Regular Expressions 101

Pro

^start of line

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

\S*any non-whitespace character, repeated any number of times

Character Class[a-z]

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

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

\S*any non-whitespace character, repeated any number of times

Character Class[A-Z]

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

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

\S*any non-whitespace character, repeated any number of times

Character Class[0-9]

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

Positive Lookahead(?=\S*[[:punct:]|§µ¤£¨])

\S*any non-whitespace character, repeated any number of times

Character Class[[:punct:]|§µ¤£¨]

[:punct:]a punctuation character [!"#$%&'()*+,\-./:;<=>?@[\]^_`{|}~]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

§the literal § (167₁₀ / 247₈ / A7₁₆)

µthe literal µ (181₁₀ / 265₈ / B5₁₆) (case sensitive)

¤the literal ¤ (164₁₀ / 244₈ / A4₁₆)

£the literal £ (163₁₀ / 243₈ / A3₁₆)

¨the literal ¨ (168₁₀ / 250₈ / A8₁₆)

\S{8,}any non-whitespace character, repeated at least 8 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

^(?=\S*[a-z])(?=\S*[A-Z])(?=\S*[0-9])(?=\S*[[:punct:]|§µ¤£¨])\S{8,}$

aaaAAA1!
aaaAA1!
aaaAA1! 
 aaaAAA1!
aaaAAA11
aaa1111!
aaA AA1111!

aaaAAA1!
aaaAA1!
aaaAA1! 
 aaaAAA1!
aaaAAA11
aaa1111!
aaA AA1111!