This is experimental and assumes you are already familiar with ClearOS. This will upgrade all your server, so only use if all your PHP apps support PHP 5.5 You should test this on a backup, as there is no rollback to PHP 5.3

Special thanks to Rémi Collet

You can skip some of these steps if you are deploying on an existing system which already has PHP & MySQL.

• Install ClearOS 6.5 from Linode
• You'll want to set a real domain name (subdomain is fine)
• Get PHP (Web server) and MySQL from the marketplace
• Initialize OpenLDAP with visiting PHP (Web server)
• Incoming Firewall: Open HTTP & HTTPS
• Start MySQL and set root password
• Set default site

• Activate the software repository app to make it easy to track
• Activate the clearos-updates-testing repo to get latest code, with revamped webserver in 6.6 Beta 1 & Beta 2
• Launch software updates (about 40 updates happen)

cd /var/www/html
wget --output-document=tiki-check.php https://svn.code.sf.net/p/tikiwiki/code/trunk/tiki-check.php

visit example.org/tiki-check.php to check PHP version. You will be at 5.3.x

cd /root
wget http://rpms.famillecollet.com/RPM-GPG-KEY-remi
rpm --import RPM-GPG-KEY-remi

cd /root
wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm

yum --enablerepo=remi-php55,remi,clearos-core update php*

You will see a lot of warnings. At this point, PHP 5.5 is installed but you need to reboot server. Just restarting Apache is not enough.

reboot

visit example.org/tiki-check.php to confirm you are now at PHP 5.5.x

# php -v
PHP 5.5.14 (cli) (built: Jul 16 2014 11:10:19)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies

yum install --enablerepo=remi,remi-php55 install php-opcache
service httpd restart

• Make sure .htaccess works (same issue as with PHP 5.3) → http://tracker.clearfoundation.com/view.php?id=1661

• http://blog.famillecollet.com/pages/Config-en
• http://blog.famillecollet.com/post/2014/06/27/PHP-5.4.30-and-5.5.14
• http://www.clearfoundation.com/component/option,com_kunena/Itemid,232/catid,17/func,view/id,61167/
• http://www.clearfoundation.com/component/option,com_kunena/Itemid,232/catid,17/func,view/id,62573/
• http://tracker.clearfoundation.com/view.php?id=1864
• https://forums.zarafa.com/showthread.php?10683-Is-it-possible-to-run-Zarafa-without-the-PHP-mapi-extension