美元符号 $ 在 url 中有什么作用? [英] What does dollar sign $ do in url?

问题描述

我一直在阅读 $ ！;., 是 url 中的保留"字符.但我找不到他们保留什么.

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

/ path delimiter  
: port
? query  
& glue get params  
= param=val  
\# link anchor  
+ space

.

我的特定问题:
有谁知道什么是 $ ！;., 用于?
: 在请求 uri 中有什么特殊含义吗?

My specific questions:
Does anyone know what are $ ! ; . , used for?
Does : have any special meaning in request uri?

推荐答案

RFC 2396 已过时.

RFC 2396 is obsolete.

有关规范的现代版本，请参阅:

For modern versions of the spec, see:

• RFC3987(与 IRI 相关)；和
• RFC3986(与 URI 相关).

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

是的，在路径部分用作分隔符.

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

是的，它用作端口的前缀，但它还有其他作用，例如用户信息分隔符和主机说明符 IP 样式的分隔符.

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.

令人惊讶的是，= 字符不是通用 URL、URI 或 IRI 语法的一部分.它只有 http(s) 协议具有特殊含义.这不是 URL/IRI/URI 固有的

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

+ 代替空格的作用不是 URL/URI/IRI 语法的一部分.它只是一些 PHP 程序为了漂亮的 URL 目的而方便的发明.

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.

这些在 URL/URI/IRI 语法中没有特殊含义.它们可以是子分隔符生成的一部分，可以用于用户信息部分、未来 IP 部分、路径段或主机部分.

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.

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