$con = mysqli_connect("localhost","Korisnicko_ime","Sifra","Ime_Baze");
if (mysqli_connect_errno()) 
{
  echo "Nije uspjela konekcija" . mysqli_connect_error();
  exit();
}
$sql = "SELECT SQL_CALC_FOUND_ROWS * FROM korisnici WHERE k_ime='habib' 
        ORDER BY IDR_k_Korisnik DESC
        LIMIT 5";

$Result=$con->query($sql);

$Result_R=$con->query("Select FOUND_ROWS()");
$Rows=mysqli_fetch_array($Result_R); 
$No=$Rows["FOUND_ROWS()"]; 
echo $No;
mysqli_close($con);