Regular Expressions 101

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

.*any Unicode 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(?=.*[A-Z])

.*any Unicode 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(?=.*[0-9])

.*any Unicode 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(?=.*\W)

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

\Wany character that is not a Unicode word character

^start of line

.+any Unicode character (except for line terminators), repeated at least once

$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.

Search reference

Regular Expression

(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*\W)^.+$

New

abCD99$%
CD99ab$%
#c7F
missingDigits(%^*&%
missing_upper_case34857634578$#%^$%^
MISSING_LOWER_#%^#$^&#$%3234234_CASE