I developed a calendar on my intranet using PHP, it exports a "*.ics" file that can be imported to iCal and Google calendar. But the project sponsor requires that the calendar auto sync with iCal/Google cal, I'm not sure if it's possible, or how to do it. Can anyone point me to the right direction? Thanks!
You can export google calendar content into a special XML file through a public URL. All you have to do is to periodically synchronize your calendar data with the online data.
Check this url:
Exporting google calendar
Alternatively you could check out other, already working implementations.
Here is a nice tutorial:
Goole Celendar API Guide for PHP
Also, have a look at this question:
Another Stackoverflow question in the topic
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