I saw that new PHPBB has zip compression support for backup files. Maybe try using 7-zip build in ZIP archiver. For ZIP and GZIP formats 7-Zip provides compression ratio that is 2-10 % better than ratio provided by PKZip and WinZip.
URL: http://www.7-zip.org" target="_blank
Better backup files ZIP compression
Forum rules
Discussion of general topics related to the new release and its place in the world. Don't discuss new features, report bugs, ask for support, et cetera. Don't use this to spam for other boards or attack those boards!
Discussion of general topics related to the new release and its place in the world. Don't discuss new features, report bugs, ask for support, et cetera. Don't use this to spam for other boards or attack those boards!
Better backup files ZIP compression
If you provide us with a PHP class to zip and unzip using that algorithm we'll consider it.