Regular Expressions 101

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Community Patterns

0

number with or without thousands separator(.) and decimal part(,)

PCRE (PHP <7.3)
number with or without thousands separator(.) and decimal part(,) ES: 100000; 1.646; 13323,33; 3.444.434,44
Submitted by Basten - 10 years ago
9

Fixo LDN CSP e SEM CSP

PCRE (PHP <7.3)
no description available
Submitted by Marcos Müller - 10 years ago
5

URL

PCRE (PHP <7.3)
URL Description from Dr. M. G. @ Brookes
Submitted by anonymous - 10 years ago
6

search word with an accent

ECMAScript (JavaScript)
search any word with an accent
Submitted by Thegner Pierre - 9 years ago
5

HTML img

ECMAScript (JavaScript)
Grabs all HTML tags
Submitted by Pirate11 - 9 years ago
6

HTML tag stripper

PCRE (PHP <7.3)
This regex will identify all html start and end tags.
Submitted by anonymous - 9 years ago
5

password 1upper 1lower 1number 1specialcharater

ECMAScript (JavaScript)
fjk@1Qaa$
Submitted by Anuswadh - 9 years ago
10

extract subdomain(if available) or domain from URL

Python
This regex should extract the subdomain, if any, or the domain, if no subdomain is used, from an arbitrary URL
Submitted by trevi@twanda.com - 9 years ago
11

Conventional Commits validation

Python
This regex prevents the writing of non-standard conventional commits. I'm available on my github
Submitted by Krisque - 3 years ago (Last modified 3 years ago)
6

Repair unquoted HTML attribute values

PCRE (PHP <7.3)
Usually MSWord HTML exports
Submitted by Ka. - 12 years ago
3

HTML image tag src

ECMAScript (JavaScript)
Capture src attribute of HTML image tags
Submitted by Simon Altschuler - 11 years ago
-2

Remove empty HTML tags

PCRE (PHP <7.3)
Removes empty HTML tags. Was needed for old input clean-up and to keep a HTML parses from crashing. Looking for improvement on bottom test.
Submitted by R. Sartorius - 11 years ago
1

IPv4&IPv6 URL validation regular expression

PCRE (PHP <7.3)
no description available
Submitted by Henry Li - 11 years ago
8

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 - 11 years ago
2

Date validator for mm/dd/yy

ECMAScript (JavaScript)
no description available
Submitted by Dheeraj Khushalani - dotnetguy.net - 10 years ago
3

UK Postcode Checker

PCRE (PHP <7.3)
This is an improvement of the very good tH9mQ1/1. It did not pickup on the first two postcodes found here: //http://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom
Submitted by Flexander - 10 years ago
5

Two or more whitespace

PCRE (PHP <7.3)
Reeplace all two or more whitespace in string with a single chararter(ej. one whitespace)
Submitted by Lanxe - 10 years ago
4

utf-8 hex.

PCRE (PHP <7.3)
utf-8 hex. code armenian. Firs character regexp
Submitted by Dyxx - 10 years ago
7

rsyslog test

PCRE (PHP <7.3)
global modifier
Submitted by dtmland - 10 years ago
7

Any positive integer except zero

PCRE (PHP <7.3)
no description available
Submitted by Harsh - 9 years ago
1...56789...902

Community Library Entry

1

Regular Expression
PCRE (PHP <7.3)

/
(\d+)\s+((?:[A-Za-zA-Z0-9]{0,3})+)\s+((?:[A-Za-z0-9\)\(\]\:\/<>\[\"\.\,\+\'\-]{2,} ?)+)\s+(\d{2,7}-\d{2}-\d)
/
g
Open regex in editor

Description

grab phase/chem formula/chem name/CAS

Submitted by anonymous - 8 years ago