按值排序多維數組並保存

Question

如何根據「季節」字段的值，然後是「系列」字段的值來排序此數組？並保存鍵

 Array 
     (
      [2] => Array 
       (
        [0] => Array 
         (
          [season] => 2 
          [series] => 3 
          [title] => Boom 
         ) 

        [1] => Array 
         (
          [season] => 2 
          [series] => 1 
          [title] => Boom 
         ) 

        [2] => Array 
         (
          [season] => 2 
          [series] => 2 
          [title] => Boom 
         ) 

       ) 

      [1] => Array 
       (
        [0] => Array 
         (
          [season] => 1 
          [series] => 1 
          [title] => Boom 
         ) 

        [1] => Array 
         (
          [season] => 1 
          [series] => 3 
          [title] => Boom 
         ) 

        [2] => Array 
         (
          [season] => 1 
          [series] => 2 
          [title] => Boom 
         ) 

       ) 
     ) 
    ) 

usort，ksort功能不保存密鑰，而是由季節和一系列價值觀真的好

usort功能後整理：

 Array 
     (
      [0] => Array 
       (
        [0] => Array 
         (
          [season] => 1 
          [series] => 1 
          [title] => Boom 
         ) 

        [1] => Array 
         (
          [season] => 1 
          [series] => 2 
          [title] => Boom 
         ) 

        [2] => Array 
         (
          [season] => 1 
          [series] => 3 
          [title] => Boom 
         ) 

       ) 

      [1] => Array 
       (
        [0] => Array 
         (
          [season] => 2 
          [series] => 1 
          [title] => Boom 
         ) 

        [1] => Array 
         (
          [season] => 2 
          [series] => 2 
          [title] => Boom 
         ) 

        [2] => Array 
         (
          [season] => 2 
          [series] => 3 
          [title] => Boom 
         ) 

       ) 
     ) 

誰能幫我解決這個問題？

Answer 1

解決了array_walk

array_walk($arr, function($a, $b){ 
     return $a['season'] - $b['season']; 
    });