Untitled

<!DOCTYPE html>
<html>
<body>

<form method = "post" action = "get.php">
   <input type="submit" value="Next" onclick = 'document.getElementById("id").value++; ' />
   <input type="text" name="id" id = "id" />
</form>

<?php

if ($_SERVER["REQUEST_METHOD"] == "POST") {
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "gin446";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
 $id= $_POST['id'];
 echo $id;
$sql = "SELECT `question`,`choice1`,`choice2`,`choice3`,`choice4` FROM quiz where id = $id";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
		echo " ".$row["question"]." <br> ";

		for ( $i = 1 ; $i < 5 ; $i++) {
			if ($row["choice".$i.""] != null )
				echo "<input type='radio'/>  " . $row["choice".$i.""]. "<br>";
		}

    }
} else {
    echo "0 results";
}
$conn->close();

}
?>
</form>
</body>
</html>