如何在PHP中通过键对关联多维数组进行排序？

Question

我有以下阵列：

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

，我需要它的字母顺序对关键字排序，所以最终结果必须是：

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

各种自定义排序功能，没有运气。任何想法尝试？

Answer 1

ksort($data); 

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

从PHP文件中的注释

另外：

这里是一个函数递归排序多维数组的关键：

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

Answer 2

你可以用在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); 
?>