how to store the printed value in mysql table using php - php

Question

I am printing values in the address bar using the get variable,it works perfectly, then my problem is i want store the printed values into a mysql table, but it only stores null values, please help me where i am going wrong in below attached code.
<?php
session_start();
include('header.php');
?>
<form name="cart.php">
<table>
<tr>
<th> ID </th>
<th> Vehicle Description </th>
<th> Price </th>
</tr>
<tr>
<td><?php echo $_GET['id']; ?> </td>
<td><?php echo $_GET['name']; ?> </td>
<td><?php echo $_GET['price']; ?> </td>
</tr>
</table>
<?php
$servername = "";
$username = "";
$password = "";
$dbname = "";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$x=$_GET['id'];
$y=$_GET['name'];
$z=$_GET['price'];
$sql = "INSERT INTO products (id,description,price)
VALUES ('$x', '$y', '$y')";
if (mysqli_query($conn, $sql)) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}
mysqli_close($conn);
?>
<form><input type="button" value="Go back" onClick="window.location.href='automobile_list.php'"></form>
</form>
<?php
include('footer.php');
?>

Answer 1

<?php
session_start();
include('header.php');
$x=$_GET['id'];
$y=$_GET['name'];
$z=$_GET['price'];
?>
<form name="cart.php">
<table>
<tr>
<th> ID </th>
<th> Vehicle Description </th>
<th> Price </th>
</tr>
<tr>
<td><?php echo $x; ?> </td>
<td><?php echo $y; ?> </td>
<td><?php echo $z; ?> </td>
</tr>
</table>
<?php
$servername = "";
$username = "";
$password = "";
$dbname = "";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$sql = "INSERT INTO products (id,description,price)
VALUES ('$x', '$y', '$y')";
if (mysqli_query($conn, $sql)) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}
mysqli_close($conn);
?>
<form><input type="button" value="Go back" onClick="window.location.href='automobile_list.php'"></form>
</form>
<?php
include('footer.php');
?>
use the above code you will get your code working.

Answer 2

the problem is in query
so update that line as:
$sql = "INSERT INTO products (id,description,price)
VALUES ('".$x."', '".$y."', '".$y."')";