responsive: {
        0: {
          items: 4,
          margin: 10
        },
        600: {
          items: 8,
          margin: 10
        },
        1000: {
          items: 15,
          margin: 10
        }
      }

items: <?php echo $Araclar->rowCount() > 0 ? 4 : 0; ?>

$Araclar = $db->query("SELECT Uye_AracResmi, Uye_Plaka, Uye_GununSozu, Uye_Kimlik, Uye_Instagram FROM Uyeler WHERE Uye_GununSozu IS NOT NULL AND Uye_GununSozu <> '' AND Uye_AracResmi IS NOT NULL ORDER BY Uye_Kimlik");