二维关联数组中相似元素的总和-PHP

我有一个如下的数组

Array (
        [0]=> Array
                (
                   [employee_num]  =>1009
                   [employee_name] =>Jane Doe
                   [amount]        =>4500.00
                )
        [1]=> Array
                (
                   [employee_num]  =>1009
                   [employee_name] =>Jane Doe
                   [amount]        =>2500.00
                )
        [2]=> Array
                (
                   [employee_num]  =>1033
                   [employee_name] =>Test User
                   [amount]        =>3455.50
                )
        [3]=> Array
                (
                   [employee_num]  =>1009
                   [employee_name] =>Jane Doe
                   [amount]        =>5500.00
                )
        [4]=> Array
                (
                   [employee_num]  =>1033
                   [employee_name] =>Test User
                   [amount]        =>7500.00
                )
     )

我想要得到的是如下所示的数组： （每个用户有一个条目，其金额值之和为我知道我必须为每个用户使用一个条目，但我无法真正理解如何合并[employee_num]和[employee_name]条目。我事先不知道数组中类似条目的数量或它们的索引

Array (
        [0]=> Array
                (
                   [employee_num]  =>1009
                   [employee_name] =>Jane Doe
                   [amount]        =>12500.00
                )
        [1]=> Array
                (
                   [employee_num]  =>1033
                   [employee_name] =>Test User
                   [amount]        =>10955.50
                )
      )

---

我该怎么做？有人能帮忙吗？谢谢。

假设$array是原始数组：

$outputArray = array();
foreach ($array as $employeeArray) {
    $outputArray[$employeeArray['employee_name']]['employee_num'] = $employeeArray['employee_num'];
    $outputArray[$employeeArray['employee_name']]['employee_name'] = $employeeArray['employee_name'];
    $outputArray[$employeeArray['employee_name']]['amount'] += $employeeArray['amount'];
}
print_r($outputArray);

---

$outputArray

的键将是员工的姓名。如果您想按员工人数进行匹配，只需使用

$outputArray[$employeeArray['employeenum']]]

而不是

$outputArray[$employeeArray['employeename']]

即可。谢谢：）我想获取每个用户的金额总和，但您的代码只获取每个用户的最后一个金额项目。@Thiliniw哦，我对我的解决方案进行了编辑。查看行

$outputArray[$employeeArray['employee_name']['amount']+=$employeeArray['amount']。我用了
+=
而不是
=
。
function sumAmount($data)
{
    $rst=array();
    foreach($data as $info)
    {
        if(!isset($rst[$info["employee_num"]]))
            $rst[$info["employee_num"]]=$info;
        else
            $rst[$info["employee_num"]]["amount"]+=$info["amount"];
    }
    return array_values($rst);
}