Icy Phoenix

A HOWTO on Optimizing PHP with tips and methodologies
PHP is a very fast programming language, but there is more to optimizing PHP than just speed of code execution.

In this chapter, we explain why optimizing PHP involves many factors which are not code related, and why tuning PHP requires an understanding of how PHP performs in relation to all the other subsystems on your server, and then identifying bottlenecks caused by these subsystems and fixing them. We also cover how to tune and optimize your PHP scripts so they run even faster.

http://phplens.com/lens/php-book/optimizing-debugging-php.php

The PHP Anthology Volume 2, Chapter 5 - Caching
By Harry Fuecks

February 16th 2004

Reader Rating: 8.8

In the good old days, back when building Websites was as easy as knocking up a few HTML [1] pages, the delivery of a Web page to a browser was a simple matter of having the Web server fetch a file. A site's visitors would see its small, text-only pages almost immediately, unless they were using particularly slow modems. Once the page was downloaded, the browser would cache [2] it somewhere on the local computer so that, should the page be requested again, after performing a quick check with the server to ensure the page hadn't been updated, the browser could display the locally cached version. Pages were served as quickly and efficiently as possible, and everyone was happy (except those using 9600 bps modems).

The advent of dynamic Web pages spoiled the party, effectively "breaking" this model of serving pages by introducing two problems:

http://www.sitepoint.com/print/php-anthology-2-5-caching

cache
http://unearth.sourceforge.net/
http://www.jpcache.com/
http://eaccelerator.net/
http://turck-mmcache.sourceforge.net/

Thanks, I'll have a look. :mri: