How can i use Transaction with Eloquent Laravel 5.5

Solution:

You can try this way,

        DB::beginTransaction();
        try {
            $project = Project::find($id);
            $project->users()->detach();
            $project->delete();
            DB::commit();
        } catch (\Exception $ex) {
            DB::rollback();
            return response()->json(['error' => $ex->getMessage()], 500);
        }