<?php
$id_user=$_POST['id_user'];
include('bd.php');

$date_click=date('Y-m-d');
$time_click=date('H:i:s');
$res1 = mysql_query("SELECT DATE_SUB('$date_click',Interval 1 DAY) as date_c;",$db);
while ($row1 = mysql_fetch_array($res1))
{      
  $date_time_click=$row1['date_c'].' '.$time_click;
}
$res=mysql_query("SELECT sites.id_site,sites.url_site,sites.type FROM sites where sites.id_site not in (select click_sites.id_site from click_sites where click_sites.date_disp>='$date_time_click' and click_sites.id_user<>'$id_user') and sites.balans>0 and sites.moderat=1") || die(mysql_error());
$row = mysql_fetch_array($res);
if (mysql_num_rows($res)>0)
echo $row['url_site'].",".$row['id_site'].",".$row['type'];
?>