Regular Expressions 101

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Community Patterns

5

Password strength

ECMAScript (JavaScript)
Regular expression for password validation Rules: 8-120 chars no spaces must contain at least one a-z char must contain at least one A-Z char...
Submitted by @razvanz - 9 years ago
5

ipv6

PCRE (PHP <7.3)
Match an ipv6 address
Submitted by Frusty - 9 years ago
5

North American Phone Number

ECMAScript (JavaScript)
Validate North American phone numbers with capture groups for the Area Code, Exchange Code, Line Number, and Extension.
Submitted by AaronBoots - 8 years ago
9

only numbers

PCRE (PHP <7.3)
A string with only numbers in
Submitted by Gotts - 9 years ago
9

Youtube ID match

PCRE (PHP <7.3)
This regex will match any Youtube video ID thrown at it and return one capturing group containing the ID.
Submitted by Jacob Overgaard - 11 years ago
8

Validate Base64 single-line string

PCRE (PHP <7.3)
no description available
Submitted by ka. - 11 years ago
6

search word with an accent

ECMAScript (JavaScript)
search any word with an accent
Submitted by Thegner Pierre - 9 years ago
6

HTML tag stripper

PCRE (PHP <7.3)
This regex will identify all html start and end tags.
Submitted by anonymous - 9 years ago
7

split URL into location-resource-params (JavaScript)

ECMAScript (JavaScript)
Extract resource location, name and query parameters from a URL (JavaScript version)
Submitted by cebence - 11 years ago
8

Extract Protocol, URL, URL Path, get parameters and hash from URI

Python
This is simplified from my last submission.
Submitted by Dale O'Brien - 11 years ago
4

Phone number

PCRE (PHP <7.3)
no description available
Submitted by Mark Landry - 9 years ago
3

SQL select columns

PCRE (PHP <7.3)
no description available
Submitted by Phan - 11 years ago
3

Task 2, part 1

PCRE (PHP <7.3)
Finds all source numbers in square brackets
Submitted by Kovalev Evgeny - 11 years ago
3

how to match both lines?

Python
f_name may contain spaces, numbers, characters,... so I would go for a but then I couldn't use [...]? anymore to match the second line?
Submitted by anonymous - 10 years ago
3

Find URLs in markdown where the lines have been wrapped

Python
no description available
Submitted by anonymous - 10 years ago
3

TimezoneOffset

ECMAScript (JavaScript)
parses timezones in the format -08:00 or -8:0
Submitted by Neha Kadam - 10 years ago
3

URL with matching categories

PCRE (PHP <7.3)
Finds the protocol, subdomain, ((domain, extension)/ipaddress), port, filepath (split in path and filename), the route and the query string.
Submitted by fps - 10 years ago
3

Smart Target Blank

ECMAScript (JavaScript)
Allow you to check if the JavaScript location.pathname is a link required adding a target="_blank".
Submitted by Bruno Lesieur - 10 years ago
3

Request mask idea

ECMAScript (JavaScript)
Do you like apis and nodejs as I do?, then this must be for you, have you noticed that all the famous apis have a common functionality? the ability to request partial responses with masks, so if you have a friend list you may want to return only a few fields you know just in case. You will end up re...
Submitted by Marco Villarreal<erick.slayer.m.v@gmail.com> - 10 years ago
3

PL Phone number

PCRE (PHP <7.3)
PL Phone number
Submitted by Dawid - 10 years ago
1...7891011...901

Community Library Entry

5

Regular Expression
PCRE (PHP <7.3)

/
^([[:xdigit:]]{1,4}(?::[[:xdigit:]]{1,4}){7}|::|:(?::[[:xdigit:]]{1,4}){1,6}|[[:xdigit:]]{1,4}:(?::[[:xdigit:]]{1,4}){1,5}|(?:[[:xdigit:]]{1,4}:){2}(?::[[:xdigit:]]{1,4}){1,4}|(?:[[:xdigit:]]{1,4}:){3}(?::[[:xdigit:]]{1,4}){1,3}|(?:[[:xdigit:]]{1,4}:){4}(?::[[:xdigit:]]{1,4}){1,2}|(?:[[:xdigit:]]{1,4}:){5}:[[:xdigit:]]{1,4}|(?:[[:xdigit:]]{1,4}:){1,6}:)$
/
gm
Open regex in editor

Description

Match an ipv6 address

Submitted by Frusty - 9 years ago