How to redirect a request to a child folder?

Question

htaccess

There is a structure like this:

site:
  folder1:
    index.php
    some_file.txt
  script.php
  .htaccess

Task: when a request is received to script.php, execute it, in other cases, redirect the request to the folder1 folder.
Tritely, a request to site/script.php will execute script.php, but site/index.php or site/some_file.txt will execute the corresponding files.
I tried, but it gives 500:

RewriteEngine on
RewriteCond %{REQUEST_URI} !script.php
RewriteRule ^(.*)$ folder1

Answer 1

RewriteEngine on
RewriteCond %{REQUEST_URI} !^/folder1/
RewriteCond %{REQUEST_URI} !^/script\.php
RewriteRule ^(.*)$ /folder1/$1 [L]