php4-apd | PHP code execution profiler and debugger | Mehr ...
Advanced PHP Debugger is a full-featured PHP profiler/debugger that is loaded as a zend_extension. It aims to be an analog of C's gprof or Perl's Devel::DProf, and provides PHP developers with a number of additional functions which can be used to obtain internal code execution details such as timing information, function call tree and stack backtrace. This is particularly useful for performance profiling purposes. See pear.php.net/apd for more information.
