Regular Expressions 101

Explanation

Pro

^start of line

Positive Lookahead(?=[\D]*\d)

Character Class[\D]*

*matches any number of characters from the set below:

\Dany character that's not a digit

\da digit

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

Negated Character Class[^a-zA-Z]*

*matches any number of characters outside 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)

Character Class[a-zA-Z]

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

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

Positive Lookahead(?=.{6,})

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

Negative Lookahead(?!.*(\d)\1{2})

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

Group 1(\d)

\da digit

\1{2}the text saved by group 1, repeated exactly 2 times

Negative Lookahead(?!.*([a-zA-Z])(?:.*?\2){2,})

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

Group 2([a-zA-Z])

Character Class[a-zA-Z]

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

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

Non-Capturing Group(?:.*?\2){2,}

{2,}repeats the group contents below at least 2 times:

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

\2the text saved by group 2

.*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.

26 tokens

^(?=[\D]*\d)(?=[^a-zA-Z]*[a-zA-Z])(?=.{6,})(?!.*(\d)\1{2})(?!.*([a-zA-Z])(?:.*?\2){2,}).*$

New

jj112233
jkhsfsndbf8uwwe
a1234
nsds312
111aaa222
aa1aa1aa1
hbsd12
aa11bbsd
hgshsadh12
hh8uqweuu