Regular Expressions 101

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Community Patterns

0

discord markdown

ECMAScript (JavaScript)
it checkes for discord markdown examples includes: italic bold...
Submitted by padero - 3 years ago
0

identify duplicate consecutive words + word combinations to remove

PCRE2 (PHP >=7.3)
Identifies duplicate word and word combinations that exist consecutively within a string for removal. It is currently configured for up to 3 consecutive words but can be extended by adding additional (\s+\w)* to the first groups pattern match logic use with substitution val $1 good for removing d...
Submitted by GrantO - 3 years ago
0

Discord emoji regex

ECMAScript (JavaScript)
Discod emoji regex
Submitted by Xaliks - 3 years ago
0

isNumber

PCRE2 (PHP >=7.3)
Find that given string is number or not.
Submitted by anonymous - 3 years ago
0

Password

PCRE2 (PHP >=7.3)
For password validation
Submitted by anonymous - 3 years ago
0

SysaCMS Log Scheme

PCRE (PHP <7.3)
SysaCMS (Still under development) is a php content management system.
Submitted by Shoaiyb Sysa - 3 years ago
0

My html tag regex

Python
My html tag regex
Submitted by anonymous - 3 years ago
0

Last 4 charecters

PCRE2 (PHP >=7.3)
This regex allows you to access the last 4 charecters in a string and manipulate them however you want
Submitted by anonymous - 3 years ago
0

Italian phone number regex

PCRE (PHP <7.3)
Italian phone number reg
Submitted by Ali Babayev - 3 years ago
0

Day, year and month regex

PCRE2 (PHP >=7.3)
This regex allows to match date format with the same separators
Submitted by Cymon - 3 years ago
0

Date Range Pattern

PCRE2 (PHP >=7.3)
Patternmatching of several Daterange Patterns Quarter 2021-Q2 Range...
Submitted by Stefc - 3 years ago
0

Password policy (password requires three out of the four character types)

PCRE (PHP <7.3)
A password must consist of at least fifteen characters. A password must contain a character from at least three of the following four sets: A-Z a-z 0-9 !@#$%^&*_-+=?|\/(){}[]:,.;...
Submitted by RGT, Mast - 3 years ago
0

CSS font-face rules for embedded webfonts (base64-encoded woff/woff2)

ECMAScript (JavaScript)
var FONTFACE_PATTERN = /(?:^|)(?:(?<=(?:font-family[:] ?))'"['"]|(?<=(?:font-weight[:])) ?(.+?)|(?<=(?:font-style[:])) ?(.+?)|(?<=src: ?url[(])(?:['"]?data:(.+?);,[,])(.+?)(?:['"]?[)])(?:[\n\s ]?format((\S+)'"])?)(?:;)(?:|$)/mdg Rudimentary pattern for matching base64-embedded webfonts in CSS style...
Submitted by Nicholas Berlette (@nberlette) - 2 years ago
0

Turkish Phone Number

ECMAScript (JavaScript)
It matches all phone numbers in Turkey starting with country and area code. +902121111111 +90 2121111111 +90 212 1111111 +90 212 111 1111...
Submitted by Erman Seneren - 2 years ago
0

Email

PCRE2 (PHP >=7.3)
Email
Submitted by anonymous - 2 years ago
0

HGVS RNA deletion

PCRE2 (PHP >=7.3)
This regex will match RNS deletion following hgvs nomenclature
Submitted by anonymous - 2 years ago
0

Timezone Offsets

PCRE2 (PHP >=7.3)
A regular expression for timezones offsets as of July 29, 2022, see https://en.wikipedia.org/wiki/List_of_UTC_offsets.
Submitted by Hidayatullah Ahsan - 2 years ago
0

Base64 Image Data URI finder

ECMAScript (JavaScript)
The expression is intended for finding one or more embedded Base64 Data URI in an HTML document. It will not find matches for any HTML surrounding the encoded Data URI match ( tag or src attributes), just the encoded data and MIME header, all that's needed to decode. The MIME type is for images in ...
Submitted by Attention Deficit Hyperactivity Disorder - 2 years ago (Last modified 2 years ago)
0

Email Validation

ECMAScript (JavaScript)
invalid email abc abc.com valid email address abc@mail.com...
Submitted by anonymous - 2 years ago
0

Validation of Phone Numbers including optional country code and area code

Python
numbers = ['(210) 867 5309', '+1 210.867.5309', '867-5309', '210-867-5309'] regex = r"^\(?\+?([0-9]{1,3})?[- (]?\(?([0-9]{3})?[-. )]?\(?([0-9]{3})[-. )]?\(?([0-9]{4})\)?\s?$" re.search(regex, phone_number)
Submitted by Cristina Lucin - 2 years ago
1...565566567568569...900

Community Library Entry

237

Regular Expression
PCRE (PHP <7.3)

/
(?(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 - 11 years ago