遍历数组并按索引添加到另一个数组

Question

我有一个如下所示的数组：

array(8) {
  ["rentalPropertyAddress"]=>
  array(15) {
    [0]=>
    string(11) "111 tree st"
    [1]=>
    string(11) "112 tree st"
    [2]=>
    string(11) "122 tree st"
  }
  ["gasInitialized"]=>
  array(15) {
    [0]=>
    string(2) "on"
    [1]=>
    string(2) "on"
    [2]=>
    string(3) "off"
  }
  ["waterInitialized"]=>
  array(15) {
    [0]=>
    string(3) "off"
    [1]=>
    string(2) "on"
    [2]=>
    string(2) "on"
  }
  ["electricInitialized"]=>
  array(15) {
    [0]=>
    string(2) "on"
    [1]=>
    string(2) "on"
    [2]=>
    string(3) "off"
  }
  ["inspectionDate"]=>
  array(15) {
    [0]=>
    string(0) ""
    [1]=>
    string(0) ""
    [2]=>
    string(0) ""
  }
  ["rentalDate"]=>
  array(15) {
    [0]=>
    string(0) ""
    [1]=>
    string(0) ""
    [2]=>
    string(0) ""
  }
  ["vacantInitialized"]=>
  array(15) {
    [0]=>
    string(2) "no"
    [1]=>
    string(2) "no"
    [2]=>
    string(3) "yes"
  }
}

我需要做的是将每个数组的每个索引添加到另一个或多个数组中。例如，预期输出为：

array {
  array {
    [0] => string(11) "111 tree st"
    [1] => string(2) "on"
    [2] => string(3) "off"
    [3] => string(2) "on"
    [4] => string(0) ""
    [5] => string(0) ""
    [6] => string(2) "no"
  }
  ...
}

我已经尝试通过遍历数组并保留它的索引来使用 forloop 来执行此操作：

$i = -1;
$retval = array();
foreach ($_GET as $key => $item) {
    $i += 1;
    $retval[$i] = $item[$i];
}
echo "<pre>";var_dump($retval);

但是输出不是我所期望的：

array(8) {
  [0]=>
  string(11) "111 tree st"
  [1]=>
  string(2) "on"
  [2]=>
  string(2) "on"
  [3]=>
  string(3) "off"
  [4]=>
  string(0) ""
  [5]=>
  string(0) ""
  [6]=>
  string(3) "yes"
  [7]=>
  string(1) "5"
}

如何才能成功地将数组中的数据提取到不同的数组中？

Answer 1

如果我没有误解你需要的输出 那么你可以使用 two foreach() 来迭代每个嵌套数组和按所有嵌套数组的索引位置推送每个元素。

   $_GET = [
         "rentalPropertyAddress"=>["111 tree st","112 tree st","122 tree st"],
         "gasInitialized"=>["on","on","off"],
         "waterInitialized"=>["off","on","on"],
         "electricInitialized"=>["on","on","off"],
         "inspectionDate"=>["","",""],
         "rentalDate"=>["","",""],
         "vacantInitialized"=>["no","no","yes"]
];

$retval = [];
foreach ($_GET as $key => $item) {
    $i=0;
    foreach($item as $k=>$v){
      $retval[$i][] = $v;
      $i++;
    }  
}
echo "<pre>";
print_r($retval);
echo "</pre>";

演示： https://3v4l.org/LrpGo

Answer 2

将列切换为行的一般模式是：

foreach ($a as $row) {
    foreach ($row as $col => $value) {
        $result[$col][] = $value;
    }
}

但是，您可以在超全局中获得此结果，而无需使用 PHP 通过重命名您的表单输入（假设数据来自表单）来自 [=13] =]

<input type="text" name="rentalPropertyAddress[]">
<input type="text" name="rentalPropertyAddress[]">

为这种格式

<input type="text" name="properties[0][rentalPropertyAddress]">
<input type="text" name="properties[1][rentalPropertyAddress]">

即使您使用 JS 动态添加行，这仍然是可能的。

Answer 3

我建议对运行 7.1 到 7.3 的 php 版本执行以下操作（例如，参见演示 link）：

/*The initial array : I chose this one as it is simpler than the one in the question and I find it better for illustration purposes*/
/*Considering the question, we will only get the values ended by 0 (first value of each subarray )*/
$arrays = [['00','01'],['10','11'],['20','11']];

/*Initialisation of the result array*/
$indexes = [];

/*We are going to use the new syntax for list() function introduced in php 7.1  (See the credits link for list() function usage examples )*/

/* We pull the first value (index 0) of each subarray that we store in the result array ($indexes) */

foreach($arrays as $array){ 
    list('0'=>$indexes[]) = $array; 
}

var_dump($indexes); // ['00','10','20']

制作人员：The list function & practical uses of array destructuring in PHP

Demo

Answer 4

如果你穿着袜子，你可能想挂在袜子上。您正在寻找的技术称为 "array transposing"。只要您删除外部关联键，array_map() 和一个 splat 运算符 (...) 将快速准备您的数据。

var_export(array_map(null,...array_values($_GET)));

是的，这确实简单。 Demo

如果您遵循 Don'tPanic 的建议并以 html 形式准备您的数据结构，唯一比这更容易的方法。

输出：

array (
  0 => 
  array (
    0 => '111 tree st',
    1 => 'on',
    2 => 'off',
    3 => 'on',
    4 => '',
    5 => '',
    6 => 'no',
  ),
  1 => 
  array (
    0 => '112 tree st',
    1 => 'on',
    2 => 'on',
    3 => 'on',
    4 => '',
    5 => '',
    6 => 'no',
  ),
  2 => 
  array (
    0 => '122 tree st',
    1 => 'off',
    2 => 'on',
    3 => 'off',
    4 => '',
    5 => '',
    6 => 'yes',
  ),
)

遍历数组并按索引添加到另一个数组

Looping through arrays and adding by index to another array

php

arrays

transpose

rotation

multidimensional-array