我的注册处理脚本问题

Question

我的脚本正在返回'错误请联系支持'输出，老实说，我找不到它的问题，所以我希望新的一组眼睛能够发现这一点。我确定这只是一个小小的愚蠢错误。感谢。

<?php
session_start();
$con = mysqli_connect('localhost', 'root', '', 'test');
if (isset($_SESSION['user']) != "") {
    header("Location: index.php");
}

if (isset($_POST['btn-signup'])) {
    $escusername = mysqli_real_escape_string($con, $_POST['username']);
    $escemail = mysqli_real_escape_string($con, $_POST['email']);
    $hpassword = hash('sha512', $_POST['password']);

    $query = "INSERT INTO `users` (username, email, password) VALUES('$escusername', '$escemail', '$hpassword')";
    $result = mysqli_query($query);
    if ($result) {

        ?>
        <script>alert('your account has now been registered.');</script>
        <?php
    } else {
        ?>
        <script>alert('error please contact support.');</script>
        <?php
    }
}
?>

Answer 1

$result = mysqli_query($con, $query);

Answer 2

@ChrisForrence有解决方案：$result = mysqli_query($con, $query);