readgzfile
gzrewind
gzclose
gzeof
gzgetc
gzgets
gzgetss
gzread
gzopen
gzpassthru
gzseek

gztell
gzwrite
gzputs
gzfile
gzcompress
gzuncompress
gzdeflate
gzinflate
gzencode
ob_gzhandler
zlib_get_coding_type