$query_rew = $db->query("SELECT * FROM gorusler WHERE yayin='1' ORDER BY id DESC", PDO::FETCH_ASSOC);
if ( $query_rew->rowCount() ){
$a = 0;
foreach( $query_rew as $rowrew ){
++$a;
echo $rowrew['yorum']."
";
if (($a%2) === 0) {
echo '

';
}
}
}