This PHP tutorial shows how to measure memory usage, duration, and frequency of functions calls with the Xdebug profiler. Watch more at http://www.lynda.com/PHP-tutorials/Debugging-PHP-Advanced-Techniques/112414-2.html?utm_medium=viral&utm_source=youtube&utm_campaign=videoupload-dev-v0pQNe5JIoI.

This tutorial is a single movie from the Debugging PHP: Advanced Techniques course presented by lynda.com author Jon Peck. The complete course is 1 hour and 28 minutes long and demonstrates how to leverage PHP's built-in tools, as well as the Xdebug and Firebug extensions and FirePHP library to improve the quality of your code and reduce troubleshooting overhead

"Introduction
1. Built-In PHP Debugging
2. Introducing Xdebug
3. Debugging from the Browser
Conclusion"