How to sort multidimensional array in php?

Question

I have to sort the given array on date key in PHP. I have tried it using array_multisort but not able to sort it. which one is more appropriate usort or array_multisort?

Array
(
    [165953] => Array
        (
            [0] => Array
                (
                    [wallet_transaction_id] => 165953
                    [wallet_currency_id] => 2
                    [description] => updating SC Dollars by 100.00 from PSM product transaction.
                    [amount] => 100.00
                    [date] => 2013-11-13 08:08:05
                )

            [1] => Array
                (
                    [wallet_transaction_id] => 165953
                    [wallet_currency_id] => 3
                    [description] => updating Spy Points by 50.00 from PSM product transaction.
                    [amount] => 50.00
                    [date] => 2013-11-13 06:08:05
                )

        )

    [165952] => Array
        (
            [0] => Array
                (
                    [wallet_transaction_id] => 165952
                    [wallet_currency_id] => 2
                    [description] => updating SC Dollars by 100.00 from PSM product transaction.
                    [amount] => 100.00
                    [date] => 2013-11-13 05:02:11
                )

            [1] => Array
                (
                    [wallet_transaction_id] => 165952
                    [wallet_currency_id] => 3
                    [description] => updating Spy Points by 50.00 from PSM product transaction.
                    [amount] => 50.00
                    [date] => 2013-11-13 08:02:11
                )

        )
)

What do you want the result to look like? I assume for each element in the array (`165953` and `165952`), you want to sort that array... is that right? — gen_Eric, Nov 15 '13 at 16:28
It is a duplicate. The first answer there works best memory-wise, and speed-wise. — Alex, Nov 15 '13 at 16:31

score 0 · Answer 1 · answered Nov 15 '13 at 16:29

0

You should look the usort function. It let's you define your own comparison function.

http://www.php.net/manual/en/function.usort.php

answered Nov 15 '13 at 16:29

William Vbl

503
3
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How to sort multidimensional array in php?

1 Answers1