How to improve the function?

Question

PHP

Hello. There is a function that accepts a request, checks for new tags, if any, adds to the database, get the id and add everything to the common array with indexes, and finally synchronize.
How would you make this feature?

public static function getTags($requestTags): array
{
    $tags = [];

    if ($requestTags) {
        foreach ($requestTags as $tag) {
            if (is_numeric($tag)) {
                $tags[] = $tag;
            } else {
                $newTag = Tag::upsert(['name' => $tag]);
                $tags[] = $newTag->id;
            }
        }
    }

    return $tags;
}

Is it possible, for example, to do without the forech and use the standard functions of Php/Laravel?

Answer 1

return \collect((array)$requestTags)->map(function($tag): int {
    return \is_numeric($tag) ? (int)$tag : Tag::upsert(['name' => $tag])->id;
});