TEK·X is a great conference event for professional PHP developers. It takes place in Chicago between May 18 and 21 and hosts tutorials and sessions from some of the best speakers in the PHP market.

Slides

Bad Guy For a Day - A Websecurity hands-on tutorial
Workshop by Arne Blankerts
Building a Zend Framework application
Workshop by Rob Allen
PHP Best Practices
Workshop by Matthew Weier O'Phinney, Lorna Jane Mitchell
JavaScript for PHP Developers
Workshop by Ed Finkler
The Lost Art of Simplicity
Talk by Josh Holmes
Apache Cookbook
Talk by Rich Bowen
Working with Zend_Form
Talk by Rob Allen
Graphs, Edges & Nodes: Untangling the Social Web
Talk by Joël Perras
Advanced Date/Time handling with PHP
Talk by Derick Rethans
Subversion in a Distributed World
Talk by Lorna Mitchell
SQL Injection Myths and Fallacies
Talk by Bill Karwin
Desktop Apps with PHP and Titanium
Talk by Ben Ramsey
Domain NoSQL: Next Generation Play-Doh
Talk by Matthew Weier O'Phinney
Introduction to Testing with Selenium
Talk by Arne Blankerts
XDebug
Talk by Derick Rethans
A Web Application Framework for People who Hate Frameworks - Lithium
Talk by Nate Abele, Joël Perras
New SPL Features in PHP 5.3
Talk by Matthew Turland
Agile in a waterfall world
Talk by Jason E. Sweat
Streams, Sockets and Filters - Oh My!
Talk by Elizabeth Marie Smith
Models for Hierarchical Data with SQL and PHP
Talk by Bill Karwin
The Art of Message Queues
Talk by Mike Willbanks
Tips & Tricks to get the most of PHP with IIS, and the Windows Azure Cloud
Talk by Sumit Chawla, Kanwaljeet Singla
MySQL 5.5 and Scalability
Talk by Ligaya Turmelle
PHP Inside
Talk by Derick Rethans
Caching with Memcached and APC
Talk by Ben Ramsey
Lean Mean PHP Machine
Talk by Jason Austin
Design Patterns
Talk by Jason E. Sweat
Replication with MySQL
Talk by Ligaya Turmelle
Cross Platform PHP
Talk by Elizabeth Marie Smith