Erm.. you are probably confusing something here. Do you think both are interchangable?
Delphi4PHP is: The language PHP + some PHP classes that resemble something that would look like some sort of '
VCL' components to a delphi developer.
The PSVLib you linked to are additional PHP classes to extend the PHP '
VCL'.
Nevertheless, everything in Delphi4PHP is pure PHP.
Phalanger is something completely different. Phalanger takes pure PHP code, and compiles it to run on the .NET Framework (which is a great idea btw. and a massive performance gain). This would i.e. allow you to compile phpBB to .NET code and write phpBB plugins in C#, VB or Oxygene for .NET.
Of course it would be possible to take a Delphi4PHP project, and compile this to .NET through phalanger. But nobody with a sane mind would bother doing this. Sane guys would directly take Oxygene and write ASP.NET (MVC) applications
Btw: Delphi4PHP (lastly named RadPHP) will be revived in the new "Html5Builder", coming next year.
So, what are you now exactly referring to, and what is your specific question?