How to create and modify a functions.php file in a child theme

[Angelo]

Angelo

December 9, 2019 at 3:19 am

Hi Ben,
I need to upload my books in EPUB files that is an extension file not allowed in WP. I found an article how to allow it adding some code in the functions.php of the theme, but of course I don’t like to add in your theme function. So as I am using a child theme can you explain how can add this code in a file called functions.php?
function addUploadMimes($mimes) {
$mimes = array_merge($mimes, array(
'epub|mobi' => 'application/octet-stream'
));
return $mimes;
}
add_filter('upload_mimes', 'addUploadMimes');

Thanks you
Angelo