Sorting a mutidimensional complex array by value

Question

I have data in the following format:

Array
(
    [1] => User Object
        (
            [name] => 'John'
            [sAdr] => 'Addr1'
            [Children] => Array
                (
                    [101] => Children Object
                        (

                            [aChildren] => Array
                                (
                                    [0] => Child Object
                                        (
                                            [age] => 21
                                        )

                                    [1] => Child Object
                                        (

                                            [age] => 19
                                        )

                                )

                        )

                )

        )

    [2] => User Object
        (
            [name] => 'Jane'
            [sAdr] => 'Addr2'
            [Children] => Array
                (
                    [101] => Children Object
                        (

                            [aChildren] => Array
                                (
                                    [2] => Child Object
                                        (
                                            [age] => 32
                                        )

                                    [3] => Child Object
                                        (
                                            [age] => 17
                                        )

                                )

                        )

                )

        )

)

I want to sort it by age. The examples that i have seen didn't help me to achieve the sort. Can someone give me some direction. I dont need full logic, just some clues on how to achieve this.

Expected Output:

Array
    (
    [1] => User Object
        (
            [name] => 'John'
            [sAdr] => 'Addr1'
            [Children] => Array
                (
                    [101] => Children Object
                        (

                            [aChildren] => Array
                                (
                                    [0] => Child Object
                                        (
                                            [age] => 19
                                        )

                                    [1] => Child Object
                                        (

                                            [age] => 21
                                        )

                                )

                        )

                )

        )

    [2] => User Object
        (
            [name] => 'Jane'
            [sAdr] => 'Addr2'
            [Children] => Array
                (
                    [101] => Children Object
                        (

                            [aChildren] => Array
                                (
                                    [2] => Child Object
                                        (
                                            [age] => 17
                                        )

                                    [3] => Child Object
                                        (
                                            [age] => 32
                                        )

                                )

                        )

                )

        )

)

Sort what by age exactly? The first array level sorted by the *ages* of their children? How exactly should that work? Or the children in each array element? What do you expect the result to be? — deceze, Feb 06 '15 at 06:37
Take a look at http://stackoverflow.com/questions/1597736/how-to-sort-an-array-of-associative-arrays-by-value-of-a-given-key-in-php?rq=1 — MisterBla, Feb 06 '15 at 06:37
So, is there always going to be exactly one `['Children'][101]['aChildren']` array? Or multiple? Or what? — deceze, Feb 06 '15 at 07:15
It can be multiple. I just managed to do that myself. Sorry for taking your time. — TinTin1, Feb 06 '15 at 08:06

score 0 · Answer 1 · answered Feb 06 '15 at 06:37

0

You need to use usort. It sorts an array by its values using a user-supplied comparison function.

Please take a look at http://php.net/manual/en/function.usort.php

Check examples of it so that you'll get idea how to achieve this.

answered Feb 06 '15 at 06:37

J.K.A.

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score -1 · Answer 2 · answered Feb 06 '15 at 06:38

-1

You can do it by using a simple loop.

Like:

foreach($array as $a)
{
    //some code
}

answered Feb 06 '15 at 06:38

Wolfack

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Sorting a mutidimensional complex array by value

2 Answers2