带有子域的.htaccess重定向

Question

我有很多网站，可以在子域上访问，如：

website1.com.banana.servers.com
website2.net.apple.servers.com
website3.com.avocado.servers.com

我也有他们中的每一个相应的域名：

website1.com
website2.net
website3.com

我需要做的就是编写一个通用的.htaccess规则，将子域(以randomWord.servers.com结尾)重定向到一个短域。

例如：website1.com.banana.servers.com应该成为-> website1.com

Answer 1

像这样试一试我现在还没试过，

RewriteEngine On
RewriteCond %{HTTP_HOST} ^([^\/]*)\.([^\/]*)\.([^\/]*)\.([^\/]*)\.com
RewriteRule ^ http://%1.com [R=301,L]

Answer 2

#The line above tells the server to turn on the engine for rewriting urls.    
RewriteEngine On
    #If the host is "sub.domain.com"
     RewriteCond %{HTTP_HOST} ^sub.domain.com$ [NC]
     #Then rewrite any request to /folder
#This line is a condition for the RewriteRule where We match against the http Host using regex pattern. The condition says that if the host is sub.domain.com then execute the Rule.
     RewriteRule ^((?!folder).*)$ /folder/$1 [NC,L]