的.htaccess; 如何获取子文件夹但不显示在URL中？

Let's say I call www.expamle.com in browser. That'll get the data from / on my server.

But how can I get the data from /folder/ on my server but still able to call from www.expamle.com and also remain www.expamle.com as browser address?

Additionally e.g. www.expamle.com/my_file.php should be called from /folder/my_file.php on my server.

How can I do that with .htaccess?

You can use the following rule :

RewriteEngine on


RewriteRule !^folder /folder%{REQUEST_URI} [L]

This will rewrite all requests including existing files and subfolders from your root to the /folder . If you dont want to rewrite your existing root files and folders, you can use this

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ /folder%{REQUEST_URI} [L]

Try below rule too,

RewriteEngine On
RewriteRule ^(.*)$ /folder/$1 [QSA,L]