Regular expressions pcre2 · Quantifiers, groups and alternation
Ignore case
Match hello in any case. Many tools use an i flag instead.
(?i)hello
Official Regular expressions pcre2 documentation
More quantifiers, groups and alternation commands
- Repeat a pattern
- Match as little as possible
- Match one of several options
- Capture parts of a match
- Group without capturing
- Name a capture group
All quantifiers, groups and alternation commands · Regular expressions pcre2 cheatsheet