Regular Expressions 101

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Community Patterns

0

LaTeX - Nonspaced operators

PCRE (PHP <7.3)
Find nonspaced operators with capturing groups to reformat correctly.
Submitted by Dave - 9 years ago
0

JSON Validator

PCRE (PHP <7.3)
Complete (recursive) JSON validation regular expression.
Submitted by @Erutan409 - 9 years ago
0

Date Parser

Python
Parses date in (Month Day Year) format with delimiting chars being -\/ or whitespace
Submitted by Awk - 9 years ago
0

Validation for SEPA-XML-Text

ECMAScript (JavaScript)
This RegEx checks if a text is valid for a SEPA-XML-File. It should be helpfull if you want to implement payment information to your site and don´t wont to get into trouble with char conversion that is done by your bank.
Submitted by anonymous - 9 years ago
0

Phone number

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
0

Add xml:space to file

PCRE (PHP <7.3)
no description available
Submitted by Yu Tang - 9 years ago
0

camelCase

PCRE (PHP <7.3)
no description available
Submitted by Danno - 9 years ago
0

my regex for multiline

Python
multiline input with tagged
Submitted by Ali GÖREN - 9 years ago
0

^[a-zA-Z_\-]+$

PCRE (PHP <7.3)
Check no space
Submitted by anonymous - 9 years ago
0

OSI Key

PCRE (PHP <7.3)
no description available
Submitted by Mike LeBlanc - 9 years ago
0

tmutil regex ID

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
0

WB

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
0

WB

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
0

a

PCRE (PHP <7.3)
a
Submitted by a - 9 years ago
0

Arabic diacritics matching تحديد التشكيل العربي

ECMAScript (JavaScript)
It will match all Arabic diacritics in Arabic text, its useful to remove diacritics and to replace it with some css.
Submitted by Emad Ghaly - 9 years ago
0

y

PCRE (PHP <7.3)
all less jpg
Submitted by w - 9 years ago
0

test

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
0

Find an exact phrase only if it is within a certain number of chars.

PCRE (PHP <7.3)
Find an exact phrase (with each space and character in its own place) only if it is within the first 40 characters of the entire sentence. Useful to search non-standard phrases in log files.
Submitted by RicardoSPimentel - 9 years ago
0

url validator

PCRE (PHP <7.3)
no description available
Submitted by Briareos - 9 years ago
0

Website URL

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
1...4142434445...900

Community Library Entry

0

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

This looks to attempt to validate email addresses per the RFC. I don't know how accurate it is.

Submitted by anonymous - 9 years ago