Merkle Root in PHP Example

merkle-root.php

<?php

$array = ["spoiler", "kirk", "category", "brand"];
$hashes = [];
$hash = "";

foreach ($array as $key => $value) {
    $hashes[] = hash("sha256", $value);
}

$count = count($hashes) - 1;

while (true) {
    $temp = [];
    for ($i = 0; $i <= count($hashes)-1; $i+=2) {
        $temp[] = hash("sha256", $hashes[$i] . $hashes[$i+1]);
    }
    $hashes = $temp;
    if (count($hashes)==1) {
        break;
    }
}

echo "Root is: " . $hashes[0];