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<?php session_start()?>
<!DOCTYPE html>
<html>
<head>
<title>Sign in - cflip.net forum</title>
<link rel="stylesheet" href="styles/style.css">
</head>
<body>
<?php include_once 'templates/header.php'?>
<h2>Sign in</h2>
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="post">
<label for="user_name">Username: </label><br>
<input type="text" name="user_name"><br>
<label for="user_pass">Password: </label><br>
<input type="password" name="user_pass"><br>
<input type="submit" name="submit">
</form>
<?php
include_once 'includes/db_inc.php';
function validate($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$errors = array();
if (empty($_POST['user_name'])) {
$errors[] = 'Please provide a username.';
} else {
$user_name = validate($_POST['user_name']);
}
if (empty($_POST['user_pass'])) {
$errors[] = 'Please provide a password.';
} else {
$user_pass = $_POST['user_pass'];
}
if (!empty($errors)) {
echo 'Please check the following problems: <ul>';
foreach ($errors as $err) {
echo '<li>' . $err . '</li>';
}
echo '</ul>';
} else {
$pass_hash = password_hash($user_pass, PASSWORD_DEFAULT);
$sql = "SELECT user_id, user_name, user_pass FROM users WHERE user_name = '" . $user_name . "';";
$result = mysqli_query($dbc, $sql);
if (!$result) {
echo 'An error occurred while signing in: ' . mysqli_error($dbc);
} else {
if (mysqli_num_rows($result) == 0) {
echo 'There is no user with that name. Did you mean to <a href="register.php">create a new account?</a>';
} else {
while ($row = mysqli_fetch_assoc($result)) {
if (!password_verify($user_pass, $row['user_pass'])) {
echo 'Password does not match!';
} else {
$_SESSION['signed_in'] = true;
$_SESSION['user_id'] = $row['user_id'];
$_SESSION['user_name'] = $row['user_name'];
header("Location: index.php");
}
}
}
}
}
}
?>
</body>
</html>
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