Regular Expressions 101

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Community Patterns

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

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

IP address without local

Matches IP addresses excluding local addresses

Submitted by pvl_zh - 4 months ago

1

для haproxy kuma

PCRE2 (PHP >=7.3)

Submitted by anonymous - 4 months ago

1

snake_case

PCRE2 (PHP >=7.3)

Submitted by Groupe 18 - 4 months ago (Last modified 4 months ago)

1

Catch domains

Catch domains from str. Details see TEST STRING

Submitted by Casey TSui - 4 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 - 4 months ago

1

HTML attributes

ECMAScript (JavaScript)

Find specific HTML attributes

Submitted by Joseph R. - 4 months ago

1

CSS Selectors

PCRE2 (PHP >=7.3)

Captures CSS Selectors along with combinators

Submitted by Joseph R - 4 months ago

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Community Library Entry

1

Regular Expression
.NET 7.0 (C#)

@"

^(?!$)(?:(?<=^|,)(?<start>)(?<quote>"")?(?(quote)(?>[^""]|"""")+\<quote>(?<-quote>)|[^,\n]*)(?<value-start>),?)+$

"

gm

Open regex in editor

Description

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