Regular Expressions 101

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Community Patterns

4

Get stuff inside <a> tags

PCRE (PHP <7.3)
Get stuff inside tags, which are between certain words
Submitted by Jerry - 11 years ago
1

Get inside single/double quotes

PCRE (PHP <7.3)
Get everything inside single/double quotes and ignoring escaped ones
Submitted by Jerry - 11 years ago
3

SQL select columns

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

regex on paintkits

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
2

Basic Phone Number Verification

PCRE (PHP <7.3)
Verifies a phone number
Submitted by anonymous - 11 years ago
1

Parse DateTimes

PCRE (PHP <7.3)
Will parse a DateTime and group the results. Probably pretty limited but it works for me.
Submitted by martin - 11 years ago
29

Wrap long string to spec length

PCRE (PHP <7.3)
no description available
Submitted by fullpipe - 11 years ago
4

Prime number regex

PCRE (PHP <7.3)
no description available
Submitted by originally "Abigail", comp.lang.perl.misc - 11 years ago
1

Twitter Hashtags

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

Twitter Hashtags

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
3

Match quoted strings, ignoring escaped quotes

PCRE (PHP <7.3)
Matches single or double quoted strings, and ignores backslash-escaped quotes within the string.
Submitted by Maddingue - 11 years ago
6

Repair unquoted HTML attribute values

PCRE (PHP <7.3)
Usually MSWord HTML exports
Submitted by Ka. - 11 years ago
8

Validate Base64 single-line string

PCRE (PHP <7.3)
no description available
Submitted by ka. - 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. - 12 years ago
0

DateTime: DD-MM-YYYY HH:mm:ss

PCRE (PHP <7.3)
Validate and Capture (in 1000-2999 range) Leap-Year Correct
Submitted by anonymous - 12 years ago
-18

dd-mm-YYYY HH:mm:ss (year range 1000-2999)

PCRE (PHP <7.3)
Validate Gregorian calendar dates that contain 24-hour times. This will also correctly match the Feb 29 date when it falls on a valid leap year. Leap years occur every 4 years, with one exception: when a year is evenly divisible by 100 but not evenly divisible by 400, the year will not be a leap ye...
Submitted by Ka. - 12 years ago (Last modified a year ago)
2

js function test

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 12 years ago
4

1st TSV

PCRE (PHP <7.3)
no description available
Submitted by DynV - 12 years ago
1

Table Purgatory

PCRE (PHP <7.3)
A regex to find all nowrap text occurrences and name all the groups involved in preparation for a replacement pass
Submitted by Joe Hacobian - 12 years ago
4

Strip out domain extensions except for Microsoft .net technologies.

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 12 years ago
1...899900901902

Community Library Entry

1

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)$
/
gx
Open regex in editor

Description

Match any email, according to the grammer in RFC 5322, found at http://tools.ietf.org/html/rfc5322

Submitted by Nikita Popov - 11 years ago