Question

我只是想知道如何从另一个数组创建一个数组。我有这个多维数组。

Array(
    [0] => Array(
            [c] => Array(
                    [0] => Array(
                            [v] => Commercial
                        )    
                    [1] => Array(
                            [v] => 2
                        )    
                )    
        )

    [1] => Array(
            [c] => Array(
                    [0] => Array(
                            [v] => Infrastructure
                        )    
                    [1] => Array(
                            [v] => 47
                        )    
                )    
        )

    [2] => Array(
            [c] => Array(
                    [0] => Array(
                            [v] => Tourist & Recreational
                        )    
                    [1] => Array(
                            [v] => 3
                        )    
                )    
        ) 
)

我想从上面的数组中动态创建以下数组。

Array
(
    [Commercial] => 2
    [Infrastructure] => 47
    [Tourist & Recreational] =3 
)

感谢任何帮助。

Answer 1

假设您的上述数组位于$ array中。所以，

$new_arr = array();
foreach($array as $val){
  if(isset($val['c'][0]['v']) && isset($val['c'][1]['v'])){
     $new_arr[$val['c'][0]['v']] = $val['c'][1]['v'];
  }
}
print_r($new_arr);

Answer 2

在这种情况下，array_walk_recursive（）函数是你的答案，这个解决方案有点脏，但是一般函数只能在Leaf节点上运行，所以它绝对是要走的路：

<?php


$arr = [
    0 => [
            'c' => [
                    0 => [
                            'v' => 'Commercial'
                        ]    ,
                    1 => [
                            'v' => 2
                        ]    ,
                ]    
        ],

    1 => [
            'c' => [
                    0 => [
                            'v' => 'Infrastructure'
                        ]    ,
                    1 => [
                            'v' => 47
                        ]    ,
                ]    
        ],

    2 => [
            'c' => [
                    0 => [
                            'v' => 'Tourist & Recreational'
                        ]    ,
                    1 => [
                            'v' => 3
                        ]    ,
                ]    
        ] 
];
global $array_clean;
function pluck_leaves( $item, $key ) {
    global $array_clean;
    if ( is_numeric( $item ) ) {
        if ( isset( $array_clean['temp_key'] ) ) {
            $array_clean[$item] = $array_clean['temp_key'];
            unset( $array_clean['temp_key'] );
        } else {
            $array_clean[$item] = null;
        }
    } else {
        $last_key = key(end($array_clean));

        reset( $array_clean );
        if ($array_clean[ $last_key ] !== null) {
            $array_clean[ $last_key ] = $item;
        } else {
            $array_clean['temp_key'] = $item;
        }

    }
}
array_walk_recursive($arr, 'pluck_leaves' );

var_dump($array_clean);
?>

从另一个数组创建PHP关联数组

2 个答案: