We run a web portal for the Freeport Zones of Clark Philippines and Subic Bay Philippines found at the following URL: http://www.clarksubicmarketing.com. In it we feature several hotels that we wish to do online booking for. If anyone has experience with a good PHP online booking system that can handle multiple hotels, We'd be very happy to hear of your experiences or suggestions.
Have you heard of LuxuryRes? This might help and remains a very quality company for hotel booking engines and related technology: http://www.luxuryres.com/ Best and Take Care!
You can use Joomla HBS for any kind of hotel booking solutions. visit http://joomlahbs.com for more information.