Regular Expressions 101

Explanation

Pro

^start of line

Negative Lookahead(?!.*(.)\1\1)

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

Group 1(.)

.any character (except for line terminators)

\1the text saved by group 1

Positive Lookahead(?=.*?[A-Z])

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

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Positive Lookahead(?=.*?[a-z])

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

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Positive Lookahead(?=.*?[0-9])

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

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Positive Lookahead(?=.*?[.\-!?§$%&])

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

Character Class[.\-!?§$%&]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

§the literal § (167₁₀ / 247₈ / A7₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

.{8,}any character (except for line terminators), repeated at least 8 times

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

$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

^(?!.*(.)\1\1)(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[.\-!?§$%&]).{8,}.*$

New

Foo01-bar
Fooo01-bar
Feo01-bar
Foo01baar
Foo.-baar
Fo0-B4r