For example, I would like to create an array from the elements in this string:
$str = 'red,     green,     blue ,orange';
I know you can explode and loop through them and trim:
$arr = explode(',', $str);
foreach ($arr as $value) {
    $new_arr[] = trim($value);
}
But I feel like there's a one line approach that can handle this. Any ideas?