我对.htaccessRegEx还是很陌生，对此感到非常沮丧，但是我可能过于复杂了。基本上：
HTTP_HOST将是多个域之一，应按原样保留，包括子域，除非 www.应始终删除domain1“ domain2”具有SSL，因此HTTPS应强制使用，但任何其他都应强制使用HTTPfoo，则重写foo该子文件夹，而不是子文件夹。foo.是子域：
foo.*.com/index.php缺少/禁止的网页没有在foo子域仍应被发送到\index.php根，这我目前正在做的：
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ /index.php [last,nocase]
我的尝试：
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www. [NC]
RewriteRule ^(.*)$ $1 [L]
RewriteCond %{HTTP_HOST} domain1\.ca [NC]
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L]
RewriteCond %{HTTP_HOST} !domain1\.ca [NC]
RewriteRule ^ http://%{HTTP_HOST}%{REQUEST_URI} [L]
RewriteCond %{REQUEST_URI} ^/foo.* [NC]
RewriteRule ^ %{REQUEST_SCHEME}://foo\.%{HTTP_HOST}%{REQUEST_URI} [L]
RewriteRule "^/foo/(.+)" "%{REQUEST_SCHEME}://foo.%{HTTP_HOST}/$1" [L,NS,QSA,R=301]
一些例子：
incoming url: should become:
http://www.domain1.com/foo/blah => https://foo.domain1.com/blah
https://example.com/foo/blah.html => http://foo.example.com/blah.html
http://www.domain1.com/foo/index.php/foo => https://foo.domain1.com/foo
https://example.com/blah/blah.html => http://example.com/blah/blah.html
我希望这是有道理的（我不堪重负！）-谢谢！
这些规则是根据您的问题进行的顺序翻译
RewriteEngine On
# Remove www from domain, keep scheme (http or https)
RewriteCond %{HTTP_HOST}#%{HTTPS}s ^www\.([^#]+)#(?:off|on(s)) [NC]
RewriteRule ^ http%2://%1%{REQUEST_URI} [R=302,L]
# force https for {domain1,domain2}
RewriteCond %{HTTP_HOST} ^(?:domain1|domain2)\. [NC]
RewriteCond %{HTTPS} off [NC]
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [R=302,L]
# force http for others
RewriteCond %{HTTP_HOST} !^(?:domain1|domain2)\. [NC]
RewriteCond %{HTTPS} on [NC]
RewriteRule ^ http://%{HTTP_HOST}%{REQUEST_URI} [R=302,L]
# foo subfolder -> foo subdomain
RewriteCond %{HTTP_HOST} !^foo\. [NC]
RewriteCond %{REQUEST_URI}#%{HTTPS}s ^/foo/([^#]+)#(?:off|on(s)) [NC]
RewriteRule ^ http%2://foo.%{HTTP_HOST}/%1 [R=302,L]
# hide index.php for foo subdomain
RewriteCond %{HTTP_HOST} ^foo\. [NC]
RewriteRule ^index\.php(?:$|/(.*)) /$1 [R=302,L]
# (internal rewrite) foo subdomain -> foo's root index
RewriteCond %{HTTP_HOST} ^foo\. [NC]
RewriteCond %{REQUEST_URI} !^/foo/ [NC]
RewriteRule ^ /foo/index.php [L]
# default rule (root index)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ /index.php [L]
我同意这很丑。但这应该可以如您所愿。它已经在本地服务器上进行了测试，并且您显示的所有示例测试都已通过。
注意：我故意使用302重定向。当您一切正常时，只需切换回即可301。
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我来说两句