regex101: PCRE (Legacy) Match Workspace

Pro

^start of line

Negated Character Class[^\?#\s]*?

*?matches any number of characters outside the set below:

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

\sany whitespace character

Group 1(\d{4,7})

\d{4,7}a digit, repeated between 4 and 7 times

Non-Capturing Group(?:[^-\w\s]\S*?$|$)

1st Alternative[^-\w\s]\S*?$

Negated Character Class[^-\w\s]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\wany word character

\sany whitespace character

\S*?any non-whitespace character, repeated any number of times

$end of line

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

25 tokens

Regular Expression

^[^\?#\s]*?(\d{4,7})(?:[^-\w\s]\S*?$|$)$

New

https://acme.com/cammins-1022

https://acme.com/francr-cameron-cummins-1022#home

https://acme.com/franchiummins-1025642?somthing

https://acme.com/cammins-1022

https://acme.com/francr-cameron-cummins-1022#home-321321-sadfg

https://acme.com/franchiummins-1025642?somthing-321321

https://acme.com/franchiummins-1025642-?somthing-321321

Extraction

https://acme.com/cammins-1022

https://acme.com/francr-cameron-cummins-1022#home

https://acme.com/franchiummins-1025642?somthing

https://acme.com/cammins-1022

https://acme.com/francr-cameron-cummins-1022#home-321321-sadfg

https://acme.com/franchiummins-1025642?somthing-321321

https://acme.com/franchiummins-1025642-?somthing-321321