.htaccess

RewriteEngine on
RewriteCond %{REQUEST_METHOD} POST
RewriteRule ^ - [L]
RewriteCond %{THE_REQUEST} /([^.]+)\.php [NC]
RewriteRule ^ /%1 [NC,L,R]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^ %{REQUEST_URI}.php [NC,L]

RewriteEngine on
RewriteCond %{THE_REQUEST} /([^.]+)\.html [NC]
RewriteRule ^ /%1 [NC,L,R]
RewriteCond %{REQUEST_FILENAME}.html -f
RewriteRule ^ %{REQUEST_URI}.html [NC,L]
RewriteRule index.html index.php

<filesMatch ".(ico|jpg|jpeg|png|gif|svg|woff2)$">
 Header set Cache-Control "max-age=2592000, public"
</filesMatch>
<filesMatch ".(css|js)$">
 Header set Cache-Control "max-age=86400, public"
</filesMatch>


ErrorDocument 403 /errorfile/error403.html
ErrorDocument 404 /errorfile/error404.html
ErrorDocument 500 /errorfile/error500.html
ErrorDocument 502 /errorfile/nointernet.html
ErrorDocument 503 /errorfile/nointernet.html
ErrorDocument 505 /errorfile/nointernet.html

DirectoryIndex index.html index.php