Thread:Extension talk:ParserFunctions/$wgPFEnableStringFunctions/reply (11)

No Security holes, perhaps some stuff will break from time to time but you can have this problem with all MW extensions when a new MW version comes out. Its not like we'd have to to this for ALL MW classes, just for some so it wouldn't be too problematic I guess. I think there is just nobody developing this because everybody is depending on Parser Functions in their own wikis already, just like me.