A few software out there will help us (newbie) to learn regex faster with “experience mentor”
I like these software :
For medium level, since I’m totally newbie 🙂
Mastering regex book also helpfull, I just forgot the title, but in my amazon wishlist.
I just spend some money for openbsd books 🙂
Other good source :
PHP Manual on Regex Section
Happy learning 🙂