MySQL a PHP stránkovanie

<?php

$con = mysql_connect("localhost","root","");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("a", $con);

$query = mysql_query("SELECT * FROM a_posts");

$result = mysql_query("SELECT * FROM `a_posts` ORDER BY `a_posts`.`id` DESC LIMIT 4");

while($row = mysql_fetch_array($result))
{

echo $row['title'];

}
?>