Regular Expressions 101

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Community Patterns

1

Switzerland UID id

PCRE (PHP <7.3)
matches the Swiss government's UID id for enterprises
Submitted by marcel - 11 years ago
0

decimal numbers

PCRE (PHP <7.3)
match decimal numbers with sign
Submitted by mariano_dm - 11 years ago
-2

Filter IP from beggin of log

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

email

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
-2

email

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
11

Address Check Validation

PCRE (PHP <7.3)
Check for true or false street address format
Submitted by Dilip Borad - 11 years ago
1

Replaces odd number of quotes with even number of quotes.

PCRE (PHP <7.3)
no description available
Submitted by ingredient_15939 - 11 years ago
-2

Get text between quotes (ignore escaped ones)

PCRE (PHP <7.3)
http://stackoverflow.com/a/171499/1519058
Submitted by Enissay - 11 years ago
3

date time

Python
1/Jul/2013 03:27:12
Submitted by himel - 11 years ago
2

the the

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
0

help me please

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

Find common version names in filenames

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

code bracket parser

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 11 years ago
0

adding space after (.) period and next word

ECMAScript (JavaScript)
Requirement was to check if there is space between . and next text and if not the then add space
Submitted by Prajkta - 11 years ago
2

US Postal Code

ECMAScript (JavaScript)
refactor
Submitted by jay johnson - 11 years ago
3

mm/dd/yyyy Date

ECMAScript (JavaScript)
no description available
Submitted by jay johnson - 11 years ago
0

Phone area code - prefix - number

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
1

SSN

ECMAScript (JavaScript)
no description available
Submitted by jay johnson - 11 years ago
-2

non-negative integer

ECMAScript (JavaScript)
repeat ... refactor
Submitted by jay johnson - 11 years ago
1

non negative integers

ECMAScript (JavaScript)
no description available
Submitted by jay johnson - 11 years ago
1...893894895896897...900

Community Library Entry

4

Regular Expression
Recommended
PCRE (PHP <7.3)

/
^(?'MAJOR'0|(?:[1-9]\d*))\.(?'MINOR'0|(?:[1-9]\d*))\.(?'PATCH'0|(?:[1-9]\d*))(?:-(?'prerelease'(?:0|(?:[1-9A-Za-z-][0-9A-Za-z-]*))(?:\.(?:0|(?:[1-9A-Za-z-][0-9A-Za-z-]*)))*))?(?:\+(?'build'(?:0|(?:[1-9A-Za-z-][0-9A-Za-z-]*))(?:\.(?:0|(?:[1-9A-Za-z-][0-9A-Za-z-]*)))*))?$
/
gm
Open regex in editor

Description

Semantic Versioning regex pattern according to Tom Preston-Werner

http://semver.org/ https://github.com/mojombo/semver/blob/master/semver.md

First version of this regex follows semver 2.0.0.

Discussion of semver and this regex was posted on https://github.com/mojombo/semver.org/issues/59

Submitted by @gvlx <Gerardo Lisboa> - 10 years ago