删除两个嵌套多维数组的重复值

Question

我正在努力array_diff解决我的问题的功能和另一种解决方案，但没有任何东西给我想要的效果..

我有两个从数据库返回的多维数组（嵌套深度未知）并将编码和解码为 JSON。

数组如下所示：

Array ( 

    [0] => Array ( [id] => 1 [lft] => 1  [rgt] => 2  ) 

    [1] => Array ( [id] => 2 [lft] => 3  [rgt] => 4  )

    [2] => Array ( [id] => 3 [lft] => 5  [rgt] => 6  )

    [3] => Array ( [id] => 4 [lft] => 7  [rgt] => 16 )

    [4] => Array ( [id] => 5 [lft] => 8  [rgt] => 9  )

    [5] => Array ( [id] => 6 [lft] => 10 [rgt] => 11 )

    [6] => Array ( [id] => 7 [lft] => 12 [rgt] => 15 )

    [7] => Array ( [id] => 8 [lft] => 13 [rgt] => 14 )

    [8] => Array ( [id] => 9 [lft] => 17 [rgt] => 18 )

)

Array ( 

    [0] => Array ( [id] => 17 [lft] => 1 [rgt] => 2  ) 

    [1] => Array ( [id] => 3  [lft] => 3 [rgt] => 10 )

    [2] => Array ( [id] => 9  [lft] => 4 [rgt] => 9  )

    [3] => Array ( [id] => 24 [lft] => 5 [rgt] => 6  )

    [4] => Array ( [id] => 81 [lft] => 7 [rgt] => 8  )

)

现在我想合并这两个数组，以便我得到第一个数组，没有与第二个数组中的元素具有相同 id 的元素。结果应该是这样的：

Array ( 

    [0] => Array ( [id] => 1 [lft] => 1  [rgt] => 2  ) 

    [1] => Array ( [id] => 2 [lft] => 3  [rgt] => 4  )

    [3] => Array ( [id] => 4 [lft] => 7  [rgt] => 16 )

    [4] => Array ( [id] => 5 [lft] => 8  [rgt] => 9  )

    [5] => Array ( [id] => 6 [lft] => 10 [rgt] => 11 )

    [6] => Array ( [id] => 7 [lft] => 12 [rgt] => 15 )

    [7] => Array ( [id] => 8 [lft] => 13 [rgt] => 14 )

)

例如，我尝试过使用这个修改过的函数使用其他解决方案，但似乎没有任何效果。有谁能够帮助我？

Answer 1

你是对的，你需要array_udiff。尝试这个：$res = array_udiff($array1, $array2, function ($a, $b) {&nbsp; &nbsp; if ($a['id'] < $b['id']) {&nbsp; &nbsp; &nbsp; &nbsp; return -1;&nbsp; &nbsp; } elseif ($a['id'] > $b['id']) {&nbsp; &nbsp; &nbsp; &nbsp; return 1;&nbsp; &nbsp; } else {&nbsp; &nbsp; &nbsp; &nbsp; return 0;&nbsp; &nbsp; }});