Regular Expressions 101

Pro

^start of line

(?i)applies the following effective flags to the remainder of the pattern: gmi

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Negative Lookahead(?!foo$)

foothe literal text foo (case insensitive)

$end of line

.+any character (except for line terminators), repeated at least once

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

^(?i)(?!foo$).+

Text with foo here
foo Text
More foo
foo

Match this line

this seems to work
as does this with foo 
foofff
ffffoO

Text with foo here
foo Text
More foo
foo

Match this line

this seems to work
as does this with foo 
foofff
ffffoO