foreach ($siparisler as $detays) {
 
$firmaidaa = $detays->urun;
$urunal= $db->query("SELECT * FROM urunler where id=$firmaidaa", PDO::FETCH_ASSOC);
$boyutal= $urunal ->fetch(PDO::FETCH_ASSOC);
 
[B]echo $boyutal["en"]." x ".$boyutal["boy"]." x ".$boyutal["kalinlik"]." mm";[/B]
 

$m3[] = $islem["en"]*$islem["boy"]*$islem["kalinlik"];
$m2[] = $islem["en"]*$islem["boy"];

}

echo array_sum($m2); echo "</br>"; echo array_sum($m3);