Xdebug

Xdebug project is an extension that helps you debugging your script by providing a lot of valuable debug information. The debug information that Xdebug can provide includes the following:

- stack and function traces in error messages with:
- full parameter display for user defined functions
- function name, file name and line indications
- support for member functions
- memory allocation
- protection for infinite recursions

Xdebug also provides:

- profiling information for PHP scripts
- script execution analysis
- capabilities to debug your scripts interactively with a debug client