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-zA-Z])

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

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)

Character Class[a-zA-Z\d]+

+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)

\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-zA-Z])[a-zA-Z\d]+$

Q23AS9D0APQQ2
111111
aaaaaa
q2IasK231@!@!#_+123
asdas12312...1231@asda___213-1
asdas123121231asda2131