下面是一个由子数组组成的单个数组。每个子项都是数据库上的结果集对于特定事件，并且使用CCD_ 1字段将它们分组。我想为客户求积分，然后完成后，遍历数组并添加一个新元素称为CCD_ 2。基于[customer_id]的匹配数组会将它们的积分相加，然后添加到包含该客户id的每个数组中。我不确定这是否可以一次完成所有操作，或者我是否必须在积分相加后再次遍历该数组，为客户添加total_points字段。
结构：
[0] => Array
(
[0] => Array
(
[customer_id] => 962
[event_id] => 1
[score] => 356
[point] => 1
)
[1] => Array
(
[customer_id] => 962
[event_id] => 1
[score] => 356
[point] => 1
)
)
[1] => Array
(
[0] => Array
(
[customer_id] => 962
[event_id] => 2
[score] => 356
[point] => 1
)
[1] => Array
(
[customer_id] => 962
[event_id] => 2
[score] => 356
[point] => 1
)
}
[2] => Array
(
[0] => Array
(
[customer_id] => 962
[event_id] => 3
[score] => 356
[point] => 1
)
[1] => Array
(
[customer_id] => 962
[event_id] => 3
[score] => 356
[point] => 1
)
}
您将需要几个嵌套的foreach循环和一个临时数组：
$temp=array();
foreach($data as $element)
foreach($element as $child)
$temp[$child['customer_id']] = isset($temp[$child['customer_id']])?$temp[$child['customer_id']]+$child['score']:$child['score'];
foreach($data as &$element)
foreach($element as &$child)
$child['total']=$temp[$child['customer_id']];
现场示例：http://codepad.viper-7.com/HkNF67
注意这是基于你想要总分，如果你想总分，你可以用$child['score']代替$child['point']
您需要两个步骤：首先遍历数组并计算每个customer_id的总点数。然后再次浏览并将total_point连接到每个客户：
// Step 1
function reduce_points_total($carry, $item) {
if (is_array($item)) {
if (isset($item['customer_id']) && isset($item['point'])) {
if (!isset($carry[$item['customer_id']])) $carry[$item['customer_id']] = 0;
$carry[$item['customer_id']] += $item['point'];
} else {
$carry = array_reduce($item, reduce_points_total, $carry);
}
}
return $carry;
}
$points_total = array_reduce($array, reduce_points_total, array());
// Step 2
function insert_points_total(&$item, $key, $points_total) {
if (is_array($item)) {
if (isset($item['customer_id']) && isset($points_total[$item['customer_id']])) {
$item['points_total'] = $points_total[$item['customer_id']];
} else {
array_walk($item, insert_points_total, $points_total);
}
}
}
array_walk($array, insert_points_total, $points_total);
步骤1中的递归CCD_ 8计算CCD_。它生成一个数组：
Array
(
[962] => 4
[963] => 3
)
步骤2中的递归CCD_ 10将这些数字插入到主CCD_。
在这里，您可以找到一个正在运行的演示：https://eval.in/200799