regex101: PCRE (Legacy) Match Workspace

Pro

Group 1(.*)

.*any character (except for line terminators), repeated any number of times

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2(.*)

.*any character (except for line terminators), repeated any number of times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(\d{4})

\d{4}a digit, repeated exactly 4 times

Non-Capturing Group(?:-(.*))?

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 4(.*)

.*any character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

25 tokens

Regular Expression

(.*)\/(.*)-(\d{4})(?:-(.*))?

Fooliser/Greatest Hits-1234-whatever stuffy stuff with 7777 digits
Foo4444Bar/Greatest Hits-2345-whatever stuffy stuff with 7777 digits
Bazqux/Best-of-2000-Hits-3456-whatever stuffy stuff with 7777 digits
Fooliser/Greatest Hits-1234
Foo4444Bar/Greatest Hits-2345
Bazqux/Best-of-2000-Hits-3456

Extraction

Fooliser/Greatest Hits-1234-whatever stuffy stuff with 7777 digits
Foo4444Bar/Greatest Hits-2345-whatever stuffy stuff with 7777 digits
Bazqux/Best-of-2000-Hits-3456-whatever stuffy stuff with 7777 digits
Fooliser/Greatest Hits-1234
Foo4444Bar/Greatest Hits-2345
Bazqux/Best-of-2000-Hits-3456