regex101: PCRE (Legacy) Substitution Workspace

Group 1(.+\/topic\/)

.+any character (except for line terminators), repeated at least once

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

topicthe literal text topic (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2([0-9]+)

Character Class[0-9]+

+matches at least one character from the set below:

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

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

(.+\/topic\/)([0-9]+)

New

https://forum.thirtybees.com/topic/1064
https://forum.thirtybees.com/topic/1064/ksksskjsjks
https://forum.thirtybees.com/topic/1064/sdsdsdfs/
https://forum.thirtybees.com/topic/1064/3424-sdsdsdfs/
https://forum.thirtybees.com/topic/1064/1234/

Extraction

https://forum.thirtybees.com/topic/1064
https://forum.thirtybees.com/topic/1064/ksksskjsjks
https://forum.thirtybees.com/topic/1064/sdsdsdfs/
https://forum.thirtybees.com/topic/1064/3424-sdsdsdfs/
https://forum.thirtybees.com/topic/1064/1234/