Recently I’ve been working with a client that wanted me to create a way to sort recipes into different types of food and under different types of dishes. This had me thinking about custom fields where you have meta_key and meta_value for each key. The client also wanted to use this in other scenarios so basically i started thinking it should be sorted on categories as well. The function takes one argument which is the category slug, it will then loop through meta_keys belonging to that category, secondly the meta_values and third each posts matching that specific value.
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