regex101: PCRE (Legacy) Match Workspace

Explanation

Pro

Positive Lookbehind(?<=\s|^)

1st Alternative\s

\sany whitespace character

2nd Alternative^

^start of line

Character Class[A-Z0-9]{2,}

{2,}matches at least 2 characters from the set below:

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

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

Positive Lookahead(?=\s|$)

1st Alternative\s

\sany whitespace character

2nd Alternative$

$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

(?<=\s|^)[A-Z0-9]{2,}(?=\s|$)

New

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Substitution

If you want to shop in store, use this coupon ZXXZX123 to save $20 off your in-store purchase of $100 or more, or $100 off $500 or more.This is another coupon code which will match ZXX234.Z3345Z is the coupon code for 100% off but it won't match.