Sort array by value within secondary array php

Question

Below I have an array that I generate, I need to order each by the 3rd [2] values.

Array:

{
aknox: {
    0: "28",
    1: "39",
    2: "71.79"
    },
    lphillips: {
    0: "81",
    1: "106",
    2: "76.42"
    }
}

Expected result:

{
    lphillips: {
    0: "81",
    1: "106",
    2: "76.42"
    },
    aknox: {
    0: "28",
    1: "39",
    2: "71.79"
    }
}

I have tried the following:

usort($ccstats, function($a, $b) {
   return strcmp($a[2], $b[2]);
});

$ccstats being the array.

This returns the array in ascending order when I tried to make array keys in descending order i.e. "akonx" and "lphillips" get lost and turned into 0 and 1

Any help appreciated

use uasort and the inverse of what you have strcmp($b[2], $a[2]); — ArtisticPhoenix
– ArtisticPhoenix, Commented Jul 7, 2017 at 9:15

u_mulder · Accepted Answer · 2017-07-07 09:15:21Z

1

To preserve keys use uasort:

uasort($ccstats, function($a, $b) {
   return strcmp($a[2], $b[2]);
});

If you say that you have ascending order but want descending, then just swap arguments in strcmp

uasort($ccstats, function($a, $b) {
   return strcmp($b[2], $a[2]);
});

answered Jul 7, 2017 at 9:15

u_mulder

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