Just come back to find the 1.9.7 update which I have installed. I have one custom function in functions.php called by an echo on an element and also echos calling the wordpress function wp_is_mobile. I have added the white list function to functions.php but do I also need to generate code signatures? At one point in the documentation it says it must be run but elsewhere it says it only applies to Code (element), SVG (element) and Query editor instances so I’m a bit unsure.
The echos work without generating code signatures so maybe I don’t need to do anything else.
Thanks.