In PHP, is there a function that returns an array made up of the value of a key from an array of associative arrays?

Question

I\'m sure this question has been asked before, my apologies for not finding it first.

The original array:

[0] => Array
    (
        [categoryId]          


        

Answer 1

You could use array_filter, and pass in a function based on the desired key.

Tadeck's answer is way better though.