Html URL中`%3F`的使用
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the use of `%3F` in URL
提问by Flummox - don't be evil SE
While moving a website - that I did not build - I have run into the use of %3F.
在移动网站时 - 我没有建立 - 我遇到了使用%3F.
%3Fis the percent-encodedversion of ?.
%3F是 的百分比编码版本?。
It seems to be used like this a lot:
它似乎经常这样使用：
<ahref="example%3Flang=1.html">Example</a>
when linking to a file named example_lang=1.html.
当链接到名为example_lang=1.html.
So, I replaced %3Fwith _, and all works again.
所以，我%3F用_,替换了所有的工作。
I am missing something here. The old website worked. After being moved, it no longer worked. After the replacement of %3Fto _, the links worked again. Why?
我在这里遗漏了一些东西。旧网站有效。移动后，它不再起作用。替换%3Fto 后_，链接再次起作用。为什么？
回答by sagar
First, you should elaborate your question to understand it better after all If I understood it correctly then this might be the answer.
首先，你应该详细说明你的问题，以便更好地理解它，如果我理解正确，那么这可能就是答案。
"_" is not a reserved URI character.
“_”不是保留的 URI 字符。
As you said that %3F is reserved for "?" then you are absolutely right but if you read the documentation written on wiki states that "_"(underscore) is not a reserved URI character.
正如您所说， %3F 是为“？”保留的。那么您是绝对正确的，但是如果您阅读了写在 wiki 上的文档，就会指出“_”（下划线）不是保留的 URI 字符。
So that for example if the URL for a web page is "example_test.html" then its encoded URL must be "example_test.html" if there is not any mechanism applied on that URL. Now I will take an another example of PHP based web page that may answer your question.
因此，例如，如果网页的 URL 是“ example_test.html”，那么它的编码 URL 必须是“ example_test.html”，如果该 URL 没有应用任何机制。现在我将举另一个基于 PHP 的网页示例，它可以回答您的问题。
In PHP there is a function "str_replace" that is used to replace the string by programmer defined characters or string.
在 PHP 中有一个函数“ str_replace”，用于用程序员定义的字符或字符串替换字符串。
Let assume that I have a page named "example_test.html" and for some xyz reasons I want to change it to "example%3Ftest.html" then I can use
假设我有一个名为“ example_test.html”的页面，出于某些 xyz 原因，我想将其更改为“ example%3Ftest.html”，然后我可以使用
str_replace("%3F","_","<a href='example%3Ftest.html'>Example Test</a>");
str_replace("%3F","_","<a href='example%3Ftest.html'>Example Test</a>");
This function will search for all occurences of "%3F" and replace it with "_" in provided string(here "href=example%3Ftest.html") and output as "href='example_test.html" which is the actual link for my file.
此函数将搜索所有出现的“ %3F”并将其替换为提供的字符串中的“ _”（此处为“ href=example%3Ftest.html”）并输出为“ href='example_test.html”，这是实际链接为我的文件。
