问如何创建仅限密码的登录表单？

EN

<?php

require_once 'dbconnect.php';

if (isset($_SESSION['userSession'])!="") {
    header("Location: home.php");
    exit;
}

if (isset($_POST['btn-login'])) {

    $password = strip_tags($_POST['password']);

    $password = $DBcon->real_escape_string($password);

    $query = $DBcon->query("SELECT user_id, password FROM tbl_users WHERE password='$password'");
    $row=$query->fetch_array();

    $count = $query->num_rows;

    if (password_verify($password, $row['password']) && $count==1) {
        $_SESSION['userSession'] = $row['user_id'];
        header("Location: home.php");
    } else {
        $msg = "<div class='alert alert-danger'>
                    <span class='glyphicon glyphicon-info-sign'></span> 
&nbsp; Invalid Password !
                </div>";
    }
    $DBcon->close();
}