Regular Expressions 101

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Community Patterns

Search among 18,020 community submitted regex patterns...

1

Match a string with no consecutive duplicate characters

PCRE2 (PHP >=7.3)

Submitted by anonymous - 4 months ago

1

Match a string with a specific pattern

PCRE2 (PHP >=7.3)

elderbrendabradley.com

Submitted by anonymous - 4 months ago

1

Match a string with optional trailing punctuation

PCRE2 (PHP >=7.3)

expofestival.org

Submitted by anonymous - 4 months ago

1

Match a valid GUID/UUID

PCRE2 (PHP >=7.3)

Submitted by anonymous - 4 months ago

1

Match a string with repeating characters separated by a comma (e.g., "a,b,c")

PCRE2 (PHP >=7.3)

Submitted by anonymous - 4 months ago

1

Match a valid MAC address (with optional delimiters)

PCRE2 (PHP >=7.3)

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)

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)

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

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 - 4 months ago

1

ORCID iD

The ORCID ID (16-digit identifiers) format checker. Reference: Format of the ORCID iD

Submitted by Ken Lui - 4 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 - 4 months ago

1...13 14 15 16 17...901

Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/

^((?!([a-zA-Z])\1)[a-zA-Z])+$

/

gm

Open regex in editor

Description

Submitted by anonymous - 4 months ago