Regular Expressions 101

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Community Patterns

-2

Twitter Date format

ECMAScript (JavaScript)
no description available
Submitted by hjgabrielsen - 9 years ago
-2

Expression that does not include a subexpression

PCRE (PHP <7.3)
Pattern that matches all expression that not include a subexpression. The subexpression could be replaced by a string.
Submitted by aquintas - 9 years ago
-2

Parse all adresses in href

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
-2

username in url

PCRE (PHP <7.3)
should start with letter follow by letters and numbers and (-) - zero or more can't start or finish with (-) can't have two or more consecutive (-) char
Submitted by Ali Azmoude - 9 years ago
-2

twitter ids

ECMAScript (JavaScript)
no description available
Submitted by jaybill - 9 years ago
-2

Select the numeric part of a price following an ascii dollar sign

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
-2

JSON KEY VALUE

PCRE (PHP <7.3)
Get key value in json string
Submitted by Marcio Paiva Barbosa - 9 years ago
-2

twitter usernames

Python
no description available
Submitted by anonymous - 9 years ago
-2

filter

Python
no description available
Submitted by anonymous - 9 years ago
-2

Word ending with colon

ECMAScript (JavaScript)
no description available
Submitted by hj - 9 years ago
-2

Mathematical Expressions

PCRE (PHP <7.3)
ValidatesMathematical Expressions. Ignores whitespace. Includes parenthesis matching.
Submitted by Jeremy Friesen - 9 years ago
-2

HTML <script> regex

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
-2

find mp3 file

ECMAScript (JavaScript)
find mp3 file embeded in a link
Submitted by ogerly - 9 years ago
-2

Match XML that has a single root element

PCRE (PHP <7.3)
Can be used as a basic validator to ensure that XML has only a single root element
Submitted by Jerome Wilson - 9 years ago
-2

Numbers separated by comma and whitespace

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
-2

match all html tags

PCRE (PHP <7.3)
http://haacked.com/archive/2004/10/25/usingregularexpressionstomatchhtml.aspx/
Submitted by anonymous - 9 years ago
-2

SQL Comment

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
-2

match wordpress plugins [plugin_name ...]...[/plugin]

PCRE (PHP <7.3)
no description available
Submitted by chris backhouse - 9 years ago
-2

Remove updir tokens from url

PCRE (PHP <7.3)
Remove /../ recursively from urls
Submitted by santiagoarizti@gmail.com - 9 years ago
-2

LogFile Alert: Pattern 'Memory queue for message type 1: 3038' found i

PCRE (PHP <7.3)
LogFile Alert: Pattern 'Memory queue for message type 1: 3038' found in /var/log/me
Submitted by anonymous - 9 years ago
1...368369370371372...900

Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
^(?:(?:25[0-5]|2[0-4]\d|1\d{2}|\d{2}|\d)(?:\.|$)){4}\b$
/
g
Open regex in editor

Description

Validate an IPv4 address. The addresses are four numbered separated by three dots, and can only have a maximum value of 255 in either octet. Start by trying to validate 172.16.254.1.

Submitted by anonymous - a month ago