Are there any Parsing Expression Grammar (PEG) libraries for Javascript or PHP?

Question

I find myself drawn to the Parsing Expression Grammar formalism for describing domain specific languages, but so far the implementation code I\'ve found has been written in

Answer 1

Language.js:

Language.js is an open source experimental new parser based on PEG (Parsing Expression Grammar), with the special addition of the "naughty OR" operator to handle errors in a unique new way. It makes use of memoization to achieve linear time parsing speed