網站根目錄新建 .htaccess

RewriteEngine On 
RewriteCond %{SERVER_PORT} 80 
RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R,L]
RewriteEngine On 
RewriteCond %{SERVER_PORT} 80 
RewriteCond %{HTTP_HOST} ^example.com [NC,OR] 
RewriteCond %{HTTP_HOST} ^www.example.com [NC] 
RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R,L]

高級用法 (可選）

RewriteEngine on 

強制HTTPS

RewriteCond %{HTTPS} !=on [OR] 
RewriteCond %{SERVER_PORT} 80 

某些頁面強制

RewriteCond %{REQUEST_URI} ^something_secure [OR] 
RewriteCond %{REQUEST_URI} ^something_else_secure 
RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]

強制HTTP

RewriteCond %{HTTPS} =on [OR] 
RewriteCond %{SERVER_PORT} 443 

某些頁面強制

RewriteCond %{REQUEST_URI} ^something_public [OR] 
RewriteCond %{REQUEST_URI} ^something_else_public 
RewriteRule .* http://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]