PHP mysqli_fetch_assoc在localhost上工作，但不在godaddy服务器上工作

Question

I have this code that works on my localhost but not on godaddy server

$sql = 'SELECT hash FROM user_for_activation where registeredDate = ?;';
$stmt = mysqli_stmt_init($conn);

if(!mysqli_stmt_prepare($stmt,$sql)){
    echo "SQL Connection Failed";
}
else{
    mysqli_stmt_bind_param($stmt,"s",$dateRegistered);
    mysqli_stmt_execute($stmt);
    $result = mysqli_stmt_get_result($stmt);

    while($row = mysqli_fetch_assoc($result)){
        $hash = $row['hash'];
    }

} 

I am getting an error on line mysqli_fetch_assoc($result) but this works on my localhost. Is this a compatibility issue?