Regular Expressions 101

Positive Lookbehind(?<=:keyword_start:)

:keyword_start:the literal text :keyword_start: (case sensitive)

.*?any character (except for line terminators), repeated any number of times

Positive Lookahead(?=:keyword_end:)

:keyword_end:the literal text :keyword_end: (case sensitive)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?<=:keyword_start:).*?(?=:keyword_end:)

New

This is a teststring ... :keyword_start: this   is   the content   with double   spaces :keyword_end: This is      also multiple space    but this won't be     replaced :keyword_start: this is    the     second    content   with double  spaces :keyword_end: ... more text

Regular Expression

Extraction