Php Laravel 5.2使用雄辩的方法获取每行数据的日期差异

我希望在查询数据库的每一行以计算天数时，获取与date today的日期差，并将其设置为引用。如何以生动的方式构建它？谢谢

$query ="SELECT unix_timestamp(NOW()) - unix_timestamp(created_at) AS time_diff from users WHERE trial=1";
$result=mysql_query($query) or die(mysql_error());

while($row=mysql_fetch_assoc($result)) 
{ 
 $diff= $row['time_diff']
}

您可以在中使用selectRaw

或者你想用

DB::table('users')
->selectRaw('unix_timestamp(NOW()) - unix_timestamp(created_at) AS time_diff')
->where('trial',1)
->get();

Model::select(DB::raw('unix_timestamp(NOW()) - unix_timestamp(created_at) AS time_diff'))
->where('trial',1)
->get();