Regular Expressions 101

Pro

Positive Lookbehind(?<=^| )

1st Alternative^

^start of line

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

\*?optionally matches the literal * (42₁₀ / 52₈ / 2A₁₆)

\w+any word character, repeated at least once

\*?optionally matches the literal * (42₁₀ / 52₈ / 2A₁₆)

Positive Lookahead(?=$| )

1st Alternative$

$end of line

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

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

Regular Expression

(?<=^| )\*?\w+\*?(?=$| )

New

ALLOW

*string* test
*string 123
string* test
string abc

DENY

*str*ing* abc *string**
*str*ing 123 *str*ing
str*ing* str*ing*
str*ing *string**
*string** *string**

Extraction

ALLOW

*string* test
*string 123
string* test
string abc

DENY

*str*ing* abc *string**
*str*ing 123 *str*ing
str*ing* str*ing*
str*ing *string**
*string** *string**