second highest value

second_highest.php

//assumes that you have installed PHPAlgorithms properly:
//https://github.com/doganoo/PHPAlgorithms

$arr = [1, 2, 3, 4, 5, 6, 7, 8];
echo secondHighest($arr); //echo's 7

function secondHighest(array $array): int {
    $maxHeap = new MaxHeap();
    foreach ($array as $value) {
        $maxHeap->insert($value);
    }
    print_r($maxHeap->getHeap());
    return $maxHeap->getHeap()[1] > $maxHeap->getHeap()[2] ? $maxHeap->getHeap()[1] : $maxHeap->getHeap()[2];
}