array_map 2d数组到1d关联数组

问题描述

我有一个二维数组（从PDO MySQL DB返回），其格式为

I have a 2d Array (returned from PDO MySQL DB) that is of the form

{
  [0] => {
    "ID" => 1,
    "Name" => "Name1"
  },
  [1] => {
    "ID" => 2,
    "Name" => "Name2"
  },
 [2] => {
    "ID" => 3,
    "Name" => "Name3"
  }
}

是否有一种优雅/有效的解决方案将其转换为

Is there an elegant/efficient solution to transform it to

{
  [1] => "Name1",
  [2] => "Name2",
  [3] => "Name3"
}

我知道我可以遍历并以这种方式创建数组，但是我觉得这可能不如花哨的array_map效率高。

I know I could loop through and create the array that way, but i feel like that may be less efficient than something like a fancy array_map.

基本上我想要的东西...

Basically I want something like...

array_map(
  function ($value) {
    return $value['ID']=>$value['Name'];
  }, $ResultArray);

推荐答案

如果您使用的是PHP5.5，则可以使用 array_column 函数-

If you are using PHP5.5 then you can use the array_column function - documentation

$names = array_column($records, 'Name', 'ID');

否则， array_map 解决方案可能是

$names = array_combine(array_map(function($value) {
     return $value['ID'];
}, $records), array_map(function($value) {
     return $value['Name'];
}, $records));

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