Regular Expressions 101

Order By

Sponsors
There are currently no sponsors. Become a sponsor today!

Community Patterns

1

groupping by :#

PCRE2 (PHP >=7.3)
sed 's/\(:#\)./ -CLEARED-/g'
Submitted by anonymous - 8 months ago
1

happy birthday

PCRE2 (PHP >=7.3)
match hbds
Submitted by anonymous - 8 months ago
1

Regex to catch prices

PCRE2 (PHP >=7.3)
(faturou\s|faturamento de\s|faturei\s|de um faturamento )(mais\sde\s)(((((R\$)+(\s)(\d){1,6}(\s)((\.|\,)\d{1,3}|k|mil))))+|((de\s(\d){1,3}(k|mil)\spara\s(\d){1,3}(k|mil)))+)(\sde\sfaturamento)(\sem\s(menos\sde\s)(\d{1,2})\sdias)(\sfoi o que a minha (aluna|cliente|mentoranda|mentorada)+ faturou)(\sap...
Submitted by Leonardo Paris - 8 months ago
1

camelCase -> snake_case

PCRE2 (PHP >=7.3)
Works with many forms of alphanumeric camelCase camelCase camel camelCaseCaseCase... (with as many words as you want) ca65melCase (ca65mel_case) camelCCase (camel_c_case)...
Submitted by inesvar - 8 months ago
1

PascalCase -> snake_case

PCRE2 (PHP >=7.3)
Works with many forms of alphanumeric PascalCase PascalCase Pascal PascalCaseCase Pascal684Case (pascal684_case) Pas45calCase (pas45cal_case)...
Submitted by inesvar - 8 months ago
1

simple email validator

PCRE2 (PHP >=7.3)
Email address validator
Submitted by anil - 8 months ago
1

Python logs parser (Airflow)

Python
Parser for individual row of log pattern for parsing row in format: [2023-03-11 00:00:07,377] {taskinstance.py:1088} INFO - Starting attempt 1 where: - time_full: [2023-03-11 00:00:07,377]...
Submitted by anonymous - 8 months ago
1

homework 1

PCRE2 (PHP >=7.3)
this is the answer for question 1
Submitted by Christian Thrige Nielsen - 9 months ago
1

Remove multiple forward slash from url

PCRE2 (PHP >=7.3)
(): This is a capturing group that matches any character except a colon :, and it captures this character for later use in the replacement. (/ {2,}): This part matches two or more consecutive forward slashes. The replacement part $1/ uses the captured character from the first part (which is any char...
Submitted by Apon Ahmed - 9 months ago (Last modified 9 months ago)
1

IPv4 address with optional CIDR suffix

ECMAScript (JavaScript)
Matches any valid IPv4 address with, optionally, a CIDR suffix. 0.0.0.0 to 255.255.255.255 and 1.1.1.1/0 to 1.1.1.1/32. Use the following regex if you don't want to allow the CIDR suffix. ...
Submitted by MAZ01001 - 9 months ago
1

Credit card regex

PCRE2 (PHP >=7.3)
Credit card name and surname with turkish char
Submitted by anonymous - 9 months ago
0

PLP redirection

PCRE2 (PHP >=7.3)
PLP redirection
Submitted by anonymous - 9 months ago
1

Regex to Match Regular Expression in JS/TS

PCRE2 (PHP >=7.3)
Matches regular expressions in JS/TS (EcmaScript) code including none or one of the flags g, i`, m, u, y`.
Submitted by Redu - 9 months ago
1

Match Single Line (//) Comments in JSON

PCRE2 (PHP >=7.3)
Doesn't get confused by the url values like "https://www.example.com" or "file:///some.txt"
Submitted by Redu - 9 months ago (Last modified 9 months ago)
1

username_unix.gamesave

PCRE2 (PHP >=7.3)
TILE_WIDTH = 2 # Includes space for padding and one space between tiles formatted_board = "" for i in range(rows): formatted_row = "" for j in range(columns):...
Submitted by robert paulson - 9 months ago (Last modified 5 months ago)
1

Estract download speed from Ookla Speedtest output

PCRE2 (PHP >=7.3)
surely can be optimized more, but it does the job and the interested number of lines is fairly low.
Submitted by anonymous - 9 months ago
1

111

PCRE2 (PHP >=7.3)
((?:[零一二三四五六七八九十百]+))$
Submitted by anonymous - 9 months ago
1

IANA Media Type

Java 8
Parses an IANA Media Type value. Doesn't seem to capture repeating parameters, which is a bit of an edge case but valid I think - any suggestions on how to fix would be appreciated.
Submitted by scottbdr - 9 months ago
1

Mediawiki History Dump filenames

Python
Matches filenames of MediaWiki history dumps.
Submitted by CristianCantoro - 9 months ago
1

loyal

PCRE2 (PHP >=7.3)
loyal
Submitted by anonymous - 9 months ago
1...2526272829...900

Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
(\b(?'first_word'[A-Z](?!([A-Z0-9]*\b|[[:alnum:]]*_)(?# the word isn't in all caps and doesn't contain underscores))(?:[a-z0-9]*)))|(\G(?'trailing_word'[A-Z][a-z0-9]*))
/
gm
Open regex in editor

Description

Works with many forms of alphanumeric PascalCase

  • PascalCase
  • Pascal
  • PascalCaseCase
  • Pascal684Case (pascal684_case)
  • Pas45calCase (pas45cal_case)
  • PascalCaseCaseCase (with as many words as you like)
  • PPascal (p_pascal)
  • PascalCCase (pascal_c_case)

What isn't matched

  • camelCase
  • words with '_' underscores in them (SCREAMING_SNAKE_CASE, Pascal_Snake_Case)
  • words without lowercase letters (ALLCAPS, ALL54CAPS)

Limitations

  • all 'Capitalized' words are matched and substituted to 'capitalized'
  • PascalCase with non-alphanumeric characters isn't matched
Submitted by inesvar - 8 months ago