A Vim client to connect to Xdebug was originally written by Seung Woo Shin <segv sayclub.com> remote PHP debugger which was then developed by Sam Ghods <sam box.net> and renamed DBGp client

In 2009 Hadi Zeftin updated the script to run under 7.1 and added tab support DBGp-client

And this is Hadi Zeftin's version updated to run using pathogen.vim