.htaccess

# Maintenance
#ErrorDocument 503 /503.php
#RewriteEngine On
#RewriteCond %{REMOTE_ADDR} !^your_ip_here$
#RewriteCond %{REQUEST_URI} !/503.php$
#RewriteCond %{REQUEST_URI} !/pt-logo.png$
#RewriteRule .* - [R=503,L]

###Setup
# Index
Options +FollowSymLinks
DirectoryIndex home.php index.php

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

#HTTPS
# RewriteCond %{HTTP:X-Forwarded-Proto} !https
# RewriteCond %{HTTPS} off
# RewriteRule .* https://gabrieldn5j.altervista.org%{REQUEST_URI} [L,R=301]

# Remove php extension
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteCond %{REQUEST_FILENAME}\.php ^(.*)\.php(.*)$
RewriteRule .* %1.php?%2 [QSA]
# alternative:
# RewriteCond %{REQUEST_FILENAME} !-f
# RewriteRule ^([^\.]+)$ $1.php [NC,L]

# Remove trailing slash (not working)
# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteRule ^(.*)/$ /$1 [L,R = 301]
</IfModule>

# Cache handler
# source: https://host-academy.it/tutorial-wordpress/how-to-tutorial-wordpress/144-browser-caching-in-wordpress-con-htaccess
<IfModule mod_headers.c>
    <FilesMatch "\\.(ico|gz)$">
        Header set Cache-Control "max-age=2592000, public"
    </FilesMatch>
    <FilesMatch "\\.(jpe?g|png|gif|swf|flv|pdf)$">
        Header set Cache-Control "max-age=604800, public"
    </FilesMatch>
    <FilesMatch "\\.(js|css)$">
        Header set Cache-Control "max-age=3600, private"
    </FilesMatch>
    <filesMatch "\\.(html|htm)$">
        Header set Cache-Control "max-age=300, public"
    </filesMatch>
</IfModule>

### Errors
# Error 403
ErrorDocument 403 /403.php

# Error 404
ErrorDocument 404 /404.php