A fork is a new version of a project that a separate group of developers that want to give the project a different route. A new PHP forked version was created by Robert Eisele to address needs that he felt were important.

He mentions the forked version as updated with the changes Robert wanted to see made and a few other concerns that have come from it. One issue is the PHP name and licensing problems and another is whether or not you should use this fork (and what its future might be).