php - hreflang 应该如何构建？

Question

我的问题是

<link rel="alternate" href="http://example.com/en" hreflang="en">
<link rel="alternate" href="http://example.com/it" hreflang="it">

应该像上面的所有页面一样，或者应该用每个页面的实际 url 来改变，比如:

<link rel="alternate" href="http://example.com/en/<?=$current;?>" hreflang="en">
<link rel="alternate" href="http://example.com/it/<?=$current;?>" hreflang="it">
<link rel="alternate" href="http://example.com/<?=$current;?>" hreflang="x-default">

Answer 1

HTML5 defines :

If the alternate keyword is used with the hreflang attribute, and that attribute's value differs from the root element's language, it indicates that the referenced document is a translation.

因此它适用于翻译的文档(即页面)，而不是网站。

http://example.com/en 链接到 http://example.com/it,
http://example.com/en/hello 链接到 http://example.com/it/ciao。