Regular Expressions 101

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Community Patterns

2

Number or Range

ECMAScript (JavaScript)
Allows either a number (e.g. "1", "1.01") or a range (e.g. "1-2", "1.0 - 1.3"). Also allows whitespace on either side of the numbers.
Submitted by Mark Newcomb - 8 years ago
2

.*(\d+).* Selects last number

Python
no description available
Submitted by anonymous - 8 years ago
2

Test numeric input to be between 0,01 and 100,00

ECMAScript (JavaScript)
Tests a numeric input to be between 0,00 < input <= 100,00. Decimals are optional but have at max 2 places.
Submitted by Torsten Walter - 8 years ago
2

Regex Shortcode

PCRE (PHP <7.3)
Check shortcode
Submitted by khiconit - 8 years ago
2

IP Address

PCRE (PHP <7.3)
IPv4 Address Input
Submitted by anonymous - 8 years ago
2

Eircode

PCRE (PHP <7.3)
Eircode validation for new postcodes identifiers in Republic of Ireland. Case-insensetive for easier user input. Added optional space separator to follow same pattern as in UK post codes and in examples used in eircode spec.
Submitted by Arek Jaworski - 8 years ago
2

Match multiline comments /* ... */

PCRE (PHP <7.3)
It won't match single line comments like this one: //* This comment won't be match */ ^ see the double / Works in PHP without the g modifier.
Submitted by SimonaHalep - 8 years ago
2

CSS @media selector

ECMAScript (JavaScript)
Matches a CSS @media selector, matches outer {} curly brackets, works with every CSS code, minified too.
Submitted by emd4 - 8 years ago
2

php naming convension (classes, vars, functions, constants)

PCRE (PHP <7.3)
PHP Basic coding standard Naming Convension pattern: /^\pL_*$/
Submitted by Najmuddeen Mohammed - 8 years ago
2

Palindrome

ECMAScript (JavaScript)
Captures a palindrome of 9 digits or less
Submitted by anonymous - 8 years ago
2

foder add prefix

ECMAScript (JavaScript)
auto prefix ("/") to folder
Submitted by anonymous - 8 years ago
2

domain for Google Data Studio (re2 dialect)

Golang
Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want
Submitted by anonymous - 8 years ago
2

IPv4 dotted decimal

ECMAScript (JavaScript)
This regexp was written for Regex Tuesday Challenge - Week Six.
Submitted by anonymous - 8 years ago
2

Ansible Host Var checking

Python
We had an issue where the "hosts=some_var" value could cause mass deployments if the wrong value was passed through. Specifically a comma with nothing surrounding it (i.e. "hosts=,"). This regex will allow us to fail when certain characters are present.
Submitted by anonymous - 8 years ago
2

check name

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
2

URL parser

PCRE2 (PHP >=7.3)
The best way to parse URL via Regex. This can be used in javascript, PHP, etc.
Submitted by Ivijan-Stefan Stipic - 8 years ago (Last modified a year ago)
2

Re Twitts

ECMAScript (JavaScript)
find retwitt hashtag on Twitters and add a label to highlight it.
Submitted by anonymous - 7 years ago
2

Re Twitts

ECMAScript (JavaScript)
find retwitt hashtag on Twitters and add a label to highlight it.
Submitted by anonymous - 7 years ago
2

Iranian birth date

PCRE (PHP <7.3)
Iranian birth date aka tarikh tavalod تاریخ تولد ایرانی ها
Submitted by ehsanJamalian - 7 years ago
2

shenasname code

PCRE (PHP <7.3)
Iranian identity code aka shenasname code شماره شناسنامه ایرانی ها
Submitted by ehsanJamalian - 7 years ago
1...873874875876877...900

Community Library Entry

2

Regular Expression
Java 8

"
^(((\d{3}[1-9]|\d{2}[1-9]\d|\d[1-9]\d{2}|[1-9]\d{3})(\/)(((0[13578]|1[02])(\/)(0[1-9]|[12]\d|3[01]))|((0[469]|11)(\/)(0[1-9]|[12]\d|30))|(02(\/)(0[1-9]|[1]\d|2[0-8]))))|(((\d{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))(\/)02(\/)29))$
"
gm
Open regex in editor

Description

^(((\d{3}[1-9]|\d{2}[1-9]\d|\d[1-9]\d{2}|[1-9]\d{3})(/)(((0[13578]|1[02])(/)(0[1-9]|[12]\d|3[01]))|((0[469]|11)(/)(0[1-9]|[12]\d|30))|(02(/)(0[1-9]|[1]\d|2[0-8]))))|(((\d{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))(/)02(/)29))$

Match year/month/day, date format. E.g: 2021/08/25 [match] 2021/09/30 [match] 2018/02/28 [match] 2024/02/29 [match] 2023/02/29 [mismatch]

Submitted by mayl0421 - 3 years ago