GWT 2.3 + PHP

I wonder if it is possible to connect to the server in PHP, I saw that
the website shows how to make GWT RPC and JSON using Java, but PHP
speaks very little and I'm used to seeing examples to learn things, so
if anyone has an example or tell me where I can find to integrate GWT
with PHP would be grateful.

PS: I found a tool called GWTPHP (http://code.google.com/p/gwtphp/)
making integration using RPC, but from what I noticed the last update
was in 2009, I wonder if anyone knows if the project will continue or
whether the future Google will do something similar.

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