can't retrieve data

Index.php
        <div class="specia-top">
            <ul class="grid_2">
        <?php
            include ('koneksi.php');
            $query = "SELECT * from produk";
            $result = mysqli_query($conn, $query);
            $row = mysqli_fetch_array($result);
            echo mysqli_error($conn);
            if(mysqli_num_rows($result)>0){
            while($row== mysqli_fetch_array($result)){
        ?>
        <li>
                <a href="details.php?id=<?php echo $row['id'];?>"><img src='files/gbr_produk/<?php echo $row['gambar'];?>' class="img-responsive" alt=""></a>
                <div class="special-info grid_1 simpleCart_shelfItem">
                    <h5><?php echo $row['nm_brg']; ?></h5>
                    <div class="item_add"><span class="item_price"><h6><?php echo "IDR", $row['harga_brg'];?></h6></span></div>
                    <div class="item_add"><span class="item_price"><a href="#">add to cart</a></span></div>
                    <div class="item_add"><span class="item_price"><a href="product_detail?id=<?php echo $row['id'];?>">Detail</a></span></div>
                </div>
        </li>
        <li>
        <?php
            }
            }
        ?>
        </li>
        <div class="clearfix"> </div>
    </ul>
        </div>

Koneksi.php
<?php
    $dbname = "pbw_clothing";
    $host = "localhost";
    $username = "root";
    $password = "";
    $conn = mysqli_connect($host, $username, $password, $dbname);

        if (mysqli_connect_errno()) {
        echo "koneksi server gagal dilakukan";
        exit();
    }



?>