Are there any built-in PHP functions that can simplify the process of extracting the two highest values from an array?

To extract the two highest values from an array in PHP, you can use the `rsort()` function to sort the array in descending order and then use the `array_slice()` function to extract the first two elements of the sorted array. This will give you the two highest values without the need for writing custom sorting or comparison logic.

$array = [5, 10, 3, 8, 15];
rsort($array);
$highest_values = array_slice($array, 0, 2);

print_r($highest_values);