Build, test, and debug regular expressions
Matches the literal phrase 'match that' with case insensitivity applied only within the group, catching variations like 'Match That', 'MATCH THAT', or 'match THAT'. Uses the .NET inline modifier syntax (?i:...) to scope case-insensitivity to just this portion of a larger pattern rather than the whole regex. With the global flag, it finds all occurrences of the phrase throughout the input text.