从数组中删除第一个元素（键和值），将其转换为另一个数组

Question

I want to capture the first element of an array and its value in a second array, removing it from the first.

Is there a core PHP function that does what my_function does here?

function my_function(&$array) {
  $key = current(array_keys($array));
  $value = $array[$key];
  unset($array[$key]);
  return [$key => $value];
}
$array = [
  'color' => 'red',
  'car' => 'ford'
  'house' => 'cottage',
];

$top = my_function($array);

print_r($top);
print_r($array);

Output:

Array
(
    [color] => red
)
Array
(
    [car] => ford
    [house] => cottage
)

If there's not a core function, is there a simpler way of achieving this behavior? IIRC, passing variables by reference is frowned upon.

Bonus question: is there a word for the combination of both key and element from an array? I feel like 'element' doesn't necessarily include the key.

edit Since there seems to be a commonly held misunderstanding, at least in PHP 7, array_shift does not do the desired behavior. It only returns the first value, not the first element:

$ cat first_element.php
<?php

$array = [
  'color' => 'red',
  'car' => 'ford',
  'house' => 'cottage',
];

$top = array_shift($array);

print_r($top);
print_r($array);

$ php first_element.php
redArray
(
    [car] => ford
    [house] => cottage
)

Answer 1

array_splice doesn't always preserve keys, so just get the key and combine with the result of array_shift to also remove it:

$result = [key($array) => array_shift($array)];

If needed, reset the array pointer:

reset($array) && $result = [key($array) => array_shift($array)];