将索引数组转换为键匹配的单独数组

Question

我觉得我的问题很简单，但我就是想不出来解决方法。

我需要将这个多维数组转换为:

[additionallocations] => Array
        (
            [Address] => Array
                (
                    [0] => Address1
                    [1] => Address2
                )

            [City] => Array
                (
                    [0] => City1
                    [1] => City2
                )

            [State] => Array
                (
                    [0] => AK
                    [1] => DC
                )

            [Zip] => Array
                (
                    [0] => 234423
                    [1] => 32423
                )

            [Country] => Array
                (
                    [0] => US
                    [1] => US
                )

        )

转换成这样：

[additionallocations0] => Array
        (
           [Address] => Address1
           [City] => City1
           [State] => AK
           [Zip] => 234423
           [Country] => US
        )
[additionallocations1] => Array 
        (
           [Address] => Address2
           [City] => City2
           [State] => DC
           [Zip] => 32423
           [Country] => US
         )

我尝试使用foreach循环，但是无法获得预期的结果：

$count = 0;
        foreach($_POST['additionallocations'] as $value => $key) {
            foreach($key as $row) {
                $additional['additional'.$count] = array($value => $row);
            }
            $count++;
        }

这里有一个phpfiddle，我需要将$locationsBAD数组转换为类似$locationsGOOD数组的形式。

- user3238125

Answer 1

您可以尝试以下方法：

foreach($_POST['additionallocations'] as $key => $values) {
  foreach ($values as $count => $value) {
    $name = 'additionallocations' . $count;
    if (!isset($output[$name]) {
      $output[$name] = array();
    }
    $output[$name][$key] = $value;
  }
}

- hsz

---

你的解决方案更好，因为它避免了计算“qty”。你在if语句中只是错过了一个右括号，顺便说一下，这不是必需的。 - Mat M

Answer 2

Ofir遗漏了位置计数在参数中的值。

以下是我提供的解决方案：

<?php
// we need to know how many locations beforehand
$qty = count($additionallocations["Address"]);

for ($l=0; $l<$qty; $l++)
{
    foreach($additionallocations as $param => $values)
    {
        $new_locations['location'.$l][$param] = $values[$l];
    }
}
print_r($new_locations);
?>

我得到了：

Array
(
    [location0] => Array
        (
            [Address] => Address1
            [City] => City1
            [State] => AK
            [Zip] => 234423
            [Country] => US
        )

    [location1] => Array
        (
            [Address] => Address2
            [City] => City2
            [State] => DC
            [Zip] => 32423
            [Country] => US
        )

)

- Mat M

Answer 3

您把循环嵌套的顺序搞混了。应该按照以下方式进行：

1. 循环嵌套数组中的值
2. 循环遍历第一层数组中的键。

因此，代码应该像这样：

$locations = array(
    'Address' => array('Address1', 'Address2'),
    'City' => array('City1', 'City2'),
    'State' => array('AK', 'DC'),
    'Zip' => array('234423', '32423'),
    'Country' => array('US', 'US'),
);

$result = array();
for ($i = 0;; $i++)
{
    $b_more = false;
    $arr = array();
    foreach ($locations as $key => $loc)
    {
        $arr[$key] = $i < count($loc) ? $loc[$i] : 0;
        if ($i < count($loc) - 1)
            $b_more = true;
    }
    $result['additionallocations' . $i] = $arr;
    if (!$b_more)
        break;
}
print_r($result);

- hindmost

Answer 4

看起来我来晚了，但这也可以运行： https://eval.in/99929

   foreach($additionallocations as $key=>$ary) {
       foreach($ary as $i=>$data) {
           ${location.$i}[$key] = $data;
       }
   }

这实际上给你单独的数组 $location0、$location1 等，这是我理解你想要的。

- Digital Chris