It may be useful inorder to replace those lines with li

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

This will remove all facebook urls from a HTML string

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

For python regex, substiution not working properly. It is not replcing matched content of $1... and so on. Please take a look.

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

Verifies YouTube video links AND pulls the video ID from them in a matching group. Works with all capitalizations. It also matches the WHOLE link but sorts the video ID into a group. Works with JavaScript, PHP and Python. (Not tested with any other Regex engine) ...