function add_security_headers() { header("Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://www.googletagmanager.com/gtag/js?id=UA-81024812-1; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self';"); } add_action( 'send_headers', 'add_security_headers' );