Pear Programming
From KdjWiki
What is PEAR?
PEAR is an acronym for PHP Extension and Application Repository.
PEAR is a framework and distribution system for reusable PHP components. People familiar with Perl should equate it with CSPAN (although it's more controlled and as such you have less duplications).
Working with PEAR
List installed (and hopefully available) modules:
$ pear list
Install new package (named XXX):
$ sudo pear install XXX