Regular Expressions 101

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Community Patterns

12

Find Reddit Threads

Python
Simply searches for the thread-id in any kind of valid reddit-URL.
Submitted by Mio - 10 years ago
12

Remove Special Ascii Characters from unicode String

PCRE (PHP <7.3)
By Using this string you can just remove ascii special characters from a unicode string characters like ♥♥♥♥ ▓▒ and other non unicode letters.
Submitted by Hummad Hassan - 10 years ago
13

PHP variable name

PCRE (PHP <7.3)
Valid PHP variable name as defined in the manual at http://php.net/manual/en/language.variables.basics.php
Submitted by Erin Millard - 12 years ago
13

regex101.com id grabber

PCRE (PHP <7.3)
grabs the ID for the regex101.com permalink to code
Submitted by chris mccoy - 10 years ago
13

URL Validator

PCRE (PHP <7.3)
Validates - URLs with schemes - http, https and ftp Relative URL starting with / and ../
Submitted by anonymous - 10 years ago
13

Match Gmail Email

Recommended
PCRE (PHP <7.3)
Match Gmail Email
Submitted by Óscar Enríquez - 10 years ago
14

RFC3339 DateTime

Recommended
PCRE (PHP <7.3)
Validates a RFC3339 DateTime format. Does not validates the Data
Submitted by anonymous - 9 years ago
15

IPv4

PCRE (PHP <7.3)
no description available
Submitted by robwa - 9 years ago
16

Alphanumeric Regex

PCRE (PHP <7.3)
no description available
Submitted by Deepan - 9 years ago
17

Capture comma separated numbers

PCRE (PHP <7.3)
Capture comma separated numbers, no matter if there are spaces before or after the commas.
Submitted by Fernando Nunes - 9 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. - 12 years ago
18

Email validation

PCRE (PHP <7.3)
no description available
Submitted by tutsplus.com - 10 years ago
18

Date Regex(DD/MM/yyyy)

PCRE (PHP <7.3)
no description available
Submitted by alcaamado - 9 years ago
20

Between tags content

PCRE (PHP <7.3)
no description available
Submitted by Agustín Bouillet - 9 years ago
22

UK Postcode Checker

PCRE (PHP <7.3)
Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional spac...
Submitted by MaffooBristol - 10 years ago
23

userName

PCRE (PHP <7.3)
1-15 alphanumeric login name
Submitted by gsanchezc - 10 years ago
23

best youtube id match ( iframe embed replace ready )

Recommended
PCRE (PHP <7.3)
MATCH ANY YOUTUBE ID author : mi-ca v1.0 – 2017.03.08 This Regex match any youtube url and grab the ID. Embed ready √ --...
Submitted by mi-ca.ch - 6 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
27

Parsing browser User Agents

PCRE (PHP <7.3)
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)
29

Wrap long string to spec length

PCRE (PHP <7.3)
no description available
Submitted by fullpipe - 11 years ago
1...580581582583

Community Library Entry

52

Regular Expression
PCRE (PHP <7.3)

/
^(?'Username'[-\w\d\.]+?)(?:\s+at\s+|\s*@\s*|\s*(?:[\[\]@]){3}\s*)(?'Domain'[-\w\d\.]*?)\s*(?:dot|\.|(?:[\[\]dot\.]){3,5})\s*(?'TLD'\w+)$
/
gm
Open regex in editor

Description

Matches distorted email addresses and converts them back to real ones.

Submitted by dislick - 12 years ago