regex101: PCRE (Legacy) Match Workspace

Pro

^start of line

Positive Lookahead(?=.{8,12}$)

.{8,12}any character (except for line terminators), repeated between 8 and 12 times

$end of line

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

Negated Character Class[^A-Z]*

*matches any number of characters outside the set below:

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

Character Class[A-Z]

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

Positive Lookahead(?=\D*\d)

\D*any character that's not a digit, repeated any number of times

\da digit

Positive Lookahead(?=(?:[^a-z]*[a-z]){3})

Non-Capturing Group(?:[^a-z]*[a-z]){3}

{3}repeats the group contents below exactly 3 times:

Negated Character Class[^a-z]*

*matches any number of characters outside the set below:

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

Character Class[a-z]

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

Positive Lookahead(?=[^\s#*.!?$]*[#*.!?$])

Negated Character Class[^\s#*.!?$]*

*matches any number of characters outside the set below:

\sany whitespace character

#the literal # (35₁₀ / 43₈ / 23₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

Character Class[#*.!?$]

#the literal # (35₁₀ / 43₈ / 23₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

Negative Lookahead(?!.*(.)\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

Non-Capturing Group(?:[a-z]|[A-Z])

1st Alternative[a-z]

Character Class[a-z]

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

2nd Alternative[A-Z]

Character Class[A-Z]

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

Character Class[a-zA-Z0-9#*.!?$,]+

+matches at least one character from the set below:

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

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

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

#the literal # (35₁₀ / 43₈ / 23₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

$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

25 tokens

Regular Expression

^(?=.{8,12}$)(?=[^A-Z]*[A-Z])(?=\D*\d)(?=(?:[^a-z]*[a-z]){3})(?=[^\s#*.!?$]*[#*.!?$])(?!.*(.)\1)(?:[a-z]|[A-Z])[a-zA-Z0-9#*.!?$,]+$

New

Abcd123!,
Abcd123!,
abcD123!,dfe

abcD123,dfe
abcD122!,dfe