Standard Meta Characters
Grouping, Capturing & Constraining
- (...) - Match & capture pattern
- (?:...) - Match pattern (no capture)
- (?=...) - Positive lookahead (no capture)
- (?!...) - Negative lookahead (no capture)
Examples:
|
Birmingham(?= Perl Mongers) - Only match Birmingham Perl Mongers Birmingham(?!, Alabama) - Wont match Birmingham, Alabama |