Xdebug for PHP Developers: Advanced Debugging Made Easy
Xdebug - a powerful PHP extension that provides advanced tracing and profiling capabilities for PHP developers.
Debugging PHP
A Complete Guide to PHP Debugging
If you're using PHP or adopting a PHP application, you need to know how to debug in PHP. In this guide, you will learn certain PHP debugging methods.
Debugging in PHP
To help solve the debugging problem in PHP, here's a primer on what debugging is and its techniques, how they work, and what makes them different. Look into the blog for detailed illustration with simple examples and know more about it.