorIoUs Basterds"
                        [name] => InglourIoUs Basterds
                    )

                [2] => stdClass Object
                    (
                        [query] => InglourIoUs
                        [name] => InglourIoUs
                    )

                [3] => stdClass Object
                    (
                        [query] => #songsincode
                        [name] => #songsincode
                    )

                [4] => stdClass Object
                    (
                        [query] => #shoutout
                        [name] => #shoutout
                    )

                [5] => stdClass Object
                    (
                        [query] => "district 9"
                        [name] => district 9
                    )

                [6] => stdClass Object
                    (
                        [query] => #howmanypeople
                        [name] => #howmanypeople
                    )

                [7] => stdClass Object
                    (
                        [query] => Ashes OR #ashes
                        [name] => Ashes
                    )

                [8] => stdClass Object
                    (
                        [query] => #youtubefail
                        [name] => #youtubefail
                    )

                [9] => stdClass Object
                    (
                        [query] => TGIF
                        [name] => TGIF
                    )

                [10] => stdClass Object
                    (
                        [query] => #wish09
                        [name] => #wish09
                    )

                [11] => stdClass Object
                    (
                        [query] => #watch
                        [name] => #watch
                    )

                [12] => stdClass Object
                    (
                        [query] => Avatar
                        [name] => Avatar
                    )

                [13] => stdClass Object
                    (
                        [query] => Ramadhan
                        [name] => Ramadhan
                    )

                [14] => stdClass Object
                    (
                        [query] => Goodnight
                        [name] => Goodnight
                    )

                [15] => stdClass Object
                    (
                        [query] => iPhone
                        [name] => iPhone
                    )

                [16] => stdClass Object
                    (
                        [query] => #iranelection
                        [name] => #iranelection
                    )

                [17] => stdClass Object
                    (
                        [query] => Apple
                        [name] => Apple
                    )

                [18] => stdClass Object
                    (
                        [query] => "Usain Bolt"
                        [name] => Usain Bolt
                    )

                [19] => stdClass Object
                    (
                        [query] => H1N1
                        [name] => H1N1
                    )

            )
     )

解决方法:

问题是count用于计算数组中的索引,而不是对象上的属性(除非它是实现Countable接口的自定义对象).尝试将对象(如下所示)作为数组投射,并查看是否有帮助.

$total = count((array)$obj);

简单地将对象作为数组进行转换并不总是有效,但作为一个简单的stdClass对象,它应该在这里完成工作.