将对象添加到子数组

我需要按日期对数组进行分组但不起作用。无法将对象推入子数组。下面是我尝试过的代码。

$getData = array
(
    0 => array
    (
        'date' => '2017-08-22',
        'msg' => '1231',
    ),
    1 => array
    (
        'date' => '2017-08-21',
        'msg' => '1172',
    ),
    2 => array
    (
        'date' => '2017-08-20',
        'msg' => '1125'
    ),
    3 => array
    (
        'date' => '2017-08-21',
        'msg' => '251'
    ),
    4 => array
    (
        'date' => '2017-08-20',
        'msg' => '21773',
    ),
    5 => array
    (
        'date' => '2017-08-22',
        'msg' => '3750'
    )
);
$smsArr = [];
foreach ($getData as $xyz => $groupData) {
    $isFound = FALSE;
    $abc['date'] = $groupData['date'];
    $abc['data'] = [(object)["msg" => $groupData['msg']]];
    foreach ($smsArr as $key => $value) {
        if ($value['date'] == $groupData['date']) {
            array_push($value['data'], (object)["msg" => $groupData['msg']]); // nothing happens to final array
            $isFound = TRUE;
        }
    }
    if ($isFound == FALSE) {
        array_push($smsArr, $abc);
    }


}
print_r($smsArr);

试图按日期对 json 进行分组。但是当试图将元素推送到子数组时没有任何反应。

我应该得到最终结果

Array
(
    [0] => Array
    (
        [date] => 2017 - 08 - 21
        [data] => Array
        (
            [0] => stdClass Object
            (
                [msg] => 1172
            )
            [1] => stdClass Object
            (
                [msg] => 251
            )
        )
    )

    [1] => Array
    (
        [date] => 2017 - 08 - 20
        [data] => Array
        (
            [0] => stdClass Object
            (
                [msg] => 1125
            )
            [1] => stdClass Object
            (
                [msg] => 21773
            )
        )
    )
    
    [2] => Array
    (
        [date] => 2017 - 08 - 21
        [data] => Array
        (
            [0] => stdClass Object
            (
                [msg] => 3750
            )
            [1] => stdClass Object
            (
                [msg] => 1231
            )
        )
    )
)

当我尝试 push array_push($value['data'],(object)["msg"=>$groupData['msg']]);

它不会反映在最终数组上。