Regular Expressions 101

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Community Patterns

Search among 13,820 community submitted regex patterns...

6

SO: fail2ban regular to find 403 request in nginx

http://stackoverflow.com/q/25778420/2072035

Submitted by anonymous - 9 years ago (Last modified 4 months ago)

6

[A-Za-z\x{0600}-\x{06FF}\x{1000}-\x{1021}_-][-\w]*

PCRE (PHP <7.3)

A-Za-z\x{0600}-\x{06FF}\x{1000}-\x{1021}_-*

Submitted by [A-Za-z\x{0600}-\x{06FF}\x{1000}-\x{1021}_-][-\w]* - 9 years ago

15

IPv4

PCRE (PHP <7.3)

no description available

Submitted by robwa - 8 years ago

8

Extract url GET parameters

PCRE (PHP <7.3)

Returns key/value pair of a url. Also works with google fonts which has additional information

Submitted by anonymous - 9 years ago

8

If-Then-Else Conditionals

PCRE (PHP <7.3)

no description available

Submitted by anonymous - 8 years ago

28

CSV line parsing

PCRE (PHP <7.3)

Captures all fields from a CSV file's line. Can be customized with user-defined field separator and protecting character.

Submitted by Various - 9 years ago

51

Disorted Email Addresses

PCRE (PHP <7.3)

Matches distorted email addresses and converts them back to real ones.

Submitted by dislick - 11 years ago

7

Sentence grabber /w extra check

PCRE (PHP <7.3)

Grabs sentences including terms like: e.g. z.b. Figs.These get caught in 1st capturing group. Problem: how to only accept matching sentences which contain pattern \b\d+[a-z]{0,2}\b?

Submitted by light0 - 10 years ago

7

IPv4 Validator

PCRE (PHP <7.3)

no description available

Submitted by anonymous - 3 years ago (Last modified 4 months ago)

7

Max - URL Extract

PCRE (PHP <7.3)

no description available

Submitted by Ayush - 8 years ago

18

Date: DD-MM-YYYY hh:mm:ss

PCRE (PHP <7.3)

Validate and capture dateTime parts, includes validation for leap years, range 1000-2999. Fixed bug

Submitted by Ka. - 11 years ago

22

UK Postcode Checker

PCRE (PHP <7.3)

Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional spac...

Submitted by MaffooBristol - 9 years ago

4

For Auto RTFs

PCRE (PHP <7.3)

no description available

Submitted by Dan Bloomquist - 11 years ago

4

outer Parentheses

PCRE (PHP <7.3)

Finds the outermost pair of parentheses. Compatible with any amount of nesting

Submitted by Jonas Gerneth - 10 years ago

4

Command handling

PCRE (PHP <7.3)

Handles commands like in CMD

Submitted by anonymous - 9 years ago

4

parsing a numeric strings with backslash using regexp

PCRE (PHP <7.3)

no description available

Submitted by A.K. Asik - 9 years ago

4

uri parser

PCRE (PHP <7.3)

no description available

Submitted by anonymous - 9 years ago

4

Match nth occurence of pattern

PCRE (PHP <7.3)

Match nth occurence of the patterns in the inner parenthesis. Put nth that you want to match in the curly braces (here, {3}).

Submitted by Alex Hall - 9 years ago

4

Equation matching (without equal)

use this to get value of any side of an equation. You can combine this with https://regex101.com/r/fH5kJ1/1

Submitted by Kerosene2000 - 8 years ago

4

Epic EHR Sticker QR code patient information

PCRE (PHP <7.3)

Text output produced by reading the QR code present on patient stickers created by Epic (R) medical record software

Submitted by MeWa - 8 years ago

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