Regular Expressions 101

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Community Patterns

4

Match Brackets and anything inside

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

saja

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
0

Dotted-decimal IPv4 address

PCRE (PHP <7.3)
Validates an IPv4 address for use as a URI host as defined in RFC-3986.
Submitted by ezzatron - 11 years ago
1

{if}{endif} matcher

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

get image with classname

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

why this matches?

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

Substitutin

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
0

negated special characters

PCRE (PHP <7.3)
no description available
Submitted by Rimjhim - 11 years ago
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
1...897898899900901902

Community Library Entry

0

Regular Expression
PCRE2 (PHP >=7.3)

/
(\d)\1+
/
gm
Open regex in editor

Description

Checks if there are repeated numbers in a number. Ex. 1223 ==> Has the number 2 repeated

Submitted by maPer77 - 3 years ago