Hi Davo,
Thank you so much, it's working! Misunderstanding and requesting the parameter as 'category[]' was the problem, and requesting it as 'category' worked.
Thank you so much, it's working! Misunderstanding and requesting the parameter as 'category[]' was the problem, and requesting it as 'category' worked.
For anyone else viewing this at a later date, this is what my final code looks like: