问如何仅从laravel中的时间戳中获取时间

EN

$details=DB::table('CourseListNew as cl')       
        ->select(
            'cl.Title',
            'p.Title as ParentTitle', 
            'cd.Trainer', 
            DB::raw('day(cd.StartingDate) as day'),
            DB::raw('day(cd.EndingDate) as day_end'), 
            DB::raw('(cd.StartingDate) as month'), 
            DB::raw('year(cd.StartingDate) as year'),
            DB::raw('time(cd.StartingDate) as start_time'), 
            DB::raw('time(cd.EndingDate) as end_time'), 
           'cd.StartingDate', 
           'cd.EndingDate',
           'cd.Duration',
           'cd.Type',
           'cd.Fee', 
           'cd.Venue',
            'count (s.Id) as TotalRegistartion'
        )
        ->join('CourseListNew as p','p.Id', '=', 'cl.ParentId','left')      
        ->join('CourseDetailsNew as cd','cd.CourseId', '=', 'cl.Id')        
        ->join('Student as s','s.CourseId', '=', 'cl.Id', 'left outer')     
        ->orderBy('cl.Id','DESC')
        ->get();