Regular Expressions 101

Pro

^start of line

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)

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)

Non-Capturing Group(?:\s*[A-Z0-9]\s*){10,15}

{10,15}repeats the group contents below between 10 and 15 times:

\s*any whitespace character, repeated any number of times

Character Class[A-Z0-9]

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\s*any whitespace character, 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.

25 tokens

^(?=.*[0-9])(?=.*[A-Z])(?:\s*[A-Z0-9]\s*){10,15}$

New

ABABABABAB12345
ABAB1234ABA32
ABA  BA BABAB12345
1234567890987
ABCDEFGHIJK
ABABAB%ABAB12?345