Regular Expressions 101

Pro

1st Alternative(?<=\?{3})\d+

Positive Lookbehind(?<=\?{3})

\?{3}the literal ? (63₁₀ / 77₈ / 3F₁₆) , repeated exactly 3 times

\d+a digit, repeated at least once

2nd Alternative\d+(?=\?{3})

\d+a digit, repeated at least once

Positive Lookahead(?=\?{3})

\?{3}the literal ? (63₁₀ / 77₈ / 3F₁₆) , repeated exactly 3 times

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

(?<=\?{3})\d+|\d+(?=\?{3})

New

acc5???7???7ss?3rr1??5
5???abc???3
5????abc2???xyz????1abc???3abc

acc5???7???7ss?3rr1??5
5???abc???3
5????abc2???xyz????1abc???3abc