Question

资助几个函数来排序数组，但如果它们是stdClass对象，或者至少我找不到合适的数据，它们都不能对它们进行排序

我需要通过排序值

对此数组进行排序

 [data] => Array
                (
                    [0] => stdClass Object
                        (
                            [id] => 12
                            [name] => Title1
                            [ordering] => 1
                        )

                    [1] => stdClass Object
                        (
                            [id] => 14
                            [name] => Title2
                            [ordering] => 3
                        )

                    [2] => stdClass Object
                        (
                            [id] => 18
                            [name] => Title4
                            [ordering] => 2
                        )

                    [3] => stdClass Object
                        (
                            [id] => 22
                            [name] => Title5
                            [ordering] => 4
                        )

                )

任何帮助表示赞赏。谢谢！

Answer 1

根据对象的ordering字段定义自定义排序函数，然后使用usort传递它。

docs for usort

function sortByOrdering($obj1, $obj2) {
   return $obj2->ordering - $obj1->ordering;
}

usort($input['data'], 'sortByOrdering');

请注意，由于$input = usort(...)

中引用了数组，因此无需重新分配usort

Answer 2

谢谢，SiGanteng！这就是我想要的。

我注意到生成的排序顺序正在下降。我能够通过对函数的简单更改来解决这个问题 - 我在return语句中交换了$ obj1和$ obj2：

return $obj1->ordering - $obj2->ordering;

在我的应用程序中，数组数据为：

Array
(
    [3] => stdClass Object
        (
            [term_id] => 3
            [name] => Salesperson
            [slug] => 01-salesperson
            [term_group] => 0
            [term_order] => 0
            [term_taxonomy_id] => 3
            [taxonomy] => skill
            [description] => 
            [parent] => 0
            [count] => 6
            [object_id] => 53
        )

    [5] => stdClass Object
        (
            [term_id] => 5
            [name] => Airport Security
            [slug] => 02-airport-security
            [term_group] => 0
            [term_order] => 0
            [term_taxonomy_id] => 5
            [taxonomy] => skill
            [description] => 
            [parent] => 0
            [count] => 30
            [object_id] => 575
        )

    [4] => stdClass Object
        (
            [term_id] => 4
            [name] => Baker
            [slug] => 03-baker
            [term_group] => 0
            [term_order] => 0
            [term_taxonomy_id] => 4
            [taxonomy] => skill
            [description] => 
            [parent] => 0
            [count] => 28
            [object_id] => 453
        )
)

使用上面的数据，我需要按“slug”值按升序对数组$ skills_nav求助。这是完成任务的最终代码：

function sortByOrdering($obj1, $obj2) {
   return $obj1->slug - $obj2->slug;
}
usort($skills_nav, 'sortByOrdering');

为了向读者进一步解释，函数sortByOrdering所期望的两个参数由USORT自动提供。这可以通过手册中的USORT函数来解释。

按值与stdClass对象组合对多维数组进行排序

2 个答案: