Regular Expressions 101

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Community Patterns

483

regex101.com permalink id grabber

PCRE (PHP <7.3)
Grabs the ID for the regex101.com permalink code. If a revision number is provided, grab that as well.
Submitted by chris mccoy - 11 years ago (Last modified 7 months ago)
237

Matching email addresses per RFC5322

PCRE (PHP <7.3)
The BNF rules from RFC 5322 transformed to PCRE by Nikita Popov and described in the post http://nikic.github.io/2012/06/15/The-true-power-of-regular-expressions.html.
Submitted by Michael Musson - 11 years ago
106

ECMAScript/JavaScript trim

ECMAScript (JavaScript)
Trim leading and trailing whitespace from a string.
Submitted by fp - 11 years ago (Last modified 2 months ago)
73

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 - 11 years ago (Last modified a year ago)
40

URL regexp

PCRE (PHP <7.3)
A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.
Submitted by Matthew O'Riordan - 12 years ago
18

Date: DD-MM-YYYY hh:mm:ss

Recommended
PCRE (PHP <7.3)
Validate and capture dateTime parts, includes validation for leap years, range 1000-2999. Fixed bug
Submitted by Ka. - 11 years ago
87

Password Validation

ECMAScript (JavaScript)
Checks that a password has a minimum of 6 characters, at least 1 uppercase letter, 1 lowercase letter, and 1 number with no spaces.
Submitted by Christian Klemp - 9 years ago
35

http://

PCRE (PHP <7.3)
no description available
Submitted by Mitus M. - 11 years ago
52

Disorted Email Addresses

PCRE (PHP <7.3)
Matches distorted email addresses and converts them back to real ones.
Submitted by dislick - 12 years ago
6

Password

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago (Last modified a year ago)
31

Email address (most used)

ECMAScript (JavaScript)
Email address, most used cases
Submitted by Jago - 9 years ago
34

Google like regex

ECMAScript (JavaScript)
Attempts to mimic Google search box behavior, returning an array with the separated search strings (that keep the +/- indicator for following operations)
Submitted by mettjus - 10 years ago
18

Email validation

PCRE (PHP <7.3)
no description available
Submitted by tutsplus.com - 10 years ago
16

Alphanumeric Regex

PCRE (PHP <7.3)
no description available
Submitted by Deepan - 9 years ago
4

Phone number

PCRE (PHP <7.3)
no description available
Submitted by Mark Landry - 9 years ago
14

Phone Number

ECMAScript (JavaScript)
Allows phone numbers with optional country code, optional special characters and whitespace
Submitted by Tlmader - 9 years ago
26

match valid JSON

PCRE (PHP <7.3)
Matches any valid JSON object, matches recursively. Passes all JSON test cases I found.
Submitted by Mateon1 - 10 years ago
16

Password

ECMAScript (JavaScript)
Safe Password that allow only with a number, a lowercase, a uppercase, and a special character
Submitted by davidlondono - 10 years ago
23

userName

PCRE (PHP <7.3)
1-15 alphanumeric login name
Submitted by gsanchezc - 9 years ago
28

CSV line parsing

PCRE (PHP <7.3)
Captures all fields from a CSV file's line. Can be customized with user-defined field separator and protecting character.
Submitted by Various - 10 years ago
123...779

Community Library Entry

0

Regular Expression
Python

r"
(P\w+)\W(P\w+)
"
gm
Open regex in editor

Description

Python program to match if two words from a list of words starting with letter 'P'.

Submitted by anonymous - 2 years ago