Regular Expressions 101

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

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Regular Expression
PCRE (PHP <7.3)

(?<CCT>(?:(?<=[A-Z])(?=[^A-Z]))|(?:(?<=[a-z])(?=[^a-z]))|(?:(?<=\d)(?=\D))|(?:(?<=[^A-Za-z\d])(?=[A-Za-z\d])))

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Description

\b can be replicated as (?<=\w)(?=\W)|(?<=\W)(?=\w)

Understanding how to create these class transitions can be beneficial for several reasons. In this instance, counting the results of this regex can be used to measure randomness within strings containing multiple character classes.

Submitted by @notGeorgePBurdell - 7 years ago

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Community Patterns

GEDCOM parsing experiment

GEDCOM parsing experiment

HTML - matches specific tag pairs and content between them

HTML - matches all HTML tags pairs including attributes in the tags

match all start tags including attributes in the tags

HTML - matches start tag of specific tag including attibutes

HTML - matches close part of specific tag pair

HTML - matches specific HTML tag pair including attributes in the tags.

HTML - matches start tag with specific attribute

HTML - matches start tag with specific attribute

CSS - match syntax (experimental)

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Find Translations without textdomain

* = (0 a n vezes);

+ = (1 a n vezes);

? = (0 a 1 vezes);

{3} = (Obrigatoriamente 3 vezes);

{2,} = (2 vezes ou n vezes);

{1,2} = (1 vez ou 2 vezes);

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Community Library Entry

Regular ExpressionPCRE (PHP <7.3)

Description

Regular Expression
PCRE (PHP <7.3)