This is loosely based on some other examples, but goes a bit further in terms of what it will and won't match. In particular, it matches IPv6 addresses like ff02::, ff02:1000::, and (the syntactically valid but improbable) ::0001:0002

Use with csv with ";" delim. Matches values that contains carriage return not surrounded by double quotes.

Match only first occurrence of word in a line.

password con 8

Searches for credit card numbers from MasterCard or visa

For use on wordpress on multisite. Finds mp4 videos within the content.

Matches publicly available IPv4 addresses (excludes 10., 172.16-32, and 192.168 blocks).

Detects almost all URLs contained in a sentence

Match any IP adress or Subnet masks and split all bytes in capture groups

match any type of url and split each part (protocol, domain, page, GET, and ID) in capture groups

for finding user mentions in markdown-like comments

Matches all spellings of the name Gaddafi that I've yet discovered.

URL Parsing

Matches customer portion of call detail records found in the fields dcontext, lastdata, and usefield of an Asterisk CDR table. Additional processing required to get fully clean values.

remove html tags, while leaving text in between

Simple and not complete pattern for getting the items of a Data URI scheme.