Regular Expressions 101

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7

SO: fail2ban regular to find 403 request in nginx

Python
http://stackoverflow.com/q/25778420/2072035
Submitted by anonymous - 10 years ago (Last modified 9 months ago)
7

[A-Za-z\x{0600}-\x{06FF}\x{1000}-\x{1021}_-][-\w]*

PCRE (PHP <7.3)
A-Za-z\x{0600}-\x{06FF}\x{1000}-\x{1021}_-*
Submitted by [A-Za-z\x{0600}-\x{06FF}\x{1000}-\x{1021}_-][-\w]* - 9 years ago
7

TimezoneOffset

ECMAScript (JavaScript)
used to parse timezone in the format -08:00 or +05:30
Submitted by Neha - 9 years ago
7

validate US (5 & 9 digit) ZipCodes and CA PostalCodes

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
7

simple email

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
7

Extract currency with currency symbol if present

ECMAScript (JavaScript)
Extracts values of the form £nnn,nnn.nn or $nnn.nnn from text
Submitted by Simon Gardner - 9 years ago
7

Remove Widows (PHP)

PCRE (PHP <7.3)
Adds a non-breaking space between the last two words of sentences
Submitted by herkulano - 9 years ago
72

Regex for telephone numbers all over the world

Recommended
ECMAScript (JavaScript)
Detects most of the phone numbers all over the world
Submitted by Aditya Joshi - 10 years ago (Last modified 6 months ago)
36

IP Address validator

ECMAScript (JavaScript)
Validates IPv4 IP Address
Submitted by krzysp - 9 years ago
4

semver

Recommended
PCRE (PHP <7.3)
Semantic Versioning regex pattern according to Tom Preston-Werner http://semver.org/ https://github.com/mojombo/semver/blob/master/semver.md First version of this regex follows semver 2.0.0....
Submitted by @gvlx <Gerardo Lisboa> - 10 years ago
18

Date Regex(DD/MM/yyyy)

PCRE (PHP <7.3)
no description available
Submitted by alcaamado - 9 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 - 10 years ago
15

Hashtag

ECMAScript (JavaScript)
The secret of the Twitterverse.
Submitted by Joogl - 10 years ago
11

Codice fiscale

PCRE (PHP <7.3)
Check "codice fiscale"
Submitted by Luca - 9 years ago
9

Extract url GET parameters

PCRE (PHP <7.3)
Returns key/value pair of a url. Also works with google fonts which has additional information
Submitted by anonymous - 10 years ago
9

UUID

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

English date in "dd mmmm yyyy" format

Python
Parse an English date following the "dd mmmm yyyy" format.
Submitted by Tantale - 9 years ago
9

If-Then-Else Conditionals

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

money: either 0 or 2 dp

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
9

Letters, numbers and blank space

PCRE (PHP <7.3)
The following regular expression matches only letter a-z A-Z numbers 0-9 and a blank space for a given string.
Submitted by Jordan Raychev - 8 years ago
12345...879

Math evaluation

0

Regular Expression
ECMAScript (JavaScript)

/
(?:=|\$)(.*)=\s*eval
/
gm
Open regex in editor

Description

Regex for capturing LaTeX and passing it to a program, like sympy.

Submitted by anonymous - 2 years ago