php - Sync multiple iCalendars (Airbnb, Flipkey, Google Calendar, etc) -

i'm developing website apartments rental. i'm using wordpress hotel theme tweaked instead of "rooms" uses "flats" , booking plug-in. each of flats advertised in airbnb , flipkey.

what need able sync calendars if, instance, books flat in airbnb, flat automatically marked "non available" in both website , flipkey. done using feeds .ics provided both companies. there output feed , input feed both, if paste output in input of other , vice versa, thing works perfectly.

now, need way of centralizing both calendar in 1 system , using system feed inputs of airbnb, flipkey , own booking plugin of wordpress. i've tried with:

php icalendar (it can, google calendar, feeds, doesn't -as far know- provide unified output). services http://www.accommodationcalendar.com input, no output either.

maybe http://www.davical.org/ option, i'm using shared hosting, can't install (as far know) -the reason being shared hosting has mysql , not postgresql.

does have idea of how solve this?

thank you!

after research, found solution:

1) use library: http://kigkonsult.se/icalcreator/

2) ics feeds , merge them , create new ics (create both "import" , "export" folders , give them writing permissions).

require_once('../classes/icalcreator/icalcreator.class.php');  $config2 = array("unique_id" => "kigkonsult2.se",      "directory" => "import", ); $vcalendar2 = new vcalendar($config2);  $vcalendar2->setconfig("url" , "https://someweb/cal.ics");  $vcalendar2->parse();  $vcalendar2->setconfig("url" , "https://anotherurl/cal2.ics"); $vcalendar2->parse();  $vcalendar2->setconfig("directory", "export"); $vcalendar2->setconfig("filename", "icalmerge3.ics"); $vcalendar2->savecalendar();   echo "done"; 

3) create cron scheduler run file recurrently. point both airbnb , flipkey url feed created. can use many input ics files want.