get current date in laravel query builder code example

Example 1: laravel where creation is today carbon

$posts = Post::whereDate('created_at', Carbon::today())->get();

Example 2: where('created_at', '=', date('Y-m-d'));

$q->whereDay('created_at', '=', date('d'));
$q->whereMonth('created_at', '=', date('m'));
$q->whereYear('created_at', '=', date('Y'));