Regular Expressions 101

Explanation

Pro

Negative Lookbehind(?<![\w*])

Character Class[\w*]

\wany word character

*the literal * (42₁₀ / 52₈ / 2A₁₆)

Non-Capturing Group(?:sh\*t|sh\*\*|f\*\*k|f\*\*\*)

1st Alternativesh\*t

shthe literal text sh (case sensitive)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

2nd Alternativesh\*\*

shthe literal text sh (case sensitive)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

3rd Alternativef\*\*k

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

kthe literal k (107₁₀ / 153₈ / 6B₁₆) (case sensitive)

4th Alternativef\*\*\*

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Negative Lookahead(?![\w*])

Character Class[\w*]

\wany word character

*the literal * (42₁₀ / 52₈ / 2A₁₆)

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?<![\w*])(?:sh\*t|sh\*\*|f\*\*k|f\*\*\*)(?![\w*])

New

Well f*** you!
Well f***!
f***
f*** this!
secret code is 123f***
f**k this!

sh*t* not?
sh*t but this
f***a this not?
f***! but this
f**** this not?

ab sh*t
ssh*t
*sh*t