在PHP中使用另一个数组排序数组的最佳方法是什么？

Question

Suppose I have an array that I want to sort, and the order is not something computable, but rather, given by another array which lists the keys in the desired order:

$ordering_array = [
    'c',
    'a',
    'k',
    'e',
];

As an added complication, not all of these keys might be present in my array to sort:

$given_array = [
    'a' => 'value',
    'c' => 'value',
    'e' => 'value',
];

What is the cleanest / quickest way to achieve this?

My method is:

$new_array = array_fill_keys($ordering_array, NULL);

foreach ($given_array as $key => $value) {
  $new_array[$key] = $value;
}

$new_array = array_filter($new_array);

Is there a better way?

Answer 1

You can replace the foreach with array_replace()

$new_array = array_fill_keys($ordering_array, NULL);
$new_array = array_replace($new_array, $given_array);
$new_array = array_filter($new_array);