// Cache headers para Cloudflare
if ( ! defined( 'DONOTCACHEPAGE' ) ) {
    header( 'Cache-Control: public, max-age=3600' );
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function wp() in /var/www/brazilkeratin.ch/htdocs/wp-blog-header.php:16
Stack trace:
#0 /var/www/brazilkeratin.ch/htdocs/index.php(17): require()
#1 {main}
  thrown in <b>/var/www/brazilkeratin.ch/htdocs/wp-blog-header.php</b> on line <b>16</b><br />