Regular Expressions 101

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Community Patterns

1

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

PCRE2 (PHP >=7.3)
unwhatever.me
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

Hexadecimal Color Code Validation

PCRE2 (PHP >=7.3)
murdochleaks.org
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

Match a valid MAC address (with optional delimiters)

PCRE2 (PHP >=7.3)
techakc.com
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)
0478.me
Submitted by anonymous - 4 months ago
1

Match a valid GUID/UUID

PCRE2 (PHP >=7.3)
hackday.tv
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 string with a specific pattern

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

Match a string with no consecutive duplicate characters

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

Match a valid Twitter handle

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

Match a valid Twitter handle

PCRE2 (PHP >=7.3)
meetiin.com
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 string with nested brackets

PCRE2 (PHP >=7.3)
loggerblogger.net
Submitted by anonymous - 4 months ago
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 date in DD-MM-YYYY format

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

Match Word Characters with Optional Hyphens

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

Match Nested Parentheses and Brackets

PCRE2 (PHP >=7.3)
memoryjarapp.com
Submitted by anonymous - 4 months ago
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Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
^[_a-z0-9]+(\.[_a-z0-9]+)*(\+[a-z0-9]+(\.[_a-z0-9]+)*)?@([a-z0-9-]+\.)+[a-z]{2,20}$
/
i
Open regex in editor

Description

The best regular expression for emails, including the + (plus) sign for every possible valid email in 2023.

Submitted by Jérôme Brunel - a year ago