^start of line
Group 1(WSPRD2\b.*\r?\n(?:(?!END\b).*\r?\n)*) WSPRD2the literal text WSPRD2 (case sensitive) \ban ASCII word boundary
.*any character (except for line terminators), repeated any number of times
\r?optionally matches a carriage return (ASCII 13)
\na line-feed (newline) character (ASCII 10)
Non-Capturing Group(?:(?!END\b).*\r?\n)* *repeats the group contents below any number of times:
Negative Lookahead(?!END\b) ENDthe literal text END (case sensitive) \ban ASCII word boundary
.*any character (except for line terminators), repeated any number of times
\r?optionally matches a carriage return (ASCII 13)
\na line-feed (newline) character (ASCII 10)
.*any character (except for line terminators), repeated any number of times
\ban ASCII word boundary
DELESTATthe literal text DELESTAT (case sensitive) \ban ASCII word boundary
.*any character (except for line terminators), repeated any number of times
\r?optionally matches a carriage return (ASCII 13)
\na line-feed (newline) character (ASCII 10)
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