PHP

group where conditions in laravel

<?php

$results = DB::table('table')
             ->where(function($query) use ($starttime,$endtime){
                 $query->where('starttime', '<=', $starttime);
                 $query->where('endtime', '>=', $endtime);
             })
             ->orWhere(function($query) use ($otherStarttime,$otherEndtime){
                 $query->where('starttime', '<=', $otherStarttime);
                 $query->where('endtime', '>=', $otherEndtime);
             })
             ->orWhere(function($query) use ($anotherStarttime,$anotherEndtime){
                 $query->where('starttime', '>=', $anotherStarttime);
                 $query->where('endtime', '<=', $anotherEndtime);
             })
             ->get();