Regular Expressions 101

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16

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 - a year ago (Last modified 10 months 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
2

Regex tutorial

Java 8
Case insensitive match the whole word betwween \bword\b
Submitted by anonymous - 4 years ago (Last modified 10 months 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 - 3 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 - 3 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 - a year 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

example

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

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 - 2 years ago
2

Task 4 Quiz

PCRE2 (PHP >=7.3)
It needs a major modification, since matching an integer is required. The accepted answer \d+ involves only "positive" integers. But -333 or +777 are also integers, which leads to two possible solutions with the last one being the most accurate: -?\d+ : The hyphen (optional minus sign) and a digit ...
Submitted by seQuienSoy - 2 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 - a year ago (Last modified a year ago)
2

Discord Username (old & new)

PCRE2 (PHP >=7.3)
Accomodate for Discord's username changeover and match against either the old username or the new username. But only one or the other. Match: CesarHvl#9000 cesarhvl cesar.hvl...
Submitted by cesarhvl - a year 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 - 7 years ago (Last modified 10 months ago)
2

Dutch zipcodes

PCRE2 (PHP >=7.3)
no description available
Submitted by anonymous - 3 years ago (Last modified 4 days ago)
2

Dutch streetnames + housenumber + extension

PCRE2 (PHP >=7.3)
Validates a streetname + housenr + extension Somestreet 12 b
Submitted by anonymous - 3 years ago (Last modified 4 days ago)
2

web log entry

PCRE2 (PHP >=7.3)
no description available
Submitted by PepeRG - 3 years ago
1

Matching decimals in european format (dot as grouping separator, comma as decimal separator)

Java 8
A regex for validating decimal numbers in the European number format (in many parts of Europe at least, including Germany). A comma is used as a separator for the decimal number, a dot as a separator for thousand places.
Submitted by Florian Drees - 3 years ago (Last modified 3 years ago)
2

Comparison of decimals with operators such as <, >, !=, ==, <>

Java 8
Regex expression for comparing decimal numbers with the usual comparison operators such as (greater than), >= (greater than or equal to), != (not equal to), == (equal to), ... The regex also allows filtering of data from e.g. a database, whereby the first value is not needed, e.g. [FIELD] < 100
Submitted by Florian Drees - 3 years ago
2

Url

PCRE2 (PHP >=7.3)
Port https://regex101.com/library/cX0pJ8 to PCRE2 (PHP >= 7.3)
Submitted by semivori - 3 years ago
123...130

Discord Username (old & new)

2

Regular Expression
PCRE2 (PHP >=7.3)

/
^[^#]{2,32}#\d{4}$|^(?!.*\.\.|[A-Z])[a-z\d_.]{2,32}$
/
gm
Open regex in editor

Description

Accomodate for Discord's username changeover and match against either the old username or the new username. But only one or the other.

Match: CesarHvl#9000 cesarhvl cesar.hvl cesar_hvl

No Match: Cesar#Hvl#9000 CesarHvl#90001 CesarHvl c cesarhvllllllllllllllllllllllllll cesar..hvl cesarhvlCesarHvl#9000 (^^*(&)

Submitted by cesarhvl - a year ago