PHP最大函数用键作为php函数

Question

I have a function in php:

function cmp_key($lst){
    $itersect_size = count(array_intersect($zset, $lst)); //zset is a list which i have
    return $intersect_size,-count($lst)
}

and then this code in python:

list_with_biggest_intersection = max(iterable,key = cmp_key)

how can i do the above line of code in php given that i want to use the php function cmp_key as the key for the max function...

Answer 1

Duplicating @mgilson's answer in Python, here's the equivalent in PHP.

function cmp_key($set, $list) {
  return count(array_intersect($set, $list));
}

// This iterates over all lists and compares them with some
// original list, here named $set for consistency with the other example.
$largest = NULL;
foreach ($lists as $list) {
  if (!isset($largest)) {
    $largest = array('list' => $list, 'count' => cmp_key($set, $list));
  }
  else {
    $count = cmp_key($set, $list);
    if ($count > $largest['count']) {
      $largest = array('list' => $list, 'count' => $count);
    }
  }
}
$list_with_biggest_intersection = $largest['list'];