How to remove all instances of duplicated values from an array

Question

I know there is array_unique function, but I want to remove duplicates. Is there a built-in function or do I have to roll my own.

Example input:

Answer 1

Only partially relevant to this specific question - but I created this function from Gumbo's answer for multi dimensional arrays:

function get_default($array)
{
    $default = array_column($array, 'default', 'id');
    $array = array_diff($default, array_diff_assoc($default, array_unique($default)));

    return key($array);
}

In this example, I had cached statuses and each one other than the default was 0 (the default was 1). I index the default array from the IDs, and then turn it into a string. So to be clear - the returned result of this is the ID of the default status providing it's in the same part of the multi dimensional array and not the key of it