添加特定月份的记录

add records from a particular month

我需要添加 7 月份的记录。

我的代码:现在只能添加当月的记录

$cobrosm = Cobros::whereBetween('created_at',[
            $carbon->startOfMonth()->toDateString(),
            $carbon->endOfMonth()->toDateString()
       ])->sum('importe');

尝试使用此代码:

$julyDate = date('Y-07-d');
$cobrosm = Cobros::whereBetween('created_at',[
        Carbon::createFromFormat('Y-m-d', $julyDate)
            ->firstOfMonth()
            ->toDateString(),
        Carbon::createFromFormat('Y-m-d', $julyDate)
            ->lastOfMonth()
            ->toDateString()
    ])->sum('importe');

有关 Carbon 的更多信息 https://carbon.nesbot.com/docs/