PHP组按年份和月份从二维数组中的多维数组

Question

这是我从服务器检索的数组：

Array
(
    [0] => Array
        (
            [IdEvent] => 5
            [EventName] => Copy of Opening snow weekend
            [Year] => 2012
            [Month] => 08
        )

    [1] => Array
        (
            [IdEvent] => 7
            [EventName] => Copy of Copy of Opening snow weekend
            [Year] => 2012
            [Month] => 07
        )

    [2] => Array
        (
            [IdEvent] => 1
            [EventName] => Opening snow weekend
            [Year] => 2011
            [Month] => 05
        )

    [3] => Array
        (
            [IdEvent] => 6
            [EventName] => Copy of Opening snow weekend
            [Year] => 2010
            [Month] => 05
        )

)

这是我需要的结果数组

Array
(
    [2012] => Array
        (
            [08] => Array
                  (
                       [IdEvent] => 5
                       [EventName] => Copy of Opening snow weekend
                  )

            [07] => Array
                  (
                       [IdEvent] => 7
                       [EventName] => Copy of Opening snow weekend
                  )
        )

    [2011] => Array
        (
            [05] => Array
                  (
                       [IdEvent] => 1
                       [EventName] => Copy of Opening snow weekend
                  )
        )

    [2010] => Array
        (
            [05] => Array
                  (
                       [IdEvent] => 6
                       [EventName] => Copy of Opening snow weekend
                  )
        )

)

我设法使用以下代码按年份对它们进行分组：

        foreach($query->result_array() as $event){
        if(isset($data[$event['year']])){
            $data[$event['year']][] = $event['event'];
        } else {
            $data[$event['year']] = array($event['event']);
        }
    }

Answer 1

尝试

foreach($query->result_array() as $event){
    if(isset($event['year'])){
        $data[$event['year']][$event['Month']]['IdEvent'] = $event['IdEvent'];
        $data[$event['year']][$event['Month']]['EventName'] = $event['EventName'];
    } else {
        $data[$event['year']] = array($event['event']);
    }
}

甚至你可以试试

if(isset($event['year'])){
    $data[$event['year']][$event['Month']] = array( 'IdEvent' => $event['IdEvent'],
                                                    'EventName' => $event['EventName']);
}