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php - 如何对 PHP 数组进行 GROUP BY 和 SUM?

转载 作者:行者123 更新时间:2023-12-05 08:21:14 25 4
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如何根据 evaluation_category_id 对这个数组进行分组和求和

Array
(
[0] => Array
(
[id] => 60
[evaluation_category_id] => 3
[score] => 15
[itemMaxPoint] => 20
)
[1] => Array
(
[id] => 61
[evaluation_category_id] => 2
[score] => 10
[itemMaxPoint] => 20
)

[2] => Array
(
[id] => 62
[evaluation_category_id] => 1
[score] => 5
[itemMaxPoint] => 20
)

[3] => Array
(
[id] => 63
[evaluation_category_id] => 1
[score] => 50
[itemMaxPoint] => 200
)

[4] => Array
(
[id] => 64
[evaluation_category_id] => 2
[score] => 150
[itemMaxPoint] => 200
)

[5] => Array
(
[id] => 65
[evaluation_category_id] => 3
[score] => 30
[itemMaxPoint] => 50
)
.
.
.
)

所以我得到这样的数组

 Array
(
[0] => Array
(

[evaluation_category_id] => 3
[score] => 45
[itemMaxPoint] => 70
)

[1] => Array
(
[evaluation_category_id] => 2
[score] => 160
[itemMaxPoint] => 220
)

[2] => Array
(
[evaluation_category_id] => 1
[score] => 55
[itemMaxPoint] => 220
)
}

我已经试过了,但它不起作用。请纠正我哪里做错了

 public function test($data) {
$groups = array();
foreach ($data as $item) {
$key = $item['evaluation_category_id'];
if (!isset($groups[$key])) {
$groups[$key] = array(
'id' => $key,
'score' => $item['score'],
'itemMaxPoint' => $item['itemMaxPoint'],
);
} else {
$groups[$key]['score'] = $groups[$key]['score'] + $item['score'];
$groups[$key]['itemMaxPoint'] = $groups[$key]['itemMaxPoint'] +$item['itemMaxPoint'];
}
}
return $groups;
}

输出是

Array
(
[2] => Array
(
[id] => 2
[score] => 121 //121 because the given array is different.but its actually SUM all values of score
[itemMaxPoint] => 300
)

)

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