Regular Expressions 101

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Community Patterns

0

Cédula de identidad venezolana

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
0

Full URL regex

ECMAScript (JavaScript)
regex to valid a complete URL including querystring and URI encoded characters
Submitted by anonymous - 8 years ago
0

wordpress customizer array with momentJs timezones

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Input -> rules

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Remove codes

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Roman numerals

PCRE (PHP <7.3)
Verify the form of the Roman numbers 1 - 9.
Submitted by anonymous - 8 years ago
0

match html attributes

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Parsing HTML Player file

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

DEFI

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Yii2 infopath

PCRE (PHP <7.3)
for yii2 Infopath
Submitted by anonymous - 8 years ago
0

mark up chinese sentence

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

markdown chapter

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Find HTML anchor tag <a> without href attribute

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Extract SERP

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Inerface from policer

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

YouTube embed iframe

PCRE (PHP <7.3)
Checked for 200+ tags
Submitted by anonymous - 8 years ago
0

Validate camelCase

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

names

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
0

Brace matching for ( and ) parens

PCRE (PHP <7.3)
Escaped characters should be ignored, hence \( and \) should not affect braces.
Submitted by anonymous - 8 years ago
0

Swap items in formula

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
1...34567...902

Community Library Entry

4

Regular Expression
PCRE (PHP <7.3)

/
^(M{0,3})(C(?:D|M)|D?C{0,3})(X(?:L|C)|L?X{0,3})(I(?:V|X)|V?I{0,3})$
/
Open regex in editor

Description

Detects valid Roman numerals (up to 3999), and splits into 4 capture groups: thousands, hundreds, tens, and units.

Submitted by Terence Linnell - 9 years ago