Validating draw results

function getWinnerFromBlockHash($blockHash, $entries) {

    // Calculate the SHA-256 hash of the binary hash
    $hashed = hash('sha256', $blockHash);
    
    // Split the hash into 8 character chunks and convert each chunk to decimal
    $decimalChunks = str_split($hashed, 8);
    $decimalValues = array_map('hexdec', $decimalChunks);

    // Sum up the decimal values of chunks
    $total = array_sum($decimalValues);

    // Scale the total sum to fit within the entries range
    $randomNumber = (($total % $entries) + 1);

    return $randomNumber;
}

// Replace with the actual Bitcoin block hash used
$blockHash = "000000000000000000010ebeb68b95ec8742cc11c50961202b30b2d12e4bf9a9"; 

// Replace with the number of Bitcoin Jumble raffle draw entires
$entries = "266";

echo $randomNumber = getWinnerFromBlockHash($blockHash, $entries);