Htaccess文件仅在项目中起作用

I am using the same code, but it work only on first project.

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l

RewriteRule ^(.+)$ index.php?pg=$1 [QSA,L]