DBG is a full-featured PHP Debugger and Profiler. Makes it easier to find problems or bugs in PHP scripts. DBG supports back-tracking, watching variables, viewing arguments passed to all nested function calls at any point of execution. Opensource.
System Requirements
Operating System: All 32-bit MS Windows (95/98/NT/2000/XP/Vista/7), POSIX (Linux,BSD,Solaris etc..), BSD, Linux, Windows