The Xdebug extension 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:
o full parameter display for user defined functions
o function name, file name and line indications
o 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