PHP

How to add a additional condition in a join using query builder laravel 5.3?

->leftJoin('table3 AS c', function($join){
        $join->on('a.field2', '=', 'c.field2')
        ->where('a.field2', '=', true)
        ->where('a.field3', '=', 'c.field3');
})

Laravel - Query Builder Left join

 $result = DB::table('pos_cash_register_open')
            ->select('pos_cash_register_open.outlet_id','pos_outlets.*')
            ->leftjoin('pos_outlets', 'pos_cash_register_open.outlet_id', '=', 'pos_outlets.id')
            ->groupBy('pos_cash_register_open.outlet_id')
            ->get();