+header(sprintf('Content-Security-Policy: %s', implode('; ', [
+ "default-src 'self' 'unsafe-inline' http://cdn.ckeditor.com", # some overrides remain
+ "img-src 'self' data: http://cdn.ckeditor.com", # inline svg (in css)
+ "frame-ancestors 'none'", # prevent malicious embedding
+])));