trying to use gzlib & ZZIPlib within PHP

Dear PHPers, I downloaded and compiled the zlib from www.gzip.org/zlib and recompiled the php and apache, but somehow I get gzcompress and gzuncompress undefined. Then I tried with ZZIPlib with --with-zip switch when compiling PHP then recompile apache. After restarted the apache, I do see variables get set for zip but when I do zip_open ("abc.zip") I got an error saying zip_open not defined. How do I get the above gzcompress & zip_open to work? I checked with httpd.conf for zlib. I also enable the compression for php.ini Any helps would be greatly appreciated. --Wo