Cocoon, JSON, PHP

[Maurizio P.]

Hello ppl, kind regards to you all, beg ur pardon for my bad english.

My goal: having Cocoon (in tomcat's webapps) "talking" with PHP (in apache2 httpd) both living on same machine or same subnet.
The "talking" should also permit JSON syntax from browser to PHP page, passing through Cocoon.

Let's say that the user won't ever know that in a portion of the page that he is looking there is cocoon that is asking to php what to output, by a POST form or by a JSON call, both through cocoon.
Let's also assume that we don't care "why" we need to do this (hey it's not my crazy idea, i was asked to... ).

I have played successfully with sitemap's mapping to http url of apache servers where PHP pages are living:
 <map:match pattern="php-info">
     <map:read src="" href="http://default.local/info.php"> http://default.local/info.php"/>
 </map:match>

Btw, I'd like to use FlowScript, calling PHP pages from there (with cocoon.load maybe ?), exchange "data" between FlowScript and PHP in _javascript_ syntax:
cocoon.load("http://default.local/test.php?par_1=aaa&par_2=bbb&par_3=nnn"); // yes it works, PHP outputs a JS array

I'd like also to use JSON for the communication, and i am browsing around Cocoon's AJAX examples to understand what to put on sitemap to permit JSON communication.

So in few words, POST or JSON communication (sitemap will decide), here is what i'd like to realize
A. POST or JSON request (how?) ---> Cocoon FlowScript ---> JS array to PHP (how?) ---> do something with data ---> output another JS stuff array ---> grab it with FlowScript and answer back to browser
B. howto let sitemap choose between POST or JSON communication way?
C. am i obliged to use dojo? i found json-lib (link: http://json-lib.sourceforge.net/usage.html ) may i use it? if yes, how?

Many thanks in advance to anyone who will answer to A, B, or C or all three questions.

I'll be glad to clear out any dark points in what i wrote before.
ty

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Best Regards,
Maurizio