How to call different index files for main domain and sub domains?

问题

I have a site in the name of www.mysite.com. when the url is www.mysite.com, I want to call index1.php file (this is my main domain).

If the url is from sub domains like test1.mysite.com, test2.mysite.com then I want to call index2.php file.

How to do it in htaccess?

回答1:

If they are both in the same document root, put something like this in your htaccess file in the document root:

RewriteEngine On

RewriteCond %{HTTP_HOST} ^(www\.)?mysite\.com$ [NC]
RewriteRule ^$ /index1.php [L]

RewriteCond %{HTTP_HOST} !^(www\.)?mysite\.com$ [NC]
RewriteRule ^$ /index2.php [L]

If you have links to directory indexes that need to be rewritten, you can do those on a case-by-case basis, for example:

RewriteCond %{HTTP_HOST} ^(www\.)?mysite\.com$ [NC]
RewriteRule ^(.*)/index\.(php|html|htm)$ /$1/index1.php [L]

RewriteCond %{HTTP_HOST} !^(www\.)?mysite\.com$ [NC]
RewriteRule ^(.*)/index\.(php|html|htm)$ /$1/index2.php [L]

来源：https://stackoverflow.com/questions/12312906/how-to-call-different-index-files-for-main-domain-and-sub-domains