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<?php
include_once 'includes/db_inc.php';
include_once 'header.php';
echo '<section><h2>Sign in</h2>';
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
echo '
<form action="" 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>
';
} else {
$errors = array();
if (!isset($_POST['user_name'])) {
$errors[] = 'Please provide a username.';
}
if (!isset($_POST['user_pass'])) {
$errors[] = 'Please provide a password.';
}
if (!empty($errors)) {
echo 'Please check the following problems: <ul>';
foreach ($errors as $err) {
echo '<li>' . $err . '</li>';
}
echo '</ul>';
} else {
$sql = "SELECT user_id, user_name FROM users WHERE user_name = '" . mysqli_real_escape_string($dbc, $_POST['user_name']) . "' AND user_pass = '" . sha1($_POST['user_pass']) ."'";
$result = mysqli_query($dbc, $sql);
if (!$result) {
echo 'An error occurred while signing in.';
echo mysqli_error($dbc);
} else {
if (mysqli_num_rows($result) == 0) {
echo 'There is no user with that username/password combination! Please try again';
} else {
$_SESSION['signed_in'] = true;
while ($row = mysqli_fetch_assoc($result)) {
$_SESSION['user_id'] = $row['user_id'];
$_SESSION['user_name'] = $row['user_name'];
}
echo 'You are now signed in as ' . $_SESSION['user_name'];
}
}
}
}
echo '</section>';
include_once 'footer.php';
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