Expert Debugger is a free easy-to-use tool for debugging PHP scripts. Expert Debugger uses the DBG PHP Debugger and allow to debug scripts via network or on local computer. You can run scripts in step-by-step mode and to trace values of any variables and script output. The debugger has a comfortable interface and can be integrated with IDE or editors.
This product includes DBG PHP Debugger, Copyright(C) 1999, 2000, 2001, 2002 Nusphere Corporation, http://www.nusphere.com/dbg