What does dollar sign $ do in url?

Question

I have been reading that $ ! ; . , are \'reserved\' chars in url. But I can not find what are they reserved for.

/ path delimiter  
: port
? query         


        

Answer 1

RFC 2396 is obsolete.

For modern versions of the spec, see:

• RFC3987 (in relation to IRI's); and
• RFC3986 (in relation to URI's).

About /

Yes, that is used as a delimiter in the path part.

About :

Ye, it is used as a prefix for port, but it has other roles such as the user info separator, and a delimiter for IP styles of host specifiers.

About =

Suprisingly, the = character is not part of the general URL, URI nor IRI syntax. It has a special meaning only the the http(s) protocols. This is not intrinsic to URL/IRI/URI

About +

The role of + as a substitute for space is NOT part of the URL/URI/IRI syntax. It is merely a convenient invention of some PHP programs for pretty URL purposes.

About $ and ;

These have no special meaning in the URL/URI/IRI syntax. They can be part of the sub-delimiters production, which can be used in the user info part, future-IP part, path segment or a host part.