域名访问 HTTP_HOST 奇怪的现象
现象
<code>访问域名 http://www.a.com. 注意,结尾有一个.,打印$_SERVER $_SERVER['HTTP_HOST'] ==> www.a.com. (结尾有一个 .) $_SERVER['REQUEST_URI'] ==> /</code>
系统
<code>centos7 + nginx 1.6.8</code>
. 默认的附加到域名上了
回复内容:
现象
<code>访问域名 http://www.a.com. 注意,结尾有一个.,打印$_SERVER $_SERVER['HTTP_HOST'] ==> www.a.com. (结尾有一个 .) $_SERVER['REQUEST_URI'] ==> /</code>
系统
<code>centos7 + nginx 1.6.8</code>
. 默认的附加到域名上了
根域
域名最后多个.
实际上才是正规的写法。就是所谓的FQDN,Fully-Qualified Domain Name。
最后一个点用于区分以root label结尾的完整域名,和在本地域名内的相对域名。就好象*nix下绝对路径以/
开头,不以/
开头的就是相对路径一个道理。
参考文档:Trailing Dots in Domain Names

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