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Community Patterns

-3

IPv4 address

Created·2016-04-06 17:12
Flavor·Python
Matches any IPv4 address
Submitted by anonymous
-3

TD data from html table

Created·2015-12-24 10:15
Flavor·Python
no description available
Submitted by Deepak Bansal
-3

matching words between tags

Created·2015-09-22 15:10
Flavor·ECMAScript (JavaScript)
matching words between square brachets tags include newline or carriage return
Submitted by anonymous
-3

Html Tags

Created·2015-09-10 09:06
Flavor·ECMAScript (JavaScript)
Matches HTML structure
Submitted by sagar
-3

Matches percentage with any number of digits

Created·2015-06-10 19:26
Flavor·Python
Only captures value for converting percentage to decimal. Returns empty if percentage but no value. no match = no percentage found
Submitted by sharkey
-3

remove facebook urls from html

Created·2015-06-03 01:35
Flavor·ECMAScript (JavaScript)
This will remove all facebook urls from a HTML string
Submitted by Russell Miller
-3

Strict email validation

Created·2015-02-28 10:35
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-3

Detect a numeric string

Created·2015-01-08 22:59
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Ankur Chauhan
-3

Match substitutions

Created·2014-07-26 13:32
Flavor·Python
Match regular expressions substitutions, I personally use this to perform my validate if it is a substitution, then call re.sub() on it.
Submitted by Zarthus
-3

Number

Created·2014-07-13 16:14
Flavor·ECMAScript (JavaScript)
Gets all numbers in a string. This includes positive and negative numbers aswell as integers and floats. By: http://www.benlorantfy.com/
Submitted by Ben
-2

Codeforces 1800A Solution

Created·2023-07-24 16:01
Flavor·ECMAScript (JavaScript)
By inserting this regex in a programming language to test it against Codeforces 1800A you'll solve the task
Submitted by EntityPlantt
-2

Ascending and Descending order

Created·2023-07-17 15:51
Flavor·Java
This regex is to match Ascending or descending order of 8 digit number
Submitted by anonymous
-2

rustyms: pro forma single modification

Created·2023-06-21 21:59
Flavor·Rust
The regex to match a single pro forma modification with all its intricacies.
Submitted by Douwe Schulte
-2

Match whitespace and colon, except in specific words

Created·2022-08-10 15:21
Flavor·ECMAScript (JavaScript)
For string splitting / deconstructing
Submitted by anonymous
-2

email regexp

Created·2017-07-14 05:25
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

phone number

Created·2016-07-19 04:29
Flavor·Python
An extremely complete regex, that... Accepts international phones and most of regional phone numbers; Accepts phone numbers with/without "+", with/without space or "-" in the middle of the phone, and more. Gets groups of all important data of the phone number (local code, country code and the phone number itself)
Submitted by @thegamerbr1
-2

Email Validation

Created·2015-12-01 22:35
Flavor·Python
Full email validation with optional "." "-" "_"
Submitted by Jakub Stasiak
-2

match unescaped quotes

Created·2015-11-05 21:28
Flavor·Python
no description available
Submitted by anonymous
-2

adsf

Created·2015-11-01 11:11
Flavor·Python
adfadfad
Submitted by anonymous
-2

Validating comma delimited strings for whitespaces & extra commas

Created·2015-10-28 10:03
Flavor·ECMAScript (JavaScript)
Validating comma delimited strings for whitespaces & extra commas -- +(,()+){0,}
Submitted by Cyril Mathew
-2

Between two strings

Created·2015-10-27 19:18
Flavor·Python
Awesome explanation of nested lookbacks
Submitted by OnlineCop
-2

Multiple Email Address Validation

Created·2015-10-26 06:50
Flavor·ECMAScript (JavaScript)
Validates Multiple email addresses seperated by comma.
Submitted by Rajesh Badam
-2

match commas between sets or members, but not inside members.

Created·2015-10-23 16:41
Flavor·Python
matches only those commas that are between sets, or between members of a set. does not match commas that are inside members.
Submitted by Amrit Kohli
-2

Roman numbers

Created·2015-10-20 13:01
Flavor·ECMAScript (JavaScript)
This regex matches roman numbers from 1 (I) to 3999 (MMMCMXCIX)
Submitted by Nicolò Ribaudo
-2

Valid Email

Created·2015-10-19 17:05
Flavor·ECMAScript (JavaScript)
Use this Regex for server-side validation also with some slight modifications like so for .NET -- @\w+(-+.']\w+)@\w+([-.]\w+)\.[a-zA-Z0-9]{2,6}([-.{2,6})*;
Submitted by Fred Scales
-2

Name/Surname

Created·2015-10-17 08:00
Flavor·ECMAScript (JavaScript)
Regex to constrain a text to have at least 2 strings. Compatible with 2nd-3rd-Nth names/surnames.
Submitted by BigL
-2

search all special characters

Created·2015-10-14 23:02
Flavor·ECMAScript (JavaScript)
no description available
Submitted by rlynjb
-2

SQL Injection

Created·2015-10-14 10:15
Flavor·ECMAScript (JavaScript)
SQL injection regEx pattern
Submitted by Darshan Patil
-2

Prosed OFX DateTimeType pattern for v.2.1.1+

Created·2015-09-06 02:10
Flavor·Python
no description available
Submitted by Oleg Sakharov karpuscul@gmail.com
-2

SQL Comment

Created·2015-08-22 08:27
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

Validation of code ATECO Italian

Created·2015-08-19 12:09
Flavor·Python
/* -- This is a RegEx for validating one Italian ATECO code. -- For original specification visit: http://www.istat.it/it/archivio/17888 -- Valid: */ 1 01 01.2 01.02 01.02.3 01.02.03 // Not Valid: a asc 0123 012.3 013.456 123456 01/02/03
Submitted by Marco Tonchella with the help of this Comunity that thanks a lot.
-2

domain name

Created·2015-08-17 05:19
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

Date Validation

Created·2015-08-12 19:23
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

find mp3 file

Created·2015-08-02 09:27
Flavor·ECMAScript (JavaScript)
find mp3 file embeded in a link
Submitted by ogerly
-2

Word ending with colon

Created·2015-07-20 19:03
Flavor·ECMAScript (JavaScript)
no description available
Submitted by hj
-2

filter

Created·2015-07-18 07:55
Flavor·Python
no description available
Submitted by anonymous
-2

checklists item

Created·2015-07-15 13:25
Flavor·Python
checklists item
Submitted by Tobias Hochgürtel
-2

finds the instance of two or more repeating letters

Created·2015-07-10 19:34
Flavor·Python
no description available
Submitted by cp0153
-2

twitter usernames

Created·2015-07-10 11:15
Flavor·Python
no description available
Submitted by anonymous
-2

Date format regex for ddMMMyyyy

Created·2015-07-09 20:33
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

twitter ids

Created·2015-06-29 21:13
Flavor·ECMAScript (JavaScript)
no description available
Submitted by jaybill
-2

Match words in a string

Created·2015-06-24 18:55
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

Twitter Date format

Created·2015-06-19 18:44
Flavor·ECMAScript (JavaScript)
no description available
Submitted by hjgabrielsen
-2

IPv4

Created·2015-06-19 13:07
Flavor·Python
allows for all legal IPv4 addresses
Submitted by anonymous
-2

UK (Europe) DateTime

Created·2015-06-17 16:59
Flavor·ECMAScript (JavaScript)
Validates input to match UK Date Time standard
Submitted by Bascoder
-2

cron expression

Created·2015-06-16 12:40
Flavor·ECMAScript (JavaScript)
This is a relaxed cron validation, meaning that any valid cron expression should pass this; but not anything that passes regex validation is a good cron expression. Used as preliminary validation in web ui. Supports all special characters. Includes seconds field.
Submitted by enlait
-2

String with 1 lowercase 1 uppercase & 1 digit

Created·2015-06-16 11:18
Flavor·ECMAScript (JavaScript)
Regular expression for a validating a string with following rules: at least one lowercase letter at least one upper case letter at least one digit length between 6 and 14 ^(?=.\d)(?=.[a-z])(?=.*[A-Z]).{6,14}$
Submitted by Rasmita Dash
-2

Host and domains

Created·2015-06-10 18:44
Flavor·Python
no description available
Submitted by anonymous
-2

Check syntax port ACL VNG

Created·2015-06-07 19:35
Flavor·ECMAScript (JavaScript)
no description available
Submitted by nguyenvq
-2

Detect HTML Linebreak Tags

Created·2015-06-04 10:18
Flavor·ECMAScript (JavaScript)
Detect various possible HTML linebreak tags (eg. )
Submitted by @benhodgson

Community Library Entry

1

Regular Expression
Created·2024-06-20 11:53
Updated·2025-04-23 11:27
Flavor·PCRE2 (PHP)

/
(?<=\=).+?((?=\t)|(?=\n))
/
gm
Open regex in editor

Description

RegEX: (?<==).+?((?=\t)|(?=\n)) -- positive Lookbehind szuka znaku '=' na początku -- .+? -- zaznacza: . matches any character (except for line terminators) +? matches the previous token between one and unlimited times, as few times as possible, expanding as needed (lazy) -- positive Lookahead szuka znaku <tabulator: \t> | lub | <new_line: \n>

Submitted by Piotr Osada