Php pdo: Showing topics out database - php

Question

I need some help finding out how to show all the topics from the mysql (phpmyadmin) database on my website.
This is how it looks like now
The code for that is:
<section class="col-md-4 connectedSortable">
<!-- TABLE: LATEST ORDERS -->
<div class="box box-info">
<div class="panel panel-default">
<div class="panel-heading main-color-bg">
<h3 class="panel-title">Topics</h3>
</div>
<div class="container-fluid">
<div class="row content">
<ul class="nav nav-pills nav-stacked">
<li class="active">Home</li>
<li>Friends</li>
<li>Family</li>
<li>Photos</li>
</ul><br>
</div>
</div>
</div>
</div><!-- /.box -->
</section><!-- right col -->
I want this list to be the list of topics out of the database
How the database looks like
this is my config.php:
<?php
date_default_timezone_set('Europe/Amsterdam');
error_reporting(E_ALL & ~ E_DEPRECATED);
ini_set('display_errors','ON');
$CONFIG = array();
$CONFIG['root'] = '####';
$CONFIG['rootwebsite'] = '####';
$CONFIG['website'] = '####';
$CONFIG['dbhost'] = 'localhost';
$CONFIG['dbuser'] = '####';
$CONFIG['dbpass'] = '####';
$CONFIG['dbdatabase'] = 'tom';
?>
What I tried:
class Forum
{
private $dbh; //dbh = database handler.
public function __construct($database)
{
$this->dbh = $database;
}
/* function that gets the main forum board */
public function getForum()
{
$query = $this->dbh->prepare('SELECT * FROM `topics` ORDER BY `id` ASC');
$query->execute();
$results = $query->fetchAll();
foreach( $results as $row ){
print_r( $row );
}
}
}

Answer 1

Here goes from the PDO perspective:
<?php
// Connect to DB
try {
$yourdsn = 'mysql:dbname=<YOURDBNAME>;host=<YOURDBHOST>;
$data = new PDO($yourdsn, $youruser, $yourpassword);
$data->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$data->exec("set names utf8");
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}
Then query your table
$sql = "SELECT * FROM topics ORDER BY id DESC";
$topics = $data->prepare($sql);
$topics->execute();
$tops = $topics->fetchAll(PDO::FETCH_OBJ);
Finally loop results in HTML template
<? foreach($tops as $top):?>
<h1><?=$top->onderwerp?></h1>
<p><?=$top->omschrijving?></p>
<? endforeach;?>