<form method="POST" id="pdo-add">
    <input name="first" id="pdo-add-first" placeholder="First Name">
    <input name="last" id="pdo-add-last" placeholder="Last Name">
    <input name="product" id="pdo-add-product" placeholder="Product">
    <input name="add" type="submit" value="Add">
</form>

$(function() {

   $("#pdo-add").on("submit", function (event) {
    //event.preventDefault();

    var add_first = $("#pdo-add-first").val();
    var add_last = $("#pdo-add-last").val();
    var add_product = $("#pdo-add-product").val();

    $.ajax({
        url: "pdoAddSend.php",
        type: "POST",
        data: {
            "add_first": add_first,
            "add_last": add_last,
            "add_product": add_product
        },
        success: function (data) {
        //  console.log(data); // data object will return the response when status code is 200
            if (data == "Error!") {
                alert("Unable to insert product record!");
                alert(data);
            } else {
                //$("#newsletter-form")[0].reset();
                $('.announcement_success').html('Product Successfully Added!');
            }
        },
        error: function (xhr, textStatus, errorThrown) {
            alert(textStatus + " | " + errorThrown);
            //console.log("error"); //otherwise error if status code is other than 200.
        }
    });
});
});

ini_set('display_errors', 1);
error_reporting(E_ALL);

$add_first = $_POST['add_first'];
$add_last = $_POST['add_last'];
$add_product = $_POST['add_product'];
try {
    $host = 'localhost';
    $name = '';
    $user = '';
    $password = '';

    $dbc = new PDO("mysql:host=$host;dbname=$name", $user, $password);

}catch(PDOException $e) {
    echo $e->getMessage();

}

if(isset($_POST['add'])) {

    $stmt = $dbc->prepare("INSERT INTO users (first, last, product) VALUES (:first,:last,:product)");

    $stmt->bindParam(':first', $add_first);
    $stmt->bindParam(':last', $add_last);
    $stmt->bindParam(':product', $add_product);

    $stmt->execute();
}