PHP kód 4

<?php

$db_connect = mysqli_connect('localhost', 'katalog', 'KatalogJanda123', 'produkty', 3306);
$db_data = mysqli_query($db_connect, 'SELECT * FROM siesta ORDER BY id');
$id = mysqli_num_rows($db_data);
$db_lastdata = mysqli_query($db_connect, 'SELECT popis FROM siesta ORDER BY id DESC LIMIT 1');
$popis = true;

if ($db_connect) {
    echo '<table>';
    echo '<tr>';
    $i = 0;
    while ($radek = mysqli_fetch_array($db_data)) {
        $nazev = $radek['nazev'];
        echo "<th>$nazev</th>";
        $i++;

        if (!($i % 2)) {
            echo '</tr>';
            echo '<tr>';
            $in = 1;
            while ($in <= 2) {
                if ($popis == true) {
                    $cislo = $i - 1;
                    $db_popis = mysqli_query($db_connect, "SELECT popis FROM siesta WHERE id=$cislo");
                    $get_popis = mysqli_fetch_array($db_popis);
                    $popis = $get_popis['popis'];
                    echo "<td>$popis</td>";
                    $in++;
                    $popis = false;
                } else {
                    $cislo = $i;
                    $db_popis = mysqli_query($db_connect, "SELECT popis FROM siesta WHERE id=$cislo");
                    $get_popis = mysqli_fetch_array($db_popis);
                    $popis = $get_popis['popis'];
                    echo "<td>$popis</td>";
                    $in++;
                    $popis = true;
                }
            }
            echo '</tr>';
        }
        if ($id > 2 and !($i % 2) and $i > 2) {
            echo '<tr>';
        }
        if ($i == $id) {
            $lastradek = mysqli_fetch_array($db_lastdata);
            $lastpopis = $lastradek['popis'];
            echo '</tr>';
            echo '<tr>';
            echo "<td>$lastpopis</td>";
            echo '</tr>';
        }
    }
    echo '</table>';
} else {
    echo 'Spojení s databází nebylo navázáno!';
    echo '<br />';
    echo 'Kontaktuje prosím administrátora na e-mail <a href="mailto:[email protected]">[email protected]</a> s chybovým hlášením.';
    echo 'Popis chyby: ', mysqli_connect_error();
    exit();
}

if ($db_connect)
    mysqli_close($db_connect);
?>