.htaccess

<IfModule mod_rewrite.c>

    RewriteEngine On
    RewriteBase /

    # Redirect old hetongeluk.nl url's
    RewriteCond %{HTTP_HOST} ^(www\.)?hetongeluk\.nl$ [NC]
    RewriteRule ^ https://nl.roaddanger.org%{REQUEST_URI} [R=301,L,NE]

    RewriteCond %{HTTP_HOST} ^(www\.)?hetongeluk\.be$ [NC]
    RewriteRule ^ https://be.roaddanger.org%{REQUEST_URI} [R=301,L,NE]

    # Add www if not a subdomain
    RewriteCond %{HTTP_HOST} !^(.*)\.(.*)\. [NC]
    RewriteRule ^(.*)$ https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

    # Ensure https
    RewriteCond %{HTTPS} off
    RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

    # No redirect if existing directory
    RewriteCond %{REQUEST_FILENAME} !-d

    # No redirect if existing file
    RewriteCond %{REQUEST_FILENAME} !-f

    # Redirect urls to index.php file. The url is sent as a GET
    # QSA: Appends any query string from the original request URL to any query string created in the rewrite target.
    # L: Last Rule
    RewriteRule ^.+$ index.php?url=$1 [QSA,L]

</IfModule>