php多維數組排序問題

我有一個複雜的多維數組。結構是這樣的php多維數組排序問題

Array 
(
    [0] => Array 
     (
      [countries] => Array 
       (
        [0] => Array 
         (
          [country_code] => US        
          [growth] => 3.57 
         ) 

        [1] => Array 
         (
          [country_code] => CA        
          [growth] => 4.77 
         ) 

        [2] => Array 
         (
          [country_code] => TT        
          [growth] => 0 
         ) 
       ) 
      [group_name] => North America 
     ) 

    [1] => Array 
     (
      [countries] => Array 
       (
        [0] => Array 
         (
          [country_code] => BR       
          [growth] => 2.19 
         ) 

        [1] => Array 
         (
          [country_code] => PE       
          [growth] => 1.78 
         ) 

        [2] => Array 
         (
          [country_code] => UY       
          [growth] => 8.83 
         ) 

        [3] => Array 
         (
          [country_code] => MX       
          [growth] => 3.83 
         ) 
       ) 
      [group_name] => South America 
     ) 
)

我想對它們進行排序（可以是通過使用array_multisort），以便它們按照growth（由高到低）排序

使數組排序將是

Array 
(
    [0] => Array 
     (
      [countries] => Array 
       (
        [0] => Array 
         (
          [country_code] => CA        
          [growth] => 4.77 
         ) 
        [1] => Array 
         (
          [country_code] => US        
          [growth] => 3.57 
         )     
        [2] => Array 
         (
          [country_code] => TT        
          [growth] => 0 
         ) 
       ) 
      [group_name] => North America 
     ) 

    [1] => Array 
     (
      [countries] => Array 
       (
        [0] => Array 
         (
          [country_code] => UY       
          [growth] => 8.83 
         ) 

        [1] => Array 
         (
          [country_code] => MX       
          [growth] => 3.83 
         ) 
        [2] => Array 
         (
          [country_code] => BR       
          [growth] => 2.19 
         ) 

        [3] => Array 
         (
          [country_code] => PE       
          [growth] => 1.78 
         ) 
       ) 
      [group_name] => South America 
     ) 
)

我是新來的PHP，所以我想不出如何排序這個複雜的數組。我知道如何對簡單的多維數組進行排序，如http://in2.php.net/manual/en/function.array-multisort.php

來源

2012-07-17 Anuj Jain

什麼問題？ – Lion 2012-07-17 15:00:09

我想排序一個複雜的數組，我不知道該怎麼做。我已閱讀手冊，但無法爲這樣一個複雜的數組獲得一個好例子。 – 2012-07-17 15:05:59

請顯示您的代碼 – 2012-07-17 15:44:44

最糟糕的情況是，您使自己的排序功能和使用usort。
它實際上是爲這些事情設計的。

對您而言，您將通過$arr[$i]['countries']並根據$arr['growth']進行比較功能排序。

來源

2012-07-17 15:40:18

我用我下面的排序功能好幾年了：

來源

2012-07-17 15:48:48 feeela

php多維數組排序問題

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