Пакет php5-xdebug: Информация

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 traces 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
    * code coverage analysis
    * capabilities to debug your scripts interactively with a debug client