插入数据库给我“本地主机不工作”

当您单击提交按钮时，我试图通过两个输入将信息插入数据库。但是当我点击它，它说它不能连接到本地主机(一切都工作，所以我知道它必须是某种形式的语法问题)代码:

    <form action="prices.inc.php" method="post">
    <input class="price-list-input" type="text" id="priceupdate1" name="priceupdate1" required></input>
    <input class="price-list-input2" type="text" id="priceupdate2" name="priceupdate2" required></input>
    <input class="price-list-button" type="submit" id="priceupdate-button" name="priceupdate-button" value="Uppdatera"></input>
    </form>

<?php
require_once('check_login.inc.php');
    define('SECURE', true);
    require_once('connection.php');

if(isset($_POST['priceupdate-button'])){
    $info = trim(htmlspecialchars($_POST['priceupdate1'], $_POST['priceupdate2']));
    // prepared statement
    $stmt = $db->prepare('INSERT INTO prices (name, price) VALUES = (?, ?)');
    $stmt->bind_param('ss', $_POST['priceupdate1'], $_POST['priceupdate2']);
    $stmt->execute();
    $stmt->store_result();
    $stmt->bind_result($info);
}
?>