Regular Expressions 101

Order By

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

Community Patterns

238

Matching email addresses per RFC5322

PCRE (PHP <7.3)
The BNF rules from RFC 5322 transformed to PCRE by Nikita Popov and described in the post http://nikic.github.io/2012/06/15/The-true-power-of-regular-expressions.html.
Submitted by Michael Musson - 11 years ago
0

quoted string possibly containing escaped delimiter

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
1

bridal quality

PCRE (PHP <7.3)
no description available
Submitted by mine - 11 years ago
-1

Twitter #hashtags

Python
Using the twitter API, take a tweet object and find & link #tags to embed in HTML
Submitted by @triplec1988 - 11 years ago
1

Anom

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
0

Simple

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
1

email

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
-1

Find image style

ECMAScript (JavaScript)
style img
Submitted by anonymous - 11 years ago
3

HTML image tag src

ECMAScript (JavaScript)
Capture src attribute of HTML image tags
Submitted by Simon Altschuler - 11 years ago
0

Match quotes around words (including whitespace)

PCRE (PHP <7.3)
no description available
Submitted by Michael de Silva - 11 years ago
3

Get Nth value (3 times)

PCRE (PHP <7.3)
capture Nth character from string, 3 times
Submitted by K. - 11 years ago
2

hghdgh

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
2

Error in Refex

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
6

Matching balanced parens, brackets, and braces

PCRE (PHP <7.3)
no description available
Submitted by Noah Luck Easterly - 11 years ago
5

Youtube ID matcher

ECMAScript (JavaScript)
Credit: https://gist.github.com/FinalAngel/1876898
Submitted by anonymous - 11 years ago
4

YouTube Grabber Cleanup

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
2

takie

PCRE (PHP <7.3)
no description available
Submitted by sdfsdfdsf - 11 years ago
-1

Simple replacing. Replaced first folder in path to file.

PCRE (PHP <7.3)
Used with Java regexp. F.e. you can use replaceAll("regexp", "filePath").
Submitted by E.ch. - 11 years ago
5

Hello world !

ECMAScript (JavaScript)
no description available
Submitted by Fedir RYKHTIK - 11 years ago
2

Hello world example

PCRE (PHP <7.3)
no description available
Submitted by Fedir RYKHTIK - 11 years ago
1...898899900901902

Community Library Entry

0

Regular Expression
PCRE2 (PHP >=7.3)

/
(?<!\()[A-Z]{2,}(?!\))
/
gm
Open regex in editor

Description

Matches a sequence of 2 or more uppercase letters not surrounded by parenthesis.

Submitted by Devlin - 2 years ago