Question

我希望我不是在这里重新发布或者是多余的，还在浏览php数组。我有一个多维数组，如下所示：

Array
(
[0] => stdClass Object
    (
        [field_name] => step_one
        [field_value] => A Message
    )

[1] => stdClass Object
    (
        [field_name] => message_color
        [field_value] => 
    )

[2] => stdClass Object
    (
        [field_name] => Submitted Login
        [field_value] => admin
    )

[3] => stdClass Object
    (
        [field_name] => Submitted From
        [field_value] => 127.0.0.1
    )

[4] => stdClass Object
    (
        [field_name] => step_one
        [field_value] => Another Message
    )

[5] => stdClass Object
    (
        [field_name] => message_color
        [field_value] => orange
    )

[6] => stdClass Object
    (
        [field_name] => Submitted Login
        [field_value] => admin
    )

[7] => stdClass Object
    (
        [field_name] => Submitted From
        [field_value] => 127.0.0.1
    )

[8] => stdClass Object
    (
        [field_name] => step_one
        [field_value] => some Other Idea
    )

[9] => stdClass Object
    (
        [field_name] => message_color
        [field_value] => pink
    )

[10] => stdClass Object
    (
        [field_name] => Submitted Login
        [field_value] => admin
    )

[11] => stdClass Object
    (
        [field_name] => Submitted From
        [field_value] => 127.0.0.1
    )

）我希望它读起来像这样：

 Array( 
  Array [0] (
      [step_one] => Message
      [message_color] => 
      )
   Array [1] (
      [step_one] => Another Message
      [message_color] => orange

   )
   Array [2] (
      [step_one] => some other idea
      [message_color] => pink
   )

但我不知道如何在php中实现目标。我已经尝试过array_merge（）和array_combine（），但我只是没有到达任何地方。任何帮助将不胜感激！

Answer 1

这是一个简单的循环。

foreach($obj_array as $obj){
    $a_array[$obj->field_name]=$obj->field_value;
}

Answer 2

Tim Withers解决方案或......

function gather($arr){
  return array($arr->field_name=>$arr->field_value);
}

$newArr = array_map('gather',$oldArr);

oldArr是原作！

Answer 3

$reduce = function($input)
{
    $current = 0;
    return array_reduce($input, function($a, $b) use (&$current) {
        isset($a[$current][$b->field_name]) && $current++;
        $a[$current][$b->field_name] = $b->field_value;
        return $a;
    }, array());
};

print_r($reduce($input));

输出（我有一个较小的数据集）：

Array
(
    [0] => Array
        (
            [step_one] => A Message
            [message_color] => 
        )

    [1] => Array
        (
            [step_one] => Another Message
        )

)

如果在当前索引（$current）中密钥已经存在，则调整是启动一个新元素。

如何将多维数组转换为关联数组

3 个答案: