Update recommended .htaccess (#11939)

Used in current official Slim skeleton.
Ref: 037cfa2b68/public/.htaccess

modules/openapi-generator/src/main/resources/php-slim4-server/.htaccess

@@ -1,10 +1,38 @@
+Options All -Indexes
+
+<Files .htaccess>
+order allow,deny
+deny from all
+</Files>
+
 <IfModule mod_env.c>
   SetEnv APP_ENV 'production'
 </IfModule>
 
 <IfModule mod_rewrite.c>
   RewriteEngine On
-    RewriteCond %{REQUEST_FILENAME} !-f
+
+  # Redirect to HTTPS
+  # RewriteEngine On
+  # RewriteCond %{HTTPS} off
+  # RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
+
+  # Some hosts may require you to use the `RewriteBase` directive.
+  # Determine the RewriteBase automatically and set it as environment variable.
+  # If you are using Apache aliases to do mass virtual hosting or installed the
+  # project in a subdirectory, the base path will be prepended to allow proper
+  # resolution of the index.php file and to redirect to the correct URI. It will
+  # work in environments without path prefix as well, providing a safe, one-size
+  # fits all solution. But as you do not need it in this case, you can comment
+  # the following 2 lines to eliminate the overhead.
+  RewriteCond %{REQUEST_URI}::$1 ^(/.+)/(.*)::\2$
+  RewriteRule ^(.*) - [E=BASE:%1]
+
+  # If the above doesn't work you might need to set the `RewriteBase` directive manually, it should be the
+  # absolute physical path to the directory that contains this htaccess file.
+  # RewriteBase /
+
   RewriteCond %{REQUEST_FILENAME} !-d
+  RewriteCond %{REQUEST_FILENAME} !-f
   RewriteRule ^ index.php [QSA,L]
 </IfModule>

samples/server/petstore/php-slim4/public/.htaccess

@@ -1,10 +1,38 @@
+Options All -Indexes
+
+<Files .htaccess>
+order allow,deny
+deny from all
+</Files>
+
 <IfModule mod_env.c>
   SetEnv APP_ENV 'production'
 </IfModule>
 
 <IfModule mod_rewrite.c>
   RewriteEngine On
-    RewriteCond %{REQUEST_FILENAME} !-f
+
+  # Redirect to HTTPS
+  # RewriteEngine On
+  # RewriteCond %{HTTPS} off
+  # RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
+
+  # Some hosts may require you to use the `RewriteBase` directive.
+  # Determine the RewriteBase automatically and set it as environment variable.
+  # If you are using Apache aliases to do mass virtual hosting or installed the
+  # project in a subdirectory, the base path will be prepended to allow proper
+  # resolution of the index.php file and to redirect to the correct URI. It will
+  # work in environments without path prefix as well, providing a safe, one-size
+  # fits all solution. But as you do not need it in this case, you can comment
+  # the following 2 lines to eliminate the overhead.
+  RewriteCond %{REQUEST_URI}::$1 ^(/.+)/(.*)::\2$
+  RewriteRule ^(.*) - [E=BASE:%1]
+
+  # If the above doesn't work you might need to set the `RewriteBase` directive manually, it should be the
+  # absolute physical path to the directory that contains this htaccess file.
+  # RewriteBase /
+
   RewriteCond %{REQUEST_FILENAME} !-d
+  RewriteCond %{REQUEST_FILENAME} !-f
   RewriteRule ^ index.php [QSA,L]
 </IfModule>