<?php
// sample config
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "sample";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn -> connect_error) {
    die("Connection failed: " . $conn -> connect_error);
}

if (isset($_POST['submit'])) {
    $price = $_POST['price'];
    $quant = $_POST['quant'];
    $sub = $_POST['sub'];

    foreach ($price as $key => $p) {
        $quantdb = $quant[$key];
        $subdb = $sub[$key];

        $sql = "INSERT INTO table2 (price, quantity, subtotal) VALUES ('$p', '$quantdb', '$subdb')";

        $conn->query($sql);
    }
}
?>