Regular Expressions 101

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Community Patterns

10

RFC 3987 compliant URL regex

ECMAScript (JavaScript)
This is a JavaScript port of the URL regex from http://stackoverflow.com/a/190405/384062 that includes a bug fix and some optimization. Mathias Bynens's Regenerate was used to convert unicode escapes. Bug fix: Eliminated stray | falsely allowing querystring to contain | ...
Submitted by Hans Meyer - 9 years ago
11

UUID

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 10 years ago
10

MikroTik FireWall

PCRE (PHP <7.3)
Regex used in Splunk to extract fields from Mikrotik FW. NOTES: Mikrotik must be configured to use "BSD Syslog" format FW rules must add, as log prefix, the action: drop accep...
Submitted by HappyIdeasMaker - 9 years ago
8

repeat group match

Python
no description available
Submitted by anonymous - 9 years ago
10

If-Then-Else Conditionals

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
5

ipv6 Validation

PCRE (PHP <7.3)
Handle all condition for ipv6 example: 1) FE80::8329 2) FE80::FFFF:8329 3) FE80::B3FF:FFFF:8329 4) FE80::0202:B3FF:FFFF:8329...
Submitted by Lim Yew Teck, Nicholas - 9 years ago
10

money: either 0 or 2 dp

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
11

IPv4 Validator

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 4 years ago (Last modified a year ago)
13

CSS Color Matcher

ECMAScript (JavaScript)
Pattern matching and extracting color code formats using RegEx. https://github.com/Kyza/color-regex/
Submitted by Kyza - a year ago
5

Youtube ID matcher

ECMAScript (JavaScript)
Credit: https://gist.github.com/FinalAngel/1876898
Submitted by anonymous - 11 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
6

Split address line into street name and house number

PCRE (PHP <7.3)
This regular expression splits an address line like for example "1117 Franklin Blvd" into the street name and house number. It also supports addresses where street name and house number are the other way around (e.g. "Mustermannstr. 1"). Furthermore, this regular expression also supports address lin...
Submitted by Andre Wisplinghoff - 10 years ago
9

English date in "dd mmmm yyyy" format

Python
Parse an English date following the "dd mmmm yyyy" format.
Submitted by Tantale - 10 years ago
5

MAC address

ECMAScript (JavaScript)
a mac address separated by dashes or colons.
Submitted by anonymous - 9 years ago
11

youtube url match

ECMAScript (JavaScript)
extract video id, index, play list id from youtube url
Submitted by anonymous - 9 years ago
6

Email with + symbol

ECMAScript (JavaScript)
email that accepts the plus (+) symbol
Submitted by luckcheese - 9 years ago
10

entity

Python
no description available
Submitted by anonymous - 9 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 - 9 years ago
7

Split quotes and single words

ECMAScript (JavaScript)
Find " and ' quoted strings and "orphaned"/single words in a string
Submitted by LoveIsGrief - 11 years ago
5

Accept url without www

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
1...45678...901

Community Library Entry

0

Regular Expression
Python

r"
^(?P<scheme>http(?:s)?:\/\/)?(?P<www>www\d?\.)?(?P<domain>\b(?!www\d?\.)[a-z\d\-]+(?:\.[a-z\d\-]{2,})+)(?P<port>:\d{1,5})?(?P<path>\/(?:[-a-zA-Z0-9._~!$&\'()*+,;=:@]|%[0-9a-fA-F]{2})*)*(?P<query_fragm>[?#&][\/\_\-\&\%\?\#\+\=\.:a-zA-Z\d]*)*$
"
gm
Open regex in editor

Description

Matches in python valid urls (excludes some edge cases), but pretty good to verify an URL before scraping it

Submitted by anonymous - a year ago (Last modified a year ago)