■ Armando Padilla has worked within the web technology industry for 13 years,

participating and leading every aspect of a LAMP-based web application. His

PHP experience began in 1998, when he created a small PHP web page for Thomas

Jefferson High School (Los Angeles). Armando’s most recent work has been for Yahoo!

as a senior engineer working on high-profile and high-traffic applications, such as the

Winter 2010 Olympics, 2010 FIFA World Cup, and Yahoo News mobile applications.

Armando now spends much of his time dabbling with new web technologies, reading

PHP/Zend–related books, and being with his family.

■ Tim Hawkins produced one of the world’s first online classifieds portals in 1993,

loot.com, before moving on to run engineering for many of Yahoo EU’s non-mediabased

properties, such as Search, Local Search, Mail, Messenger, and its social

networking products. He is currently managing a large offshore team for a major US

e-tailer, developing and deploying next-generation e-commerce applications. He

loves hats and hates complexity.

■ Aaron Saray has been madly in love with PHP since 2001. As a Zend Certified

Engineer, Milwaukee PHP users group organizer, author, and technical editor, Aaron

continues to remain active in the PHP community. He continues to push out new

open source software as well as keep a web development blog on

http://aaronsaray.com.

Pro PHP Application Performance will help you understand all the technologies and components which play a role in how well your applications run. When seconds can mean the difference between retaining a user and losing a user, it's important for all of us to have optimization as part of our project roadmap. But what components within your application should you analyze? How should you optimize? And how can you measure how well your application is performing? These are some of the questions that are answered in this book. Along the way you will also learn the "why" of optimizing. You'll discover why you should optimize a specific component, why selecting one function over another is beneficial, and how to find and use the optimization tools available to the open source community. You'll also learn how to deploy caching software as well as web server software. Pro PHP Application Performance will also teach you more advanced techniques, such as: Using Xdebug to profile functions that are not running as efficiently as possible. Comparing opcode executed by different PHP functions to narrow the search for functions that run efficiently. Using strace to analyze Apache while your application is served to the user. Once you complete this book you will have a complete sense of where to start optimizing and, most importantly, have the tools which allow you to continue optimizing in other PHP applications going forward. What you'll learn * How to improve the performance of existing PHP applications * How to maximize the performance of existing operating systems and databases * How to refactor existing PHP code for better performance * How to identify and rectify bottlenecks in PHP code * How to take advantage of variable caching to increase performance * Strategies for selecting server hardware for best performance Who this book is for This book will appeal to established PHP developers who wish to write new, complex applications or want to rearchitect existing ones. Developers of other languages such as Ruby, Python, and VB.NET will also have an interest in the techniques for tuning the performance of web servers, databases, and operating systems. Table of Contents * Benchmarking Techniques * Improving Client Download and Rendering Performance * PHP Code Optimization * Opcode Caching * Variable Caching * Choosing the Right Web Server * Web Server and Delivery Optimization * Database Optimization * Installing Apache, MySQL, PHP, and PECL on Windows * Installing Apache, MySQL, PHP, and PECL on Linux