尝试将其放在.htaccess文件中：

Try putting this in your .htaccess file:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^sub.domain.com
RewriteRule ^(.*)$ http://domain.com/subdomains/sub/$1 [L,NC,QSA]

对于更一般的规则（适用于任何子域，而不仅仅是 sub ）用以下替换最后两行：

For a more general rule (that works with any subdomain, not just sub) replace the last two lines with this:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^(.*)\.domain\.com
RewriteRule ^(.*)$ http://domain.com/subdomains/%1/$1 [L,NC,QSA]