Regular Expressions 101

^start of line

Positive Lookahead(?=.*?\d)

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

\da digit

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)

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)

Character Class[A-Za-z\d]{10,}

{10,}matches at least 10 characters from the set below:

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

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

\da digit

$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

^(?=.*?\d)(?=.*?[A-Z])(?=.*?[a-z])[A-Za-z\d]{10,}$

New

foobar7678A
foobar7678
foobar4354(
43543foobaR
43543fooR