php：array_uintersect，带有动态数组

Question

I have a foreach loop that returns a variable number of arrays.

I need to run array_uintersect between them with a custom function to find common elements, but array_uintersect only accepts 3 parameters (2 arrays and the function).

This is what I have right now:

$all_freaktag_favorites = array();

foreach ($serie_preferite as $serie_preferita) {
    $preferite_elements = pods('category', $serie_preferita['term_id']);
    $freaktag_preferita = $preferite_elements->field('freaktag');

    $all_freaktag_favorites[] = $freaktag_preferita;
}

function comparaFreaktag($tag1, $tag2) {
    return strcmp($tag1['term_id'], $tag2['term_id']);
};

$common_freaktag_between_favorites = array_uintersect(
    $all_freaktag_favorites[0],
    $all_freaktag_favorites[1],
    'comparaFreaktag'
);

This correctly returns me the intersection between the first 2 arrays in the loop, but I don't know how to do that with an undefined number of arrays.

Thanks!

Answer 1

Put all arrays into a parent array and use the spread operator:

$all = [[/** xxx */, [/** xxx */], [/** xxx */], ...];

$all[] = 'comparaFreaktag';

$common_freaktag_between_favorites = array_uintersect(...$all);