快速问题：它实际上是否允许使用标头标签两次？例如我有两个重要的头部在我的header.PHP哪里都可以有标头标签？
解决方法
是的，但有一个catch。 W3文档声明标签表示它们最近的祖先段的标题和页脚区域。我会建议您尽可能多的你想要的，但每个“部分”，你的页面，即身体，部分等每个只有1。
从W3
A header element is intended to usually contain the section’s heading (an h1–h6 element or an hgroup element),but this is not required. The header element can also be used to wrap a section’s table of contents,a search form,or any relevant logos.
=======================
The footer element represents a footer for its nearest ancestor sectioning content or sectioning root element. A footer typically contains information about its section such as who wrote it,links to related documents,copyright data,and the like.
这里是他们各自的标准文档的链接：header和footer