include "set.php";
$num = 5;

$page = $_GET['page'];

$result = mysql_query("SELECT COUNT(*) FROM products");
$posts = mysql_result($result, 0);

$total = intval(($posts - 1) / $num) + 1;

$page = intval($page);

if(empty($page) or $page < 0) $page = 1;
if($page > $total) $page = $total;

$start = $page * $num - $num;

$result = mysql_query("SELECT * FROM products LIMIT $start, $num");

while ( $postrow[] = mysql_fetch_array($result))
  echo "<table>";

for($i = 0; $i < $num; $i++)
{
    echo "<tr>
        <td>".$postrow[$i]['title']."</td>
        <td>".$postrow[$i]['price']."</td></tr>";
}
echo "</table>";

if ($page != 1) $pervpage = '<a href= ./page?page=1><<</a>
           <a href= ./page?page='. ($page - 1) .'><</a> ';

if ($page != $total) $nextpage = ' <a href= ./page?page='. ($page + 1) .'>></a>
                   <a href= ./page?page=' .$total. '>>></a>';

if($page - 2 > 0) $page2left = ' <a href= ./page?page='. ($page - 2) .'>'. ($page - 2) .'</a> | ';
if($page - 1 > 0) $page1left = '<a href= ./page?page='. ($page - 1) .'>'. ($page - 1) .'</a> | ';
if($page + 2 <= $total) $page2right = ' | <a href= ./page?page='. ($page + 2) .'>'. ($page + 2) .'</a>';
if($page + 1 <= $total) $page1right = ' | <a href= ./page?page='. ($page + 1) .'>'. ($page + 1) .'</a>';

echo $pervpage.$page2left.$page1left.'<b>'.$page.'</b>'.$page1right.$page2right.$nextpage;

<?php
    for ($i = 1; $i< $total; $i++) {
        if ($i == $page) {
?>
<span class="page_active"><?php=$i?></span>
<?php
    } else {
        if($i == 1) echo "<span><a href='/'>$i</a></span>";
        else echo "<span><a href='./page?=$i/'>$i</a></span>";
 }
}
?>