Validates Credit Card Numbers of different type. Supports Visa, MasterCard, American Express, Diners Club, Discover and JCB Taken from http://www.regular-expressions.info/creditcard.html If you want to support only a particular type, customise it based on following....

http://www.r-project.org/mail.html

It may be useful inorder to replace those lines with li

Gets all parts of URL including port, username, password, fragment, query, and path

Matches every polynomial you want ;)

This is not supported in Javascript! Works well for php, python. Examples: +91-8800119719, 08800119719, 8800119719, +918800119719 etc.

Last captured word available via group W. Last captured sentence available via group S. Last parenthesis stuff in 6th capturing group.

simple url regex which also prevents capture of a trailing ">" (the html representation of ">")

a simple url regex which prevents matching of a trailing ">" (the html representation of a closeing angle bracket ">")

test

This regular expression will match the version string of a debian package