How to deny access to php files in .htaccess?

Question

PHP

Explain for .htaccess
How can I disable access to all php files, except for index.php, which is in the root?
This gives access to absolutely all indexes

<FilesMatch "\.php">
  Order allow,deny
  Deny from all
  Satisfy all
</FilesMatch>
<FilesMatch "index\.php">
  Allow from all
</FilesMatch>

And this, for some reason, prohibits everything, even when I turn to http://site.ru/
RewriteRule \.php$ - [F]
And what does this dash before the flag actually mean?

Answer 1

deny from all
you create .htaccess in the directory
or you can disable everything in the main file, and then allow the necessary

<Files ~ "^.*">
  Deny from all
</Files>

<Files ~ "^index\.php|css|js|.*\.png|.*\.jpg|.*\.gif">
  Allow from all
</Files>