On Pierre-Alain Joye's blog today, there's a quick release note about the latest version of his PECL package, Zip, being released - 1.4.0.

I just release Zip-1.4.0. This release adds support for all kind of comments, read or write. One bug has been fixed, Windows users may had problems to add files to an existing archives. Thanks to Irokez (pear's OpenDocument project for SoC) to have catched it.

He also includes a brief code example of the commenting functionality.