Regular Expressions 101

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Community Patterns

Search among 18,040 community submitted regex patterns...

1

Match a string with alternating uppercase and lowercase letters

PCRE2 (PHP >=7.3)

loggerblogger.net

Submitted by anonymous - 4 months ago

1

Match a string with nested brackets

PCRE2 (PHP >=7.3)

loggerblogger.net

Submitted by anonymous - 4 months ago

1

Match a string with specific length and content

PCRE2 (PHP >=7.3)

loggerblogger.net

Submitted by anonymous - 4 months ago

1

Match a string with specific length and content

PCRE2 (PHP >=7.3)

loggerblogger.net

Submitted by anonymous - 4 months ago

1

Match a valid Twitter handle

PCRE2 (PHP >=7.3)

Submitted by anonymous - 4 months ago

1

Match a valid Twitter handle

PCRE2 (PHP >=7.3)

Submitted by anonymous - 4 months ago

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

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Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/

^([a-z][A-Z]|[A-Z][a-z])+$

/

gm

Open regex in editor

Description

loggerblogger.net

Submitted by anonymous - 4 months ago