Regular Expressions 101

Pro

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

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

Group 1(MY_PROJ.*)

MY_PROJthe literal text MY_PROJ (case sensitive)

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

Group 2([\s\S]*?)

Character Class[\s\S]*?

*?matches any number of characters from the set below:

\sa Unicode whitespace character

\Sany character that is not Unicode whitespace

Positive Lookahead(?=[\n\r]MY_PROJ|\Z)

1st Alternative[\n\r]MY_PROJ

Character Class[\n\r]

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

\ra carriage return (ASCII 13)

MY_PROJthe literal text MY_PROJ (case sensitive)

2nd Alternative\Z

\Zend of string

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

(?m)^(MY_PROJ.*)([\s\S]*?)(?=[\n\r]MY_PROJ|\Z)

New

MY_PROJ10
1st line  
2nd line  

MY_PROJ11
3rd line  
4th line

MY_PROJ10
1st line  
2nd line  

MY_PROJ11
3rd line  
4th line