con phpinfo ho queste info sulle sezioni zip...magari può servire...


zip

Zip enabled
Extension Version $Id: php_zip.c 305848 2010-11-30 11:04:06Z pajoye $
Zip version 1.9.1
Libzip version 0.9.0

zlib

ZLib Support enabled
Stream Wrapper support compress.zlib://
Stream Filter support zlib.inflate, zlib.deflate
Compiled Version 1.2.3
Linked Version 1.2.3