Hoe echo elke rij van mySQLi-query met behulp van PHP?

Probeer dit:

$qry = "SELECT * FROM campaign WHERE user_id=1";
$res = mysqli_query($conn, $qry);

if(mysqli_num_rows($res) > 0)   // checking if there is any row in the resultset
{
    while($row = mysqli_fetch_assoc($res))  // Iterate for each rows
    {
    ?>
        <li>
            <a>
                <div>
                    <p><?php echo($row['campaign_name']); ?></p>
                    <p>
                        Description Text
                    </p>
                </div>
            </a>
        </li>
    <?php
    }
}

Het zal herhalen voor elke rij in de resultatenset.