<?php

  // DB details
    $hostname = "whatever";
    $username = "whatever";
    $password = "whatever";
    $dbname = "whatever";
// Create connection
    $conn = new mysqli($hostname, $username, $password, $dbname);
    // Check connection
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    }
    $sql = "SELECT * FROM relevant_topics";
    $result = $conn->query($sql);
       if ($result->num_rows > 0) {
        // Removing special characters from rows.
        while($row = $result->fetch_assoc()) {
             $cardID = $row["cardID"];

        echo '<div class="card">"$cardID"</div>';
}
}
else {
    echo 'connection failed';
}
?>