This PCRE matches DustySky URI structure.

Matches any IPv4 address

Will match and assign to named groups any form of identification for a steam user. Note that profile links and steamid64s are exclusive, preferring the more specific definition to the other, as well as is the case with customurls and full custom profile links.

Select TLD (.com, .fr ...) from url or domain

Match a Google Analytics Campaign query string

Detect if an url is local (even if written in an absolute way)

Test for all ISO 8601 date formats and only accept valid dates, e.g. 2016-02-29, but not 2016-02-30 or 2017-02-29.

Ability to capture emails sent and received from Exchange (using Journaling that has been activated on specific users) that have one or more of the following Project Number prefixes: “15-“ “16-“ “17-”... “30-“ “GGO”...

1100582367|SDFDSFDSFDSFDSFDF GBC213WREW|RWEFSDFSDF 1100582377|DSFDSFDSFDSF 2NDG.S.D BIKADSFDSFDSFNO.421 1100582387|SDFSDFSDFDSF

find emails(emicha@mail.bg)

Look(ahead|behind)s are slow

Match any value between two less than and two greater than symbols.

Extract movie ID from URLs like YouTube and Vimeo