adduser.php

<?php
require "include/bittorrent.php";
dbconn();
loggedinorreturn();
if (get_user_class() < UC_ADMINISTRATOR) {
    stderr("Error", "Access denied.");
}
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    if ($_POST["username"] == "" || $_POST["password"] == "" || $_POST["email"] == "") {
        stderr("Error", "Missing form data.");
    }
    if ($_POST["password"] != $_POST["password2"]) {
        stderr("Error", "Passwords mismatch.");
    }
    $email = htmlspecialchars(trim($_POST["email"]));
    $email = safe_email($email);
    if (!check_email($email)) {
        stderr("Error", "Invalid email address!");
    }
    
    $username = $_POST["username"];
    
    if (!validusername($username)) {
        stderr("Error", "Invalid username.");
    }
    $username = \NexusPHP\Components\Database::escape($username);
    $res = \NexusPHP\Components\Database::query("SELECT id FROM users WHERE username=$username");
    $arr = mysqli_fetch_row($res);
    if ($arr) {
        stderr("Error", "Username already exists!");
    }
    $password = $_POST["password"];
    $email = \NexusPHP\Components\Database::escape($_POST["email"]);
    $res = \NexusPHP\Components\Database::query("SELECT id FROM users WHERE email=$email");
    $arr = mysqli_fetch_row($res);
    if ($arr) {
        stderr("Error", "The e-mail address is already in use.");
    }
    $secret = mksecret();
    $passhash = \NexusPHP\Components\Database::escape(md5($secret . $password . $secret));
    $secret = \NexusPHP\Components\Database::escape($secret);

    \NexusPHP\Components\Database::query("INSERT INTO users (added, last_access, secret, username, passhash, status, stylesheet, class,email) VALUES(NOW(), NOW(), $secret, $username, $passhash, 'confirmed', ".$defcss.",".$defaultclass_class.",$email)") or sqlerr(__FILE__, __LINE__);
    $res = \NexusPHP\Components\Database::query("SELECT id FROM users WHERE username=$username");
    $arr = mysqli_fetch_row($res);
    if (!$arr) {
        stderr("Error", "Unable to create the account. The user name is possibly already taken.");
    }
    header("Location: " . get_protocol_prefix() . "$BASEURL/userdetails.php?id=".htmlspecialchars($arr[0]));
    die;
}
stdhead("Add user");

?>
<h1>Add user</h1>
<form method=post action=adduser.php>
<table border=1 cellspacing=0 cellpadding=5>
<tr><td class=rowhead>User name</td><td><input type=text name=username size=40></td></tr>
<tr><td class=rowhead>Password</td><td><input type=password name=password size=40></td></tr>
<tr><td class=rowhead>Re-type password</td><td><input type=password name=password2 size=40></td></tr>
<tr><td class=rowhead>E-mail</td><td><input type=text name=email size=40></td></tr>
<tr><td colspan=2 align=center><input type=submit value="Okay" class=btn></td></tr>
</table>
</form>
<?php stdfoot();