'.$html_url.'.'; exit; } header( 'Strict-Transport-Security: max-age=999999999; includeSubDomains' ); header( 'X-XSS-Protection: 1; mode=block' ); header( 'X-Frame-Options: SAMEORIGIN' ); header( 'Referrer-Policy: same-origin' ); header( 'X-Content-Type-Options: nosniff' ); header( 'Content-Security-Policy: default-src none' ); http_response_code( 404 ); echo '404 Not Found'; ?>