$dsn = 'mysql:dbname=testdb;host=127.0.0.1';
$user = 'dbuser';
$password = 'dbpass';

try {
    $db = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
    exit;
}

$sql = 'SELECT * FROM apartments';
$apartments = $db->query($sql);

// Render template.
ob_start();
include 'view/apartments/index.phtml';
echo ob_get_clean();

?>

<?php foreach ($apartments as $item) :?>
    <?php if ($item['free'] == 1) :?>
        <div style="display:inline">
    <? else: ?>
        <div style="display:none">
    <?php endif; ?>
        <!--  Place div content here -->
    </div>
<?php endforeach; ?>