Regular Expressions 101

Pro

Negative Lookbehind(?<![^\W_])

Negated Character Class[^\W_]

\Wany character that is not a Unicode word character

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

1st AlternativePA(?:TTERN|RROT)

PAthe literal text PA (case sensitive)

Non-Capturing Group(?:TTERN|RROT)

1st AlternativeTTERN

TTERNthe literal text TTERN (case sensitive)

2nd AlternativeRROT

RROTthe literal text RROT (case sensitive)

2nd AlternativeFI(?:GHT|ND)

FIthe literal text FI (case sensitive)

Non-Capturing Group(?:GHT|ND)

1st AlternativeGHT

GHTthe literal text GHT (case sensitive)

2nd AlternativeND

NDthe literal text ND (case sensitive)

3rd AlternativeMATCHING

MATCHINGthe literal text MATCHING (case sensitive)

4th AlternativeREGEX

REGEXthe literal text REGEX (case sensitive)

5th AlternativeLONG

LONGthe literal text LONG (case sensitive)

6th AlternativeTHIS

THISthe literal text THIS (case sensitive)

7th AlternativeVERY

VERYthe literal text VERY (case sensitive)

8th AlternativeWORD

WORDthe literal text WORD (case sensitive)

9th AlternativeANY

ANYthe literal text ANY (case sensitive)

10th AlternativeBY

BYthe literal text BY (case sensitive)

Negative Lookahead(?![^\W_])

Negated Character Class[^\W_]

\Wany character that is not a Unicode word character

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

(?<![^\W_])((?:PA(?:TTERN|RROT)|FI(?:GHT|ND)|MATCHING|REGEX|LONG|THIS|VERY|WORD|ANY|BY))(?![^\W_])

New

FIND ANY MATCHING WORD BY THIS VERY LONG REGEX PATTERN FIGHT FIGHTER PARROT PARROT_ING

FIND ANY MATCHING WORD BY THIS VERY LONG REGEX PATTERN FIGHT FIGHTER PARROT PARROT_ING