按所有级别的键对关联多维数组进行排序

Question

I have following array:

$data['uploads']['ccc'] = 'something';
$data['uploads']['bbb'] = 'something';
$data['uploads']['aaa'] = 'something';
$data['downloads']['ccc'] = 'something';
$data['downloads']['aaa'] = 'something';
$data['downloads']['bbb'] = 'something';

And I need it alphabetically sorted by keys, so final results needs to be:

$data['downloads']['aaa'] = 'something';
$data['downloads']['bbb'] = 'something';
$data['downloads']['ccc'] = 'something';
$data['uploads']['aaa'] = 'something';
$data['uploads']['bbb'] = 'something';
$data['uploads']['ccc'] = 'something';

Tried with various custom sort function, no luck.. Any idea?

Answer 1

ksort($data);

http://php.net/manual/en/function.ksort.php

Also from the comments in the PHP documentation:

Here is a function to recursively sort multidimentional arrays by key:

function deep_ksort(&$arr) { 
    ksort($arr); 
    foreach ($arr as &$a) { 
        if (is_array($a) && !empty($a)) { 
            deep_ksort($a); 
        } 
    } 
} 

Answer 2

You can use array_multisort http://www.php.net/manual/en/function.array-multisort.php .

<?php
   $ar = array(
   array("10", 11, 100, 100, "a"),
   array(   1,  2, "2",   3,   1)
  );
  array_multisort($ar[0], SORT_ASC, SORT_STRING,
            $ar[1], SORT_NUMERIC, SORT_DESC);
  var_dump($ar);
 ?>