$tablo = "r10";
$kullanici="root";
$sifre="";
$host = "localhost";

$baglanti = new mysqli($host, $kullanici, $sifre, $tablo);

//örnek sorgu
$sorgu = $baglanti->query("Select * from kullanicilar");

while($dizi = $sorgu->fetch_assoc()) {
        echo $dizi["kullanici_adi"]."<br>";
}