Regular Expressions 101

(?m)applies the following effective flags to the remainder of the pattern: mg

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

^start of line

\-{4}the literal - (45₁₀ / 55₈ / 2D₁₆) , repeated exactly 4 times

Character Class[\r\n]

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group 1([\s\S]+?(?=^\-{4}[\r\n]))

Character Class[\s\S]+?

+?matches at least one character from the set below:

\sany whitespace character

\Sany non-whitespace character

Positive Lookahead(?=^\-{4}[\r\n])

^start of line

\-{4}the literal - (45₁₀ / 55₈ / 2D₁₆) , repeated exactly 4 times

Character Class[\r\n]

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

^start of line

\-{4}the literal - (45₁₀ / 55₈ / 2D₁₆) , repeated exactly 4 times

Character Class[\r\n]

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?m)^\-{4}[\r\n]([\s\S]+?(?=^\-{4}[\r\n]))^\-{4}[\r\n]

New


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  fff
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 df123 dsfds
ggdg fsdf
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dfdsfds
gfsdf

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