Well, this is my port to Google App Engine for original CodeIgniter. Yes, it worked.
PHP support is thru quercus. It's a php port to java by caucho resin team.
How to run PHP on Google App Engine can refer to this blog: Quercus on the Google App Engine and this one: Run PHP on the Google App Engine.
A standard "guestbook" example from google is ported too. Please visit guestbook to get a look.
Currently, I only did a simple stub to adapt php's filesystem functions that used by CodeIgniter's Cache and log to Google Datastore. And all the database are still using JDO interface that requires to "import" class from java.
The url rewrite is thru urlwrite filter. It's really fast and powerful. :)
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