Untitled

index.php
#####################
<html>
    <head>
        <meta charset="utf-8">
        <title>Checker</title>
            <style>
                body {
                    background-color: #e9edf5;
                }
            </style>
    </head>
    <body>
        <center>
        <p align="center" style="color:#000000; font-size:60px"><font style="font-family:comic sans ms,cursive">Checker</font></p>
        <p align="center" style="color:#000000;"><font style="font-family:comic sans ms,cursive"><a href="https://vk.com/witcher2k20" target="_blank">by vk.com/witcher2k20</a></font></p>
            <table>
            <form action="result.php" method="post">
                <tbody>
                    <tr>
                        <td>
                            <font style="color:#000000">Ник<font>
                        </td>
                        <td>
                            <input type="text" name="nick" size="50">
                        </td>
                        <td>
                        <input type="submit">
                        </td>
                    </tr>
                </tbody>
            </table>
            </form>
        <center>
    </body>
</html>
###############################
result.php
###############################
<?php

include_once("db.php");

$username = $con->real_escape_string(htmlentities($_POST['nick']));
$result = $con->query("SELECT * FROM `authme` WHERE `realname` = '$username'");
$row = $result->fetch_assoc;
echo $row['password'];
?>
#################################
db.php
#################################
<?php
$host = '54.36.333.138';
$database = 'db';
$user = 'db';
$password = 'pass';
$con = mysqli_connect($host, $user, $password, $database);
$con->set_charset("utf8");
?>
##################################