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Community Patterns

485

regex101.com permalink id grabber

Created·2013-12-12 13:09
Updated·2024-04-11 14:32
Flavor·PCRE (Legacy)
Grabs the ID for the regex101.com permalink code. If a revision number is provided, grab that as well.
Submitted by chris mccoy
238

Matching email addresses per RFC5322

Created·2013-10-23 17:46
Flavor·PCRE (Legacy)
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
41

URL regexp

Created·2013-01-14 17:52
Flavor·PCRE (Legacy)
A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.
Submitted by Matthew O'Riordan
19

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

Created·2013-05-17 13:07
Flavor·PCRE (Legacy)
Recommended·
Validate and capture dateTime parts, includes validation for leap years, range 1000-2999. Fixed bug
Submitted by Ka.
35

http://

Created·2014-03-26 06:44
Flavor·PCRE (Legacy)
no description available
Submitted by Mitus M.
53

Disorted Email Addresses

Created·2013-01-16 14:11
Flavor·PCRE (Legacy)
Matches distorted email addresses and converts them back to real ones.
Submitted by dislick
18

Email validation

Created·2014-09-16 13:45
Flavor·PCRE (Legacy)
no description available
Submitted by tutsplus.com
16

Alphanumeric Regex

Created·2015-06-15 13:57
Flavor·PCRE (Legacy)
no description available
Submitted by Deepan
4

Phone number

Created·2015-06-23 19:15
Flavor·PCRE (Legacy)
no description available
Submitted by Mark Landry
26

match valid JSON

Created·2014-11-17 20:47
Flavor·PCRE (Legacy)
Matches any valid JSON object, matches recursively. Passes all JSON test cases I found.
Submitted by Mateon1
23

userName

Created·2015-06-06 08:00
Flavor·PCRE (Legacy)
1-15 alphanumeric login name
Submitted by gsanchezc
29

CSV line parsing

Created·2014-10-15 13:22
Flavor·PCRE (Legacy)
Captures all fields from a CSV file's line. Can be customized with user-defined field separator and protecting character.
Submitted by Various
31

ninite

Created·2015-09-29 11:28
Flavor·PCRE (Legacy)
no description available
Submitted by peek
13

URL Validator

Created·2014-09-24 08:41
Flavor·PCRE (Legacy)
Validates - URLs with schemes - http, https and ftp Relative URL starting with / and ../
Submitted by anonymous
29

Wrap long string to spec length

Created·2013-07-21 20:34
Flavor·PCRE (Legacy)
no description available
Submitted by fullpipe
9

Youtube ID match

Created·2013-11-28 13:30
Flavor·PCRE (Legacy)
This regex will match any Youtube video ID thrown at it and return one capturing group containing the ID.
Submitted by Jacob Overgaard
3

Match quoted strings, ignoring escaped quotes

Created·2013-06-26 14:28
Flavor·PCRE (Legacy)
Matches single or double quoted strings, and ignores backslash-escaped quotes within the string.
Submitted by Maddingue
22

UK Postcode Checker

Created·2014-10-21 08:23
Flavor·PCRE (Legacy)
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 space and separates the two parts into groups.
Submitted by MaffooBristol
13

regex101.com id grabber

Created·2014-08-19 16:10
Flavor·PCRE (Legacy)
grabs the ID for the regex101.com permalink to code
Submitted by chris mccoy
37

best youtube id match ( iframe embed replace ready )

Created·2019-03-12 16:17
Flavor·PCRE (Legacy)
Recommended·
MATCH ANY YOUTUBE ID author : mi-ca v1.0 – 2017.03.08 This Regex match any youtube url and grab the ID. Embed ready √ -- `http://www.youtube.com/watch?v=vpiMAaPTze8 http://youtu.be/l_la5XiQJdk http://youtu.be/NLqAF9hrVbY https://youtu.be/qT47KF5pvfw https://youtu.be/zImHyTyYhM8?t=4s http://www.youtube.com/v/NLqAF9hrVbY?fs=1&hl=en_US http://www.youtube.com/v/NLqAF9hrVbY?fs=1&hl=en_US http://www.youtube.com/watch?v=NLqAF9hrVbY http://www.youtube.com/user/Scobleizer#p/u/1/1p3vcRhsYGo http://www.youtube.com/ytscreeningroom?v=NRHVzbJVx8I http://www.youtube.com/sandalsResorts#p/c/54B8C800269D7C1B/2/PPS-8DMrAn4 http://gdata.youtube.com/feeds/api/videos/NLqAF9hrVbY http://www.youtube.com/watch?v=spDj54kf-vY&feature=g-vrec http://www.youtube.com/watch?v=spDj54kf-vY&feature=youtu.be http://www.youtube-nocookie.com/watch?v=NLqAF9hrVbY http://www.youtube.com/embed/NLqAF9hrVbY https://www.youtube.com/embed/NLqAF9hrVbY https://www.youtube.com/watch?v=MRl7cxSOXdU&feature=youtu.be https://www.youtube.com/watch?v=q07SQFmL4rM https://www.youtube.com/watch?v=q07SQFmL4yM https://www.youtube.com/watch?time_continue=4&v=zImHyTyYhM8 http://www.youtube.com/embed/dQw4w9WgXcQ ... http://www.youtube.com/watch?v=dQw4w9WgXcQ ... http://www.youtube.com/?v=dQw4w9WgXcQ ... http://www.youtube.com/v/dQw4w9WgXcQ ... http://www.youtube.com/e/dQw4w9WgXcQ ... http://www.youtube.com/user/username#p/u/11/dQw4w9WgXcQ ... http://www.youtube.com/sandalsResorts#p/c/54B8C800269D7C1B/0/dQw4w9WgXcQ ... http://www.youtube.com/watch?feature=player_embedded&v=dQw4w9WgXcQ ... http://www.youtube.com/?feature=player_embedded&v=dQw4w9WgXcQ ... https://www.youtube.com/watch?v=DFYRQ_zQ-gk&feature=featured https://www.youtube.com/watch?v=DFYRQ_zQ-gk http://www.youtube.com/watch?v=DFYRQ_zQ-gk //www.youtube.com/watch?v=DFYRQ_zQ-gk www.youtube.com/watch?v=DFYRQ_zQ-gk https://youtube.com/watch?v=DFYRQ_zQ-gk http://youtube.com/watch?v=DFYRQ_zQ-gk //youtube.com/watch?v=DFYRQ_zQ-gk youtube.com/watch?v=DFYRQ_zQ-gk https://m.youtube.com/watch?v=DFYRQ_zQ-gk http://m.youtube.com/watch?v=DFYRQ_zQ-gk //m.youtube.com/watch?v=DFYRQ_zQ-gk m.youtube.com/watch?v=DFYRQ_zQ-gk https://www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US http://www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US //www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US https://www.youtube.com/embed/DFYRQ_zQ-gk?autoplay=1 https://www.youtube.com/embed/DFYRQ_zQ-gk http://www.youtube.com/embed/DFYRQ_zQ-gk //www.youtube.com/embed/DFYRQ_zQ-gk www.youtube.com/embed/DFYRQ_zQ-gk https://youtube.com/embed/DFYRQ_zQ-gk http://youtube.com/embed/DFYRQ_zQ-gk //youtube.com/embed/DFYRQ_zQ-gk youtube.com/embed/DFYRQ_zQ-gk https://youtu.be/DFYRQ_zQ-gk?t=120 https://youtu.be/DFYRQ_zQ-gk http://youtu.be/DFYRQ_zQ-gk //youtu.be/DFYRQ_zQ-gk youtu.be/DFYRQ_zQ-gk https://www.youtube.com/watch?v=DFYRQ_zQ-gk&feature=featured https://www.youtube.com/watch?v=DFYRQ_zQ-gk http://www.youtube.com/watch?v=DFYRQ_zQ-gk //www.youtube.com/watch?v=DFYRQ_zQ-gk www.youtube.com/watch?v=DFYRQ_zQ-gk https://youtube.com/watch?v=DFYRQ_zQ-gk http://youtube.com/watch?v=DFYRQ_zQ-gk //youtube.com/watch?v=DFYRQ_zQ-gk youtube.com/watch?v=DFYRQ_zQ-gk https://m.youtube.com/watch?v=DFYRQ_zQ-gk http://m.youtube.com/watch?v=DFYRQ_zQ-gk //m.youtube.com/watch?v=DFYRQ_zQ-gk m.youtube.com/watch?v=DFYRQ_zQ-gk https://www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US http://www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US //www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US www.youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US youtube.com/v/DFYRQ_zQ-gk?fs=1&hl=en_US https://www.youtube.com/embed/DFYRQ_zQ-gk?autoplay=1 https://www.youtube.com/embed/DFYRQ_zQ-gk http://www.youtube.com/embed/DFYRQ_zQ-gk //www.youtube.com/embed/DFYRQ_zQ-gk www.youtube.com/embed/DFYRQ_zQ-gk https://youtube.com/embed/DFYRQ_zQ-gk http://youtube.com/embed/DFYRQ_zQ-gk //youtube.com/embed/DFYRQ_zQ-gk youtube.com/embed/DFYRQ_zQ-gk https://youtu.be/DFYRQ_zQ-gk?t=120 https://youtu.be/DFYRQ_zQ-gk http://youtu.be/DFYRQ_zQ-gk //youtu.be/DFYRQ_zQ-gk youtu.be/DFYRQ_zQ-gk https://www.youtube.com/HamdiKickProduction?v=DFYRQ_zQ-gk `
Submitted by mi-ca.ch
37

Cron schedule

Created·2016-06-02 15:45
Flavor·PCRE (Legacy)
Recommended·
Validate cron lines (even the ones commented out)
Submitted by anonymous
11

Date(Including Leap Year) YYYY-MM-DD hh:mm:ss

Created·2014-03-14 16:49
Flavor·PCRE (Legacy)
Validates DateTime of format YYYY-MM-DD hh:mm:ss including Leap Year
Submitted by Madhan
0

URL matching

Created·2014-07-02 06:34
Flavor·PCRE (Legacy)
Complete url matching with storage of various parameters
Submitted by hjpotter92
20

Between tags content

Created·2015-10-24 10:52
Flavor·PCRE (Legacy)
no description available
Submitted by Agustín Bouillet
1

Validate alphanumeric and numeric range

Created·2014-09-22 09:13
Flavor·PCRE (Legacy)
For Validating alphanumeric and numeric range
Submitted by anonymous
32

Parsing browser User Agents

Created·2015-01-23 16:47
Updated·2023-07-19 08:36
Flavor·PCRE (Legacy)
From a (fairly large) list of User Agent strings, extract the OS, Browser, and Device Type.
Submitted by OnlineCop
9

only numbers

Created·2015-11-26 16:19
Flavor·PCRE (Legacy)
A string with only numbers in
Submitted by Gotts
13

PHP variable name

Created·2013-02-05 09:18
Flavor·PCRE (Legacy)
Valid PHP variable name as defined in the manual at http://php.net/manual/en/language.variables.basics.php
Submitted by Erin Millard
18

Date Regex(DD/MM/yyyy)

Created·2015-08-26 06:25
Flavor·PCRE (Legacy)
no description available
Submitted by alcaamado
17

Capture comma separated numbers

Created·2015-07-19 01:57
Flavor·PCRE (Legacy)
Capture comma separated numbers, no matter if there are spaces before or after the commas.
Submitted by Fernando Nunes
15

IPv4

Created·2015-12-17 08:14
Flavor·PCRE (Legacy)
no description available
Submitted by robwa
6

Matching balanced parens, brackets, and braces

Created·2013-09-29 18:23
Flavor·PCRE (Legacy)
no description available
Submitted by Noah Luck Easterly
13

Match Gmail Email

Created·2014-11-20 23:58
Flavor·PCRE (Legacy)
Recommended·
Match Gmail Email
Submitted by Óscar Enríquez
6

json

Created·2014-08-14 17:30
Flavor·PCRE (Legacy)
{1:aa,2:bb,3:"aa:bb"}
Submitted by suat & umut
11

Address Check Validation

Created·2014-01-30 13:56
Flavor·PCRE (Legacy)
Check for true or false street address format
Submitted by Dilip Borad
0

utf-8 language

Created·2015-09-15 13:13
Flavor·PCRE (Legacy)
this regex is support for all languages
Submitted by Jigar Dhaduk
12

Remove Special Ascii Characters from unicode String

Created·2015-03-12 11:00
Flavor·PCRE (Legacy)
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
8

Validate Base64 single-line string

Created·2013-05-31 00:35
Flavor·PCRE (Legacy)
no description available
Submitted by ka.
1

IP Addresses

Created·2015-07-16 16:42
Flavor·PCRE (Legacy)
Matches IP Addresses with minimum false positives
Submitted by Austin-Hanson
4

Element's Attribute Value in XML (simple)

Created·2014-06-24 11:29
Flavor·PCRE (Legacy)
Simple regular expression for extracting attribute value of the element in XML-string. Attribute value should be in quotes.
Submitted by Nikita Danilov
15

RFC3339 DateTime

Created·2016-02-12 11:44
Flavor·PCRE (Legacy)
Recommended·
Validates a RFC3339 DateTime format. Does not validates the Data
Submitted by anonymous
5

Separate words (works with spaces, dashes and underscores)

Created·2014-10-07 17:30
Flavor·PCRE (Legacy)
no description available
Submitted by marcoslhc
4

Remove HTML tags

Created·2014-10-01 08:36
Flavor·PCRE (Legacy)
This regex is used to remove HTML tag on string
Submitted by Jordane BACHELET
6

Username:Password

Created·2015-07-12 06:50
Flavor·PCRE (Legacy)
Regex For finding username:password
Submitted by Ghost
10

Strip Email ID from Name

Created·2014-11-24 22:41
Flavor·PCRE (Legacy)
Use this regex to select all characters up to the "" bracket. It works across multiple lines. You can get an email list with only the IDs. This is the pattern it matches: Alpha Person Step 1 (.*) $ Step 2 [$.$ gives you aperson@whatever.org
Submitted by Jonathan Davidar
8

Date time Advanced

Created·2013-12-03 19:19
Flavor·PCRE (Legacy)
no description available
Submitted by Mr.Neutro
8

Alphanumeric and Spaces

Created·2015-08-22 06:46
Updated·2023-07-20 10:55
Flavor·PCRE (Legacy)
Alow alphanumeric characters and spaces
Submitted by JTN
4

Credit Card Number

Created·2015-06-04 15:07
Flavor·PCRE (Legacy)
Validates Credit Card Numbers of different type. Supports Visa, MasterCard, American Express, Diners Club, Discover and JCB Taken from http://www.regular-expressions.info/creditcard.html If you want to support only a particular type, customise it based on following. ^(?:40-9]{12}(?:[0-9]{3})? # Visa | 5[1-5{14} # MasterCard | 347{13} # American Express | 3(?:00-5]|[68)[0-9]{11} # Diners Club | 6(?:011|5[0-9]{2})[0-9]{12} # Discover | (?:2131|1800|35\d{3})\d{11} # JCB )$
Submitted by Ehsan
11

Codice fiscale

Created·2015-08-19 10:43
Flavor·PCRE (Legacy)
Check "codice fiscale"
Submitted by Luca
6

reg Ex number range check

Created·2014-05-22 06:48
Flavor·PCRE (Legacy)
Hi, I am trying to get a reg ex that will test a number range and also allow european number convention like , for decimal point. I have this one for range check - ^(4-9{3}|1-9{4,5}|12{6}|30-4{5}|3500000)$ and I have this one for allow comma ^\s?([\d\.]+(\,\d{1,2})?|\,\d{1,2})\s$ but I need a combination of both, Thanks if you can help
Submitted by TimJ

Community Library Entry

238

Regular Expression
Created·2013-10-23 17:46
Flavor·PCRE (Legacy)

/
(?(DEFINE) (?<addr_spec> (?&local_part) @ (?&domain) ) (?<local_part> (?&dot_atom) | (?&quoted_string) | (?&obs_local_part) ) (?<domain> (?&dot_atom) | (?&domain_literal) | (?&obs_domain) ) (?<domain_literal> (?&CFWS)? \[ (?: (?&FWS)? (?&dtext) )* (?&FWS)? \] (?&CFWS)? ) (?<dtext> [\x21-\x5a] | [\x5e-\x7e] | (?&obs_dtext) ) (?<quoted_pair> \\ (?: (?&VCHAR) | (?&WSP) ) | (?&obs_qp) ) (?<dot_atom> (?&CFWS)? (?&dot_atom_text) (?&CFWS)? ) (?<dot_atom_text> (?&atext) (?: \. (?&atext) )* ) (?<atext> [a-zA-Z0-9!#$%&'*+\/=?^_`{|}~-]+ ) (?<atom> (?&CFWS)? (?&atext) (?&CFWS)? ) (?<word> (?&atom) | (?&quoted_string) ) (?<quoted_string> (?&CFWS)? " (?: (?&FWS)? (?&qcontent) )* (?&FWS)? " (?&CFWS)? ) (?<qcontent> (?&qtext) | (?&quoted_pair) ) (?<qtext> \x21 | [\x23-\x5b] | [\x5d-\x7e] | (?&obs_qtext) ) # comments and whitespace (?<FWS> (?: (?&WSP)* \r\n )? (?&WSP)+ | (?&obs_FWS) ) (?<CFWS> (?: (?&FWS)? (?&comment) )+ (?&FWS)? | (?&FWS) ) (?<comment> \( (?: (?&FWS)? (?&ccontent) )* (?&FWS)? \) ) (?<ccontent> (?&ctext) | (?&quoted_pair) | (?&comment) ) (?<ctext> [\x21-\x27] | [\x2a-\x5b] | [\x5d-\x7e] | (?&obs_ctext) ) # obsolete tokens (?<obs_domain> (?&atom) (?: \. (?&atom) )* ) (?<obs_local_part> (?&word) (?: \. (?&word) )* ) (?<obs_dtext> (?&obs_NO_WS_CTL) | (?&quoted_pair) ) (?<obs_qp> \\ (?: \x00 | (?&obs_NO_WS_CTL) | \n | \r ) ) (?<obs_FWS> (?&WSP)+ (?: \r\n (?&WSP)+ )* ) (?<obs_ctext> (?&obs_NO_WS_CTL) ) (?<obs_qtext> (?&obs_NO_WS_CTL) ) (?<obs_NO_WS_CTL> [\x01-\x08] | \x0b | \x0c | [\x0e-\x1f] | \x7f ) # character class definitions (?<VCHAR> [\x21-\x7E] ) (?<WSP> [ \t] ) ) ^(?&addr_spec)$
/
xmg
Open regex in editor

Description

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