<?php
$link =  mysql_connect('localhost', 'd6_guifitest', 'guifinet');
if (!$link) {
    die('No pudo conectarse: ' . mysql_error());
}
echo 'Conectado  satisfactoriamente';

if (!mysql_select_db('d6_guifitest')) {
    die('Could not select database: ' . mysql_error());
}

$query = "SELECT * FROM guifi_location where zone_id='11031'";

$result = mysql_query($query);
if (!$result) {
    die('Could not query:' . mysql_error());
}

while ($row = mysql_fetch_assoc($result)) {
    echo $row['nick'].$row['lat'].$row['lon']."<br>";
}

mysql_close($link);
?>

http://wiki.openstreetmap.org/wiki/OpenLayers_Dynamic_POI

http://dev.openlayers.org/apidocs/files/OpenLayers/BaseTypes/Bounds-js.html#OpenLayers.Bounds

http://sandbox.freemap.sk/dynamic_poi/features/?z=12&l=19.07222250718225&t=48.63287483132393&r=19.160113113145684&b=48.5747561300883&f=2:3;1:1;1:2;2:4;5:17;5:18;3:8;3:9;3:10