php arrays in array sum value by specific key?

Question

我有这个数组，我喜欢按新名称和总和对分数进行分组。我有一个输入数组，看起来像:

Array
(
    [0] => Array
        (
            [newname] => Horse
            [score] => 4
        )

    [1] => Array
        (
            [newname] => Horse
            [score] => 2
        )

    [2] => Array
        (
            [newname] => Snake
            [score] => 3
        )

    [3] => Array
        (
            [newname] => Dog
            [score] => 3
        )
)

我需要输出数组来对每个新名字的分数求和。所以这将是结果:

Array
(
    [0] => Array
        (
            [newname] => Horse
            [score] => 6
        )

    [1] => Array
        (
             [newname] => Snake
            [score] => 3
        )

    [2] => Array
        (
             [newname] => Dog
            [score] => 3
        )
)

为此我有以下 php

$newArray = array();
foreach ($arrayAnimals as $row){
    if(!isset($newArray[$row['newname']]['score'])){
        $newArray[$row['newname']]['score'] =0;
    }
    $newArray[$row['newname']]['score'] += $row['score'];
}

但它只显示分数？

Answer 1

你可以这样做

$newArray = array();
foreach ($arrayAnimals as $row){
    $animal = $row['newname'];
    if(!isset($newArray[$animal])){
        $newArray[$animal]['newname'] = $animal;
        $newArray[$animal]['score'] = 0;
    }
    $newArray[$animal]['score'] += $row['score'];
}
print_r(array_values($newArray));