数组映射- PHP | array_map替换 - array map - php | array_map replacement

array map - php | array_map replacement

本文关键字：map 替换 array 映射 PHP 数组 | 更新日期: 2023-09-26

我正在寻找替代我的数组的方法。下面的第一个数组:

$arr1 = Array
(
    [0] => stdClass Object
        (
            [values] => Array
                (
                    [0] => stdClass Object
                        (
                            [field_value] => Green
                            [count] => 0
                        )
                    [1] => stdClass Object
                        (
                            [field_value] => Red
                            [count] => 0
                        )
                )
        )
    [1] => stdClass Object
        (
            [values] => Array
                (
                    [0] => stdClass Object
                        (
                            [field_value] => Plastic
                            [count] => 0
                        )
                    [1] => stdClass Object
                        (
                            [field_value] => Metall
                            [count] => 0
                        )
                )
        )

第二个数组:

$arr2 = Array
(
    [0] => 2
    [1] => 6
    [2] => 3
    [3] => 4
)

我想得到这个:

Array
(
    [0] => stdClass Object
        (
            [values] => Array
                (
                    [0] => stdClass Object
                        (
                            [field_value] => Green
                            [count] => 2
                        )
                    [1] => stdClass Object
                        (
                            [field_value] => Red
                            [count] => 6
                        )
                )
        )
    [1] => stdClass Object
        (
            [values] => Array
                (
                    [0] => stdClass Object
                        (
                            [field_value] => Plastic
                            [count] => 3
                        )
                    [1] => stdClass Object
                        (
                            [field_value] => Metall
                            [count] => 4
                        )
                )
        )

我尝试使用array_map函数，但是没有成功。

array_map(function($a,$b){$a = $b; return $a;}, $arr1, $arr2);

谢谢!

$array=$arr[0]->values;
$new_array=array(); 
foreach($array as $key=>$val)
{
    $new_array[$key]=$val;
    $new_array[$key]->count=$arr2[$key];
}

$result=array();
$result[0]->values=$new_array;

根据需要创建自己的函数，并根据自己的喜好进行自定义，参见下面的示例:

function buildMyArray($array1, $array2)
{   
    foreach($array1[0]->values as $key => $value){
        $array1[0]->values[$key]['count'] = $array2[$key];
    }
    return $array1;
}

，你可以这样称呼它:

$result = buildMyArray($arr1, $arr2);

如果您想使用array_map，那么应该像下面这样:

$arr1[0]->values = array_map(function($v, $k) use ($arr2)  {
    // if not found in $arr2, remain the original value.
    $v->count = isset($arr2[$k]) ? $arr2[$k] : $v->count;
    return $v;
}, $arr1[0]->values, array_keys($arr1[0]->values));