regex101: PCRE (Legacy) Match Workspace

Pro

Positive Lookahead(?=\b.{48}\b)

\ban ASCII word boundary

.{48}any character (except for line terminators), repeated exactly 48 times

\ban ASCII word boundary

Character Class[A-Z0]*

*matches any number of characters from the set below:

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

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[A-Z0]*

*matches any number of characters from the set below:

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

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

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

25 tokens

Regular Expression

(?=\b.{48}\b)[A-Z0]*0[A-Z0]*

New

AUSGKAJDGAYGDKJAA0GDKJAGDJKASGDKJASGDKYQGWUDVASA
AUSGKAJDGAYGDKJAAAGDKJAGDJKASGDKJASGDKYQGWUDVASA
AUSGKAJDGAYGDKJAA0GDKJAGDJKASGDKJASGDKYQGWUDVASAB
AUSGKAJDGAYGDKJAA0KJAGDJKASGDKJASGDKYQGWUDVASA
quick brown fox AUSGKAJDGAYGDKJAS0GDKJAGDJKASGDKJASGDKYQGWUDVAS0 jumped over the fence
quick brown fox AUSGKAJDGAYGDKJAS0GDKJAGDJKASGDKJASGAAAAAAADKYQGWUDVAS0 jumped over the fence
quick brown fox AUSGKAJDGAYGDKJASBGDKJAGDJKASGDKJASGDKYQGWUDVASA jumped over the fence