รบกวนช่วยทำให้ปฏิทิน fullcalendar หัวขอ title เป็นสองบรรทัดหน่อยครับ

//new object
$fullcalendar = new Fullcalendar();

//check data for show fullcalendar
if(isset($_GET['get_json'])){
	
	//call method get_fullcalendar
	$get_calendar = $fullcalendar->get_fullcalendar();

	foreach($get_calendar as $calendar){
		
		$json[] = array(
			'id_booking'=>$calendar['id_booking'],
			'title'=>$calendar['tb_time_start'].'-'.$calendar['tb_time_end'].'ห้อง'.' '.$calendar['room_name'],
			'start'=>$calendar['tb_date'].'T'.$calendar['tb_time_start'],
			'end'=>$calendar['tb_date'].'T'.$calendar['tb_time_end'],
			'url'=>'javascript:get_modal('.$calendar['id_booking'].');',
		);
	}
	
	//return JSON object
	echo json_encode($json);
}