<?php
$id = $_GET["id"];

$servername = "localhost";
$username = "root";
$password = "";

$con=mysqli_connect($servername,$username,$password,"rubrica");

if (mysqli_connect_errno())
  {
  echo "Connessione non riuscita: " . mysqli_connect_error();
  }
  else
  {
     $sql="DELETE FROM contatto WHERE id = ". $id ."";
     $result = mysqli_query($con,$sql);
  }
  header("Location: index.php");
?>