PHP数组查找第一个数组的重复项，并使用键查找第二个数组的和 - php array find duplicates from first array and use the key to find sum the second array

php array find duplicates from first array and use the key to find sum the second array

first Array
(
    [category1] => 2
    [category2] => 3
    [category3] => 1
    [category4] => 3
    [category5] => 1
)
second Array
(
    [q1] => 5
    [q2] => 23
    [q3] => 3
    [q4] => 1
    [q5] => 5
)

使用第一个数组中的重复值对第二个数组中的值求和，然后使用第一个数组的唯一值对其排序的预期结果。有人能给我一些如何实现它的想法吗?

new Array
(
    [1] => 8
    [2] => 5
    [3] => 24
)

试试:

$array1 = [
    'category1' => 2,
    'category2' => 3,
    'category3' => 1,
    'category4' => 3,
    'category5' => 1,
];
$array2 = [
    'q1'        => 5,
    'q2'        => 23,
    'q3'        => 3,
    'q4'        => 1,
    'q5'        => 5,
];
$output = array_fill_keys(array_unique($array1), 0);
array_map(function($a, $b) use (&$output){ $output[$a] += $b; }, $array1, $array2);
sort($output);
var_dump($output);

输出:

array (size=3)
  0 => int 5
  1 => int 8
  2 => int 24