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<!DOCTYPE html>
<html>
<head>
<title>cflip.net forum</title>
<link rel="stylesheet" href="style.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div id="wrapper">
<h1>Register an account</h1>
<nav>
<a href="index.php">Go back</a> Already have an account? <a href="signin.php">Sign in</a>
</nav>
<section>
<?php
include_once 'connect.php';
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
echo '
<form action="register.php" method="post">
<label for="user_name">Username: </label><br>
<input type="text" name="user_name"><br>
<label for="user_pass">Password: </label><br>
<input type="password" name="user_pass"><br>
<label for="user_pass_check">Re-enter password: </label><br>
<input type="password" name="user_pass_check"><br>
<input type="submit" name="submit">
</form>
';
} else {
$errors = array();
if (isset($_POST['user_name'])) {
if (!ctype_alnum($_POST['user_name'])) {
$errors[] = 'Invalid username. Only letters and numbers are supported.';
}
if (strlen($_POST['user_name']) > 30) {
$errors[] = 'Username must be 30 characters or less.';
}
} else {
$errors[] = 'Please provide a username.';
}
if (isset($_POST['user_pass'])) {
if ($_POST['user_pass'] != $_POST['user_pass_check']) {
$errors[] = 'The two passwords do not match.';
}
} else {
$errors[] = 'Please provide a password.';
}
if (!empty($errors)) {
echo 'Please check the following problems: <ul>';
foreach ($errors as $err) {
echo '<li>' . $err . '</li>';
}
echo '</ul>';
} else {
$sql = "INSERT INTO users(user_name, user_pass, user_date)
VALUES('" . mysqli_real_escape_string($dbc, $_POST['user_name']) . "',
'" . sha1($_POST['user_pass']) . "',
NOW())
";
$result = mysqli_query($dbc, $sql);
if (!$result) {
echo 'Failed to register account due to internal error.';
echo mysqli_error($dbc);
} else {
echo 'Account successfully created!';
}
}
}
?>
</section>
<footer>Copyright © 2021 cflip.net</footer>
</div>
</body>
</html>
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