using stdin to get POST content in module version

Hi all, I'm trying to use POST method to get data (raw data, not a file, so I can not use <input type="file">) to my database through a PHP script. Php is running as an apache module on my computer (a linux box), and I wonder what is the module equivalent of stdin for cgi. Where can I read the POST content ? If I try to open php://stdin, I get a bad file descriptor warning message, and fopen fails returning 0. Any ideas ? Thanks. -- Mathieu Poumeyrol - IDM