regex - Meaning of (%.+)? in a regular expression -

regex - Meaning of (%.+)? in a regular expression -

what meaning of (%.+)? in regular expression. found in regular look ipv6 validation.

thanks in advance.

the character % followed minimum of 1 other character except line feed. pattern grouped , grouping expected 1 time or not @ all.

() - group . - character except line feed (see modifier/option s) + - pattern or character before has exists 1 time or many times ? - pattern or character before can exists 1 time or not

regex