Hi, I have a need to add some code to my functions.php in my Wordpress installation(s).

I'm not a developer, but I am handy with a text editor and can edit config files carefully which I can upload via ftp.

The alternate is to use a plugin like wpcode to insert custom code (although I don't want to pay for a premium version; I'd be only using wpcode lite).

I'm inclined to edit the functions.php myself (and keep a log of edits/changes, etc).

But when Wordpress core updates, does functions.php also get overwritten sometimes? How often is this specific file updated? I wouldn't want to keep editing the file with my edits every time WP has an update.

If functions.php gets overridden sometimes, is that a good reason for preferring to use a plugin like WPcode Lite instead? Thanks.

(PS, if you must know, I want to disable email notifications every time a #$#$#$ plugin is updated; that's why I want to add code to functions.php)