As you may know, there are more than just one RegEx flavour: PCRE, one from Java, one from .NET ... etc, and all of them have a little different syntaxes and some have a feature more or less.
Now my question is, if somebody knows if it is possible to use, for example, the flavour from .NET in PHP.
I need this respectively I wonder if this is possible because I want to make a little Regular Expression checker for my website and there I want to give the user the choice you select his flavour...
Or is the only one solution to convert the patterns from one flavour to another manually?
The only way I can think of is to write your own php modules, which provide you functions like net_match, java_match and so on. These modules are more or less simple wrappers, which may do a system call to an external program written in the respective language. As i never wrote a php mod, i don't know, if you have to write it in a specific language. I do also think, your webserver must be on a windows machine, as I have no idea of a unix port for .net 1
EDIT
1 as Ghost pointed out, there IS a way to get .net running on UNIX machines, named mono