写在.htaccess中
一:http跳转https
RewriteCond %{SERVER_PORT} !^443$
RewriteRule (.*) https://%{SERVER_NAME}/$1 [R=301,L]
二:不带www跳转到带www
RewriteCond %{http_host} ^yudouyudou.com [NC]
RewriteRule ^(.*)$ http://www.yudouyudou.com/$1 [L,R=301]
三:带www跳转到不带www
RewriteCond %{http_host} ^www.yudouyudou.com [NC]
RewriteRule ^(.*)$ http://yudouyudou.com/$1 [L,R=301]
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