使用foreach循环php在另一个数组中创建数组

已经四个小时了，我在谷歌和软件上到处搜索，但找不到答案。这就是我迄今为止所尝试的。这是到目前为止我的代码

        $tmp_array = array();
        foreach ($cms as $key => $val) {

            $cDate = date('Ym', strtotime($val['day_date']));
            $tmp_ids[] = $val['id'];

            if (array_key_exists($cDate, $tmp_array)) {
                $tmp_array[$cDate]['new_visitors'] += $val['new_visitors'];
                $tmp_array[$cDate]['ids'] = $tmp_ids;
            } else {
                $tmp_array[$cDate]['new_visitors'] = $val['new_visitors'];
                $tmp_array[$cDate]['ids'] = $tmp_ids;
            }

        }

它的产量是这样的,

Array
(
    [202001] => Array
        (
            [new_visitors] => 797
            [ids] => Array
                (
                    [0] => 31
                    [1] => 32
                )

        )

    [202002] => Array
        (
            [new_visitors] => 461
            [ids] => Array
                (
                    [0] => 31
                    [1] => 32
                    [2] => 33
                    [3] => 34
                )

        )

)

Array
(
    [202001] => Array
        (
            [new_visitors] => 797
            [ids] => Array
                (
                    [0] => 31
                    [1] => 32
                )

        )

    [202002] => Array
        (
            [new_visitors] => 461
            [ids] => Array
                (
                    [0] => 33
                    [1] => 34
                )

        )

)

但是我想要这样的结果数组

Array
(
    [202001] => Array
        (
            [new_visitors] => 797
            [ids] => Array
                (
                    [0] => 31
                    [1] => 32
                )

        )

    [202002] => Array
        (
            [new_visitors] => 461
            [ids] => Array
                (
                    [0] => 31
                    [1] => 32
                    [2] => 33
                    [3] => 34
                )

        )

)

Array
(
    [202001] => Array
        (
            [new_visitors] => 797
            [ids] => Array
                (
                    [0] => 31
                    [1] => 32
                )

        )

    [202002] => Array
        (
            [new_visitors] => 461
            [ids] => Array
                (
                    [0] => 33
                    [1] => 34
                )

        )

)

任何建议，我在代码中做什么

ID是表的主键，“新访问者”是访问我的站点的访问者的计数。但到目前为止，我还没有找到任何解决办法

这是我的$cms阵列

Array
(
    [0] => Array
        (
            [id] => 31
            [day_date] => 2020-01-30 00:00:00
            [new_visitors] => 459
        )

    [1] => Array
        (
            [id] => 32
            [day_date] => 2020-01-31 00:00:00
            [new_visitors] => 338
        )

    [2] => Array
        (
            [id] => 33
            [day_date] => 2020-02-01 00:00:00
            [new_visitors] => 242
        )

    [3] => Array
        (
            [id] => 34
            [day_date] => 2020-02-02 00:00:00
            [new_visitors] => 219
        )

)

---

谢谢你，米索鲁德，你的评论奏效了

  $tmp_array = array();
                foreach ($cms as $key => $val) {
                    $cDate = date('Ym', strtotime($val['day_date']));
                    if (array_key_exists($cDate, $tmp_array)) {
                        $tmp_array[$cDate]['new_visitors'] += $val['new_visitors'];
                        $tmp_array[$cDate]['ids'][] = $val['id'];
                    } else {
                        $tmp_array[$cDate]['new_visitors'] = $val['new_visitors'];
                        $tmp_array[$cDate]['ids'][] = $val['id'];
                    }
                }

$arr=[
[id'=>31、'day\u date'=>2020-01-30 00:00:00、'new\u visitors'=>459]，
[id'=>32，'day\u date'=>2020-01-31 00:00:00，'new\u visitors'=>338]，
[id'=>33、'day\u date'=>2020-02-01 00:00:00、'new\u visitors'=>242]，
['id'=>34，'day\u date'=>2020-02-02 00:00:00，'new\u visitors'=>219]
];
回声“；
印刷费（$arr）；
$data=[]；
$add_visitor=0；
$day_date=''；
foreach（$arr作为$arr_值）{
如果（日期（'Ym'，标准时间（$arr_值['day_日期]））！=$day_日期）{
$add_visitor=0；
}
$add_visitor+=$arr_value['new_visitor']；
$data[date（'Ym'，strotime（$arr_value['day_date']）]['new_visitors']=$add_visitor；
$data[date（'Ym'，strotime（$arr_value['day_date']）]['ids'][=$arr_value['id']）；
$day_date=date（'Ym'，strotime（$arr_value['day_date']）；
}
打印（数据）；

您没有在任何地方重置

$tmp\u ID

，因此所有的ID当然都堆积在那里。完全移除

$tmp\u ID

，只需以适当的方式将当前ID添加到数组中：

$tmp\u数组[$cDate]['ID'[=$val['ID']您可以进一步简化代码。查看我的答案更新。费萨尔·汗您有责任检查所有答案，然后在其中选出最佳答案。这样将来的访问者可以从你的帖子中得到帮助。