Regular Expressions 101

Pro

^start of line

.any character (except for line terminators)

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)

.any character (except for line terminators)

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)

.any character (except for line terminators)

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)

.any character (except for line terminators)

Positive Lookahead(?=.*[@#$,.].)

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

Character Class[@#$,.]

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

.any character (except for line terminators)

.{6,}any character (except for line terminators), repeated at least 6 times

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

^.(?=.*[a-z].)(?=.*[A-Z].)(?=.*[0-9].)(?=.*[@#$,.].).{6,}$

New

abA0@67
abA0@6
abA0@678
abA0at678

0$1

abA0@67
abA0@6
abA0@678
abA0at678