This is a cheat sheet on getting PHP5 on OpenBSD to have zip support. I needed this to get CiviCRM to work with Joomla.

First off install some require packages, including the zziplib package:

export PKG_PATH=http://mirror.aarnet.edu.au/pub/OpenBSD/4.5/packages/i386/
pkg_add -v zziplib
pkg_add -v autoconf-2.62

Now download and extract the PECL zip package:

mkdir /usr/local/src/
cd /usr/local/src/
wget http://pecl.php.net/get/zip
tar zxvf zip
cd zip-1.10.2/

Compile PECL zip, making sure you set your correct autoconf to use:

export AUTOCONF_VERSION=2.62
phpize
./configure
make
make install

Finally setup php5 and restart httpd:

cat << EOF >> /var/www/conf/php.ini
extension=zip.so
EOF
sudo apachectl stop
sudo apachectl start


Of course, this will go stale over time as new releases and versions come out, so YMMV.