Regular Expressions 101

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Community Patterns

1

Match Currency Amount with Optional Symbols

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

Match Social Security Numbers (US)

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

Match Valid Email Addresses with Local Part Length

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

Match Specific Year Format (YYYY)

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

Match String with Limited Length

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

Extract All Matches from a Text

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

Match Postal Codes (US Format)

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

Match URL with Optional Protocol

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

Extract HTML Content Between Tags

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

Match Nested Parentheses and Brackets

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 a date in DD-MM-YYYY format

PCRE2 (PHP >=7.3)
memoryjarapp.com
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 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)
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 no consecutive duplicate characters

PCRE2 (PHP >=7.3)
kickflix.net
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
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Community Library Entry

1

Regular Expression
Python

r"
-?(?:\d+(?:\.\d+)?|\.\d+)(?:e\d+)?
"
g
Open regex in editor

Description

for correctly parsing numbers in SVG attributes like path d or viewBox with regex

  • v2: added support for scientific notation
Submitted by riedler - 3 months ago (Last modified 2 months ago)