To remove the assembly from the GAC, run gacutil with /u switch and the assembly name.
[Note] Don't specify the path to the assembly and also do not add .dll extension to the assembly name [End Note]
gacutil /u phpclass
This article shows you how simple it is to use Interoperability with COM, or COM interop, in PHP or VB6, which enables you to use .NET assembly in your traditional COM based applications.
COM objects have been fundamental to Windows programming for many years, but .NET Platform offer many advantages over and above it, .NET Platform applications will eventually replace those developed with COM.
--Jayesh is an applications consultant for a health company in Auckland, New Zealand. He has several years of n-Tier development experience and is currently working with Visual Basic.NET to develop interactive client solutions.