error

else if(Input::get('emp_print')){
            PDF::SetTitle('Employee ID');
            PDF::SetFont('dejavusans', '', 10);
            PDF::SetMargins(15, 15, 0, true);
            //PDF::AddPage('L');
            //TCPDF::setEqualColumns(3,0,'');
            PDF::AddPage();
            $id = Input::get('Emp_id');

            $info = PatientInfo::where('id',$id)->first();
           
            PDF::writeHTML(view('webpage.printEmp',compact('info'))->render());
            ob_end_clean();
            PDF::Output('Employee_ID.pdf','I');
        }
        else if(Input::get('printMultipleEmp')){
            PDF::SetTitle('Employee ID');
            PDF::SetFont('dejavusans', '', 10);
            PDF::SetMargins(5, 10, 5, true);
            PDF::setEqualColumns(1,0,'');
            PDF::AddPage();

            $row = count(Input::get('info_Empid'));
            $infos = [];
            for($i=0;$i<$row;$i++){
                $infos[] = PatientInfo::where('id',Input::get('info_Empid')[$i])->first();
            }

            PDF::writeHTML(view('webpage.printMulEmp',compact('p_exam_student','info','row','infos'))->render());
            ob_end_clean();
            PDF::Output('Employee_ID.pdf','I');
        }