根據子索引對多維數組排序

Question

我有一個數組項如下。

Array 
(
    [0] => Array 
     (
      [0] => 2 
      [field_id] => 2 
      [1] => Photometric Interpretation 
      [title] => Photometric Interpretation 
      [2] => text 
      [field_type] => text 
     ) 

    [1] => Array 
     (
      [0] => 3 
      [field_id] => 3 
      [1] => Make 
      [title] => Make 
      [2] => text 
      [field_type] => text 
     ) 

    [2] => Array 
     (
      [0] => 4 
      [field_id] => 4 
      [1] => Model 
      [title] => Model 
      [2] => text 
      [field_type] => text 
     ) 

    [3] => Array 
     (
      [0] => 5 
      [field_id] => 5 
      [1] => Strip Offsets 
      [title] => Strip Offsets 
      [2] => text 
      [field_type] => text 
     ) 

    [4] => Array 
     (
      [0] => 6 
      [field_id] => 6 
      [1] => Samples Per Pixel 
      [title] => Samples Per Pixel 
      [2] => text 
      [field_type] => text 
     ) 

    [5] => Array 
     (
      [0] => 7 
      [field_id] => 7 
      [1] => Rows Per Strip 
      [title] => Rows Per Strip 
      [2] => text 
      [field_type] => text 
     ) 

    [6] => Array 
     (
      [0] => 8 
      [field_id] => 8 
      [1] => Software 
      [title] => Software 
      [2] => text 
      [field_type] => text 
     ) 

    [7] => Array 
     (
      [0] => 9 
      [field_id] => 9 
      [1] => Exposure Time 
      [title] => Exposure Time 
      [2] => text 
      [field_type] => text 
     ) 
) 

我需要根據這個以下數組的價值

Array 
(
    [0] => 7 
    [1] => 3 
    [2] => 4 
    [3] => 5 
    [4] => 2 
    [5] => 6 
) 

或以下字符串

7,3,4,5,2,6 

我曾嘗試使用uksort()和uasort()排序數組排序上述陣列的field_id INDEX。

Answer 1

常用的foreach使得所期望的結果

$index = array_flip([7,3,4,5,2,6]); 
foreach($arr as $item) 
    $res[$index[$item['field_id']]] = $item;