I need to Compress XML from a device to the server(PHP)

i cannot get the data sent by the device which uses Windows Mobile OS , 1-What if i sent t开发者_StackOverflowhe request to a the PHP function with Content-Encoding: gzip; will it really compress this XML 2-i tried to use the gzuncompress() on the $_POST['Data'] -> XML ,but it didn't work 3-i tried to use the file_get_content("compress.zlib://php://input") to return XML ,but it didn't work