i am not sure in what specific language you are interested in work with, but if you are interested in some tutorials, you could always type something like,
"tutorials regular expressions + PHP",
into a search box
, and then hit search, for the browser to have its results. I found the following link useful, if you are interested:
You might want to go to Amazon.com, and get type "regular expressions" into their search boxes, under the heading of books, and you should be able to find a book, or 2, on the subject matter.