< meta charset =" utf-8">声明自己的文件的编码？ [英] <meta charset="utf-8"> declares encoding of own file?

问题描述

我读到一个HTML文件必须包含头中的< meta charset =utf-8> code> - 要符合标准。

I read that an HTML file has to contain the <meta charset="utf-8">element in the head-element to be standard-conforming.

为什么指定文件本身的编码是有意义的？为了读取 meta -element，必须知道编码;

Why does it make sense to specifiy the encoding of a file in the file itself? In order to read the meta-element one has to know the encoding already; so it seems redundant/useless to specify the encoding again.

推荐答案

直到读取这个元素，文档才会被解释为默认的编码用户代理。如果编码与默认值不同，则根据元元素重新解释文档。这就是为什么你应该尽早放置它，或者最好使用HTTP头（见下文）。使用< meta> 元素的希望是前面的字符都在ASCII字符集中，在所有字符集中正确解释。

Until this element is read, the document is interpreted with the default encoding of the user agent. If the encoding is different from the default, then the document is re-interpreted according to the meta element. That's why you should place it as early as possible, or preferably use an HTTP header (see below). The hope with the <meta> element is that the preceding characters are all in the ASCII character set, which are interpreted correctly in just about all character sets.

但是，一般情况下，如果可能，此信息应该在HTTP响应头中发送：

In general, however, and if it is possible, this information should be sent in an HTTP response header:

Content-Type: text/html; charset=utf-8

这可以确保文档从头开始正确解释。

This ensures that the document is interpreted correctly from the start.

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