regex101: PCRE (Legacy) Match Workspace

Explanation

Pro

1st Alternative^(?=.*[A-Z])(?=.*\d).*$

^start of line

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(?=.*\d)

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

\da digit

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

$end of line

2nd Alternative^(?=.*[@\].])(?=.*\d).*$

^start of line

Positive Lookahead(?=.*[@\].])

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

Character Class[@\].]

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Positive Lookahead(?=.*\d)

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

\da digit

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

$end of line

3rd Alternative^(?=.*[@\].])(?=.*[A-Z]).*$

^start of line

Positive Lookahead(?=.*[@\].])

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

Character Class[@\].]

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

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)

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

$end of line

4th Alternative^[A-Z]$

^start of line

Character Class[A-Z]

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

$end of line

5th Alternative^[A-Z]{3,}$

^start of line

Character Class[A-Z]{3,}

{3,}matches at least 3 characters from the set below:

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

$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

Quick Reference

25 tokens

Regular Expression

^(?=.*[A-Z])(?=.*\d).*$|^(?=.*[@\].])(?=.*\d).*$|^(?=.*[@\].])(?=.*[A-Z]).*$|^[A-Z]$|^[A-Z]{3,}$

New

OJH
WV]
2V
W.W
V
@A
AL
AS
1234
1
23
1A34
23@5
2@A