Regular Expressions 101

Order By

Sponsors
There are currently no sponsors. Become a sponsor today!

Community Patterns

1

Match a valid MAC address (with optional delimiters)

PCRE2 (PHP >=7.3)
techakc.com
Submitted by anonymous - 4 months ago
1

HTML Tag Matching

PCRE2 (PHP >=7.3)
downtimeonline.net
Submitted by anonymous - 4 months ago
1

HTML Tag Matching

PCRE2 (PHP >=7.3)
downtimeonline.net
Submitted by anonymous - 4 months ago
1

Hexadecimal Color Code Validation

PCRE2 (PHP >=7.3)
murdochleaks.org
Submitted by anonymous - 4 months ago
1

Strong Password Validation (at least 8 characters, one uppercase, one lowercase, one number, one special character

PCRE2 (PHP >=7.3)
corridanandco.com
Submitted by anonymous - 4 months ago
1

US Phone Number Validation (with optional country code and separators)

PCRE2 (PHP >=7.3)
unwhatever.me
Submitted by anonymous - 4 months ago
1

URL Validation

PCRE2 (PHP >=7.3)
clickthistoget.com
Submitted by anonymous - 4 months ago
1

IPv4 Address Validation

PCRE2 (PHP >=7.3)
wttmforums.com
Submitted by anonymous - 4 months ago
1

Email Validation with TLD Restriction:

PCRE2 (PHP >=7.3)
elegenttech.com
Submitted by anonymous - 4 months ago
1

Inverse attribute search on elements/components

PCRE2 (PHP >=7.3)
Finds elements/components without a specific prop/attribute
Submitted by anonymous - 4 months ago
1

RFC3339 Validator

PCRE (PHP <7.3)
RFC3339 Validator
Submitted by anonymous - 4 months ago (Last modified 4 months ago)
1

Expression for calculator`s memory

PCRE2 (PHP >=7.3)
variable should be only letters = variable almost in the memory or the value including negative
Submitted by Breathe of fate - 4 months ago
1

.NET CSV parser

.NET 7.0 (C#)
Parses CSV files using comma (,) as delimiter and double quote (") as quoted-field tag. Features: Respects empty fields, including at the beginning and at the end of the line Respects line breaks in quoted fields
Submitted by kevinhp - 5 months ago
1

ORCID iD

Python
The ORCID ID (16-digit identifiers) format checker. Reference: Format of the ORCID iD
Submitted by Ken Lui - 5 months ago
1

Operations between integers

PCRE2 (PHP >=7.3)
Detect operations between integers (12^-3) and split them into three capture groups: lhs: 12 op : ^ rhs: -3 `
Submitted by benetsugarboy - 5 months ago
1

IP address without local

.NET 7.0 (C#)
Matches IP addresses excluding local addresses
Submitted by pvl_zh - 5 months ago
1

для haproxy kuma

PCRE2 (PHP >=7.3)
начало
Submitted by anonymous - 5 months ago
1

snake_case

PCRE2 (PHP >=7.3)
snake_case
Submitted by Groupe 18 - 5 months ago (Last modified 5 months ago)
1

Catch domains

Python
Catch domains from str. Details see TEST STRING
Submitted by Casey TSui - 5 months ago
1

1 lower 1 upper 1 special char, 8 to 18 chars...

PCRE2 (PHP >=7.3)
1 lower 1 upper 1 special char, 8 to 18 chars...
Submitted by anonymous - 5 months ago
1...1415161718...902

Community Library Entry

0

Regular Expression
Python

r"
^[a-zA-Z._'~,-]+(?: +[a-zA-Z._'~,-]+)*$
"
gm
Open regex in editor

Description

Matches words (with certain special chars) and one or more spaces in between those words.

Submitted by JAVA - 9 years ago