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<html>
    <?php
        if($_SERVER['QUERY_STRING']!=""){

            $utente = $_GET ['utente'];
            $pass = $_GET['password'];

            $Link = mysqli_connect("ip", "xxx", "yyyy", "anzzzdrea");//mi connetto al database

            if(!$Link){
                echo "<head></head><body>";
                echo "Error: Unable to connect to MySql".PHP_BOL."<br>";
                echo "Debugging Errno: ".mysqli_connect_errno().PHP_BOL."<br>";
                echo "Debugging Error: ".mysqli_connect_error().PHP_BOL."<br>";
                echo"</body>";
                die();
                //die("error");
            }

            //echo "Connessione stabilita(Connection succesfully)";

            $queryString = "SELECT * FROM Utenti WHERE User='$utente' AND Password='$pass'";

            $loggato = mysqli_query($Link, $queryString);

            $numeroDiRighe = mysqli_num_rows($loggato);

            echo "<head>";
            if($numeroDiRighe == 1){
                echo "<meta http-equiv='refresh' content ='3, url=Ciao.php'>";
            }
            echo "</head><body>";

            if($numeroDiRighe == 1){
                echo "Ti sei loggato correttamente <br>";
            }else{
                echo "Login Fallito";
                VisualizzaForm();
            }

            mysqli_close($Link);
            echo "</body>";

        }else{
            echo "<head></head><body>";
            VisualizzaForm();
            echo"</body>";
        }
    ?>
</html>
<?php
    function VisualizzaForm(){
        echo "<form action='AccediDatabase.php' method='get'>";
        echo "User: <input type = 'text' name= 'utente'><br>";
        echo "Password: <input type='password' name='password'><br>";
        echo "<input type= 'submit' value='accedi'><br>";
        echo "</form>";
?>