Regex for url validation with parts capturing

Question

Can a single regex be used to valdate urls and match all the parts, I have been working on one and what I have come up with so far is:

(?:(?P[a         


        

Answer 1

Modified version of mingfai's regular expression:

/^((?Phttps?|ftp):\/)?\/?((?P.*?)(:(?P.*?)|)@)?(?P[^:\/\s]+)(?P:([^\/]*))?(?P(\/\w+)*\/)(?P[-\w.]+[^#?\s]*)?(?P\?([^#]*))?(?P#(.*))?$/