Regular Expressions 101

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Community Patterns

18

Get path from any text

Recommended
PCRE2 (PHP >=7.3)
Get path (windows style) from any type of text (error message, e-mail corps ...), quoted or not. THIS IS THE SINGLE LINE VERSION !_ If you want understand how it work or edit it, go https://regex101.com/r/7o2fyy Relative path are not supported...
Submitted by nitrateag - 2 years ago (Last modified a year ago)
5

Match any url in text or html (http, https)

PCRE2 (PHP >=7.3)
Match any url in text or html (http, https)
Submitted by Jérémy Munsch - 3 years ago
4

CloudFlare

PCRE2 (PHP >=7.3)
Cloud Flare
Submitted by anonymous - 3 years ago
4

Email

PCRE2 (PHP >=7.3)
email format control
Submitted by ahmetbarut - 3 years ago
4

C# Regex Extract/Match Nested HTML Elements/Tags

.NET 7.0 (C#)
With this C# regex, you can easily match/Parse Nested HTML tags. Example input: ...
Submitted by w4po - 3 years ago (Last modified a year ago)
3

Hostname validation

Golang
Validates subdomain, root domain, and wild card domains
Submitted by AnonymousDapper - 8 years ago
3

National Insurance Number regular expression

PCRE2 (PHP >=7.3)
This regular expression is build from the description of NINO number of GOV.UK,
Submitted by Iftakhar Husan - 4 years ago
3

Livestock - Visual tag and Back tag

PCRE2 (PHP >=7.3)
Visual tag and Back tag cannot more than 15 characters or only can contain uppercase, lowercase, space and dash.
Submitted by Adrian Yim - 4 years ago
3

camelCase2snake_case

PCRE2 (PHP >=7.3)
Convert camelCase to snake_case def camelCase2snake_case(txt): """ Convert camelCase to snake_case https://regex101.com/library/wUcSv4...
Submitted by JV-conseil - 2 years ago
3

Discord ID:NAME#DISCRIM match

PCRE2 (PHP >=7.3)
For example, using `Carl-bot to dump members of the @everyone role ordering highest of id`: `!dump @everyone %i:%u -o id` Example of return: 498984530968051713:lanjt#2129 ......
Submitted by lanjt - 3 years ago
3

mega.nz files and folders

PCRE2 (PHP >=7.3)
Regex for matching https://mega.nz file and folder URLs. https://github.com/tonikelope/megabasterd/issues/215
Submitted by anonymous - 3 years ago
3

example

PCRE2 (PHP >=7.3)
example
Submitted by anonymous - 3 years ago
3

Extract URL parts only named capturing groups

Golang
Extract URL parts only named capturing groups
Submitted by dixanms - 3 years ago
3

Match any layer bracket pair (.NET)

.NET 7.0 (C#)
Match any layer bracket pair
Submitted by Yakumo Yukari - 3 years ago
3

Remove extra/useless python elements for GPT input.

PCRE2 (PHP >=7.3)
This RegEx removes unused elements such as inline comments and blank lines in python code. This will save you tokens and time when using GPT-3+ or ChatGPT to help code and debug.
Submitted by LukeL - 2 years ago (Last modified 2 years ago)
3

Caltrans EA validation with optional XX-XXXXXX entry and C##-#????#

.NET 7.0 (C#)
Checks validity of an EA number first two digits 01-12 followed by hyphen then a number from 0-4 and then 4 numbers or uppercase letters and ending in a 1 or 4 for example "05-1J7601". Adding a capital C to the beginning is also accepted "C05-1J7601", along with the entry of 2 X's hyphen and 6 X's ...
Submitted by RDJ@Ct - 2 years ago (Last modified 2 years ago)
3

Placeholder resolving

.NET 7.0 (C#)
.Net regular expression for resolving placeholders in the format of ${rewriter(multilevel:key)?fallback} (+ variations)
Submitted by anonymous - a year ago
2

domain for Google Data Studio (re2 dialect)

Golang
Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want
Submitted by anonymous - 8 years ago
2

URL parser

PCRE2 (PHP >=7.3)
The best way to parse URL via Regex. This can be used in javascript, PHP, etc.
Submitted by Ivijan-Stefan Stipic - 8 years ago (Last modified a year ago)
2

Dutch zipcodes

PCRE2 (PHP >=7.3)
no description available
Submitted by anonymous - 4 years ago (Last modified 6 months ago)
123...163

Community Library Entry

3

Regular Expression
.NET 7.0 (C#)

@"
\AX{2}-X{6}\z|\A(C?((0[1-9])|(1[0-2])))-[0-4][0-9A-Z]{4}[14]\z
"
n
Open regex in editor

Description

Checks validity of an EA number first two digits 01-12 followed by hyphen then a number from 0-4 and then 4 numbers or uppercase letters and ending in a 1 or 4 for example "05-1J7601". Adding a capital C to the beginning is also accepted "C05-1J7601", along with the entry of 2 X's hyphen and 6 X's "XX-XXXXXX"

Submitted by RDJ@Ct - 2 years ago (Last modified 2 years ago)