This repo can be used additionally to the squeeze-php54 repo of dotdeb.org.

Add the following into /etc/apt/sources.list

deb http://debrepo.frbit.com/ frbit-squeeze main

Add the key, update apt and install packages

wget -O – http://debrepo.frbit.com/frbit.gpg | sudo apt-key add –
aptitude update
aptitude install php5-igbinary php5-mongo php5-oauth php5-phalcon php5-runkit php5-stats php5-stomp php5-yaf php5-yaml