这里是完整的。htaccess文件，添加了将所有URL/页面重定向到站点唯一可访问页面（内容除外）的代码，包括和管理页面：

# BEGIN WordPress
# The directives (lines) between "BEGIN WordPress" and "END WordPress" are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress


# BEGIN Custom

<IfModule mod_rewrite.c>
## Redirect all except given page/url to given website address
## src: https://stackoverflow.com/questions/54176472/htaccess-redirect-all-links-except-base-url
RewriteCond %{REQUEST_URI} !^/$
RewriteCond %{REQUEST_URI} !^/page-accessible/
RewriteCond %{REQUEST_URI} !^/wp-content/
RewriteCond %{REQUEST_URI} !^/wp-admin/
RewriteCond %{REQUEST_URI} !^/wp-includes/
RewriteRule .* https://molhokwai-tests.cloudaccess.host/page-accessible/ [L,R=301]
</IfModule>

# END Custom

有人能解释一下吗？有没有更好的方法？

Thank you