Regular Expressions 101

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Community Patterns

1

vozuskia (cs/sk)

Java 8
Addes a non-breaking space after any of the letters included in the [vozuskia] class.
Submitted by Manuel Souto Pico - 6 days ago
1

url_validation_url_doğrulama

ECMAScript (JavaScript)
^ - This signifies the start of the expression. https?:// - This matches either "http://" or "https://". (www.)? - This makes the "www." subdomain optional. [A-z0-9]+ - This matches one or more alphanumeric characters for the domain name. . - This matches a literal period character. [A-z0-9]+ - This...
Submitted by Emre Yıldırım - 9 days ago
1

Timestamp Regex

ECMAScript (JavaScript)
matches a timestamp that is in the format of Aug 14, 2024, 10:12 AM or month shortcode followed by day, year, time in 12 hours
Submitted by astro - 17 days ago
1

german date era with tolerance: n. Chr. or v. Chr. / n. Ztr of v. Ztr

ECMAScript (JavaScript)
Maches german era notations in date "v. Chr" and "v. Ztr" It is meant to be tolerant : periods and spaces are optional, and it is case insensitive
Submitted by Olivier CHEVET - 17 days ago
1

Split Docker image into image name, tag and digest with all optional

Golang
Splits a Docker image string into the separate parts: image, tag, digest tag and digest are optional
Submitted by Roemer - 22 days ago
1

E-mail pattern for html input.

ECMAScript (JavaScript)
Simply e-mail pattern for html tag.
Submitted by KsaR99 - 23 days ago
1

Simple but powerful email

ECMAScript (JavaScript)
"/" - start of regular expression "^" - anchor to beginning of string Group: [a-z0-9]+ "[a-z0-9]" - Latin character or digit "+" - occurring ONE or more times...
Submitted by Diableros [https://github.com/Diableros] - 24 days ago (Last modified 23 days ago)
1

ObjAction(\s+\=|\=)(\s+\[|\[).*?\;

ECMAScript (JavaScript)
asdad
Submitted by anonymous - a month ago (Last modified 8 days ago)
2

**japanese text** to bold <b>japanese text</b>

PCRE (PHP <7.3)
japanese text to bold japanese text 食べるんだ 食べるんだ
Submitted by kurokuroshii - a month ago (Last modified a month ago)
1

Instagram hashtag regex

ECMAScript (JavaScript)
Simple and easy regex to find valid IG hastags in a string
Submitted by Navanshu Rastogi - Febnik - a month ago (Last modified a month ago)
1

RFC3339 Validator

PCRE (PHP <7.3)
RFC3339 Validator
Submitted by anonymous - a month ago (Last modified a month ago)
1

HTML attributes

ECMAScript (JavaScript)
Find specific HTML attributes
Submitted by Joseph R. - a month ago
1

match a collection of usernames after tag 'users:' and between '[...]' and separated by commas

ECMAScript (JavaScript)
self explainatory title, usernames array must not contain any exotic character besides ,
Submitted by Lagoffre - 2 months ago
1

match a username after 'user:'

ECMAScript (JavaScript)
self explainatory title, username must not contain any exotic character.
Submitted by Lagoffre - 2 months ago
1

match time offset from timezone offset string

ECMAScript (JavaScript)
match offset from utc offset string returned by the timeZoneName property of an Intl.DateTimeFormat object. (see MDN documentation here)
Submitted by Lagoffre - 2 months ago (Last modified 2 months ago)
1

Birth date check format yyyy-mm-dd

ECMAScript (JavaScript)
Start from 1900-01-01
Submitted by anonymous - 2 months ago
1

Best birth date check

ECMAScript (JavaScript)
Format YYYY-MM-JJ
Submitted by anonymous - 2 months ago
1

Next.js middleware config matcher regex

ECMAScript (JavaScript)
Next.js middleware config matcher regex ~ https://nextjs.org/docs/app/building-your-application/routing/middleware#matcher ~ https://nextjs.org/docs/app/api-reference/file-conventions/middleware#config-object-optional Public - skip middleware /api/auth/*...
Submitted by iki - 2 months ago
1

changelog

ECMAScript (JavaScript)
changelog
Submitted by alexsio nau - 3 months ago
1

Automod - Discord scam invitations

PCRE (PHP <7.3)
Matches variations of messages commonly used to send Discord scams/hacks. Instructions are written for YAGPDB
Submitted by paiuxfluens - 3 months ago
123...653

Parsing browser User Agents

27

Regular Expression
PCRE (PHP <7.3)

/
(?(DEFINE) (?P<ver>\d+(?:\.\d+)*(?![.\d])) (?P<agent>Mozilla\/(?&ver)) (?P<os>(?&os_windows)|(?&os_linux)|(?&os_macintosh)|(?&os_ios)) (?P<os_windows>Windows[ ]\w+[ ](?&ver)) (?P<os_linux>Linux(?:[ ](?:i686|x86_64))?) (?P<os_macintosh>Macintosh) (?P<os_ios>(?:CPU[ ])?iPhone[ ]OS|CPU[ ]OS.*?like[ ]Mac[ ]OS[ ]X) (?P<device>(?&device_ios)|(?&device_firefox)|(?&device_android)) (?P<device_ios>iPhone|iPad) (?P<device_firefox>Mobile) (?P<device_android>Android(?:[ ](?&ver))?) (?P<browser> (?: (?&browser_ie) | (?&browser_safari) | (?&browser_chrome) | (?&browser_chromium) | (?&browser_firefox) | (?&browser_version) # | (?&browser_nexus) | (?&browser_mobile) | (?&browser_gsa) | (?&browser_quicklook) | (?&browser_opera) ) [ \/] (?: [A-Z\d]+\b(?!\.) | (?&ver) ) ) (?P<browser_safari>(?:Mobile[ ])?Safari) (?P<browser_chrome>Chrome) (?P<browser_chromium>\b\w+\b[ ]Chromium) (?P<browser_firefox>Firefox) (?P<browser_ie>MSIE) (?P<browser_version>Version) (?P<browser_nexus>Nexus[ ]\d+[ ]Build) (?P<browser_mobile>Mobile) (?P<browser_gsa>GSA) (?P<browser_quicklook>QuickLook) (?P<browser_opera>OPR) ) ^ (?:(?=.*?(?P<Agent>(?&agent)))) (?:(?=.*?(?P<OS>(?&os)))) (?:(?=.*?(?P<Device>(?&device))))? (?:(?=.*?(?P<Browser>(?&browser)(?:[ ](?&browser))*)))?
/
gmx
Open regex in editor

Description

From a (fairly large) list of User Agent strings, extract the OS, Browser, and Device Type.

Submitted by OnlineCop - 10 years ago (Last modified a year ago)