Question

there’s nothing much to explain, i’ll straight get to the sample code:

<?php
$array[0]['a'] = 3;
$array[0]['b'] = 2;
$array[0]['c'] = 4;
$array[0]['d'] = 1;

$array[1]['a'] = 4;
$array[1]['b'] = 2;
$array[1]['c'] = 3;
$array[1]['d'] = 1;

$array[2]['a'] = 1;
$array[2]['b'] = 2;
$array[2]['c'] = 4;
$array[2]['d'] = 3;
?>

after sorting, it should look like:

<?php

$array[0]['d'] = 1;
$array[0]['b'] = 2;
$array[0]['a'] = 3;
$array[0]['c'] = 4;


$array[1]['d'] = 1;
$array[1]['b'] = 2;
$array[1]['c'] = 3;
$array[1]['a'] = 4;

$array[2]['a'] = 1;
$array[2]['b'] = 2;
$array[2]['d'] = 3;
$array[2]['c'] = 4;
?>

can’t really get my head around it. in a nutshell: i don’t wanna sort whole array, but instead i wanna sort specific dimensions of an array

Answer 1

Use foreach to go down a level, and then sort each subarray. There are a few ways you can do this:

foreach($arr as &$sub) asort($sub);
// OR
foreach($arr as $k=>$sub) asort($arr[$k]);
// OR
foreach(array_keys($arr) as $k) asort($arr[$k]);