如何在laravel php中获取最近30天的用户注册数

Question

How to get last 30 days user register count also in those days not register count is 0 with sorting descending order add use Carbon\Carbon; in above. this way you can get a sorted data of last 30 days of user registered

$chartDatas = User::select([
      DB::raw('DATE(created_at) AS date'),
      DB::raw('COUNT(id) AS count'),
    ])
    ->whereBetween('created_at', [Carbon::now()->subDays(30), Carbon::now()])       
    ->groupBy('date')
    ->orderBy('date', 'DESC')
    ->get()
    ->toArray();

$chartDataByDay = array();
foreach($chartDatas as $data) {     
    $chartDataByDay[$data['date']] = $data['count'];
}
$date = new Carbon;
for($i = 0; $i < 30; $i++) {
  $dateString = $date->format('Y-m-d');
  if(!isset($chartDataByDay[ $dateString ])) {
    $chartDataByDay[ $dateString ] = 0;
  }
  $date->subDay();
}
$array = array();
foreach($chartDataByDay as $key => $value){
    $key = date('Y-m-d',strtotime($key));
    $array[$key] = $value;
}
ksort($array);
print_r($array);