Xdebug2.1.3

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: 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.