Regular Expressions 101

Pro

^start of line

Negative Lookahead(?!.*admin)

.*any character (except for line terminators), repeated any number of times

adminthe literal text admin (case sensitive)

Group 1(.*?)

.*?any character (except for line terminators), repeated any number of times

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

$end of line

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

Regular Expression

^(?!.*admin)(.*?)\/?$

New

index
index/
admin
admin/
somehting
something/
something/foo/bar/
something/foo/baz
admin/edit.html
administration/index.html
user887/admin/index.shtml

Substitution

/\1/

index
index/
admin
admin/
somehting
something/
something/foo/bar/
something/foo/baz
admin/edit.html
administration/index.html
user887/admin/index.shtml