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156 | <?php
session_start();
require_once('pagetitles.php');
$page_title = SL_LOGIN_PAGE;
?>
<!DOCTYPE html>
<html>
<head>
<title><?= $page_title ?></title>
<link rel="stylesheet"
href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css"
integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS"
crossorigin="anonymous">
</head>
<body>
<?php
require_once('navmenu.php');
?>
<div class="card">
<div class="card-body">
<h1><?= $page_title ?></h1>
<hr/>
<?php
if (empty($_SESSION['user_id']) && isset($_POST['login_submission']))
{
// Get user name and password
$user_name = $_POST['user_name'];
$password = $_POST['password'];
if (!empty($user_name) && !empty($password))
{
require_once('dbconnection.php');
require_once('queryutils.php');
$dbc = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME)
or trigger_error(
'Error connecting to MySQL server for' . DB_NAME,
E_USER_ERROR );
// Check if user already exists
$query = "SELECT id, user_name, password_hash, access_privileges, studentListing_id "
. "FROM user WHERE user_name = ?";
$results = parameterizedQuery($dbc, $query, 's', $user_name)
or trigger_error(mysqli_error($dbc), E_USER_ERROR);
// IF user was found, validate password
if (mysqli_num_rows($results) == 1)
{
$row = mysqli_fetch_array($results);
if (password_verify($password, $row['password_hash']))
{
$_SESSION['user_id'] = $row['id'];
$_SESSION['user_name'] = $row['user_name'];
$_SESSION['user_access_privileges'] = $row['access_privileges'];
$_SESSION['user_student_listing_id'] = $row['studentListing_id'];
// Redirect to the home page
$home_url = dirname($_SERVER['PHP_SELF']);
header('Location: ' . $home_url);
}
else
{
echo "<h4><p class='text-danger'>An incorrect user name
or password was entered.</p></h4><hr/>";
}
}
else if (mysqli_num_rows($results) == 0) // User does not exist
{
echo "<h4><p class='text-danger'>An account does not exist for this username:"
. "<span class='font-weight-bold'> ($user_name)</span>. "
. "Please use a different user name.</p></h4><hr/>";
}
else
{
echo "<h4><p class='text-danger'>Something went terribly wrong!</p></h4><hr/>";
}
}
else
{
// Output error message
echo "<h4><p class='text-danger'>You must enter both a user name and password.</p></h4><hr/>";
}
}
if (empty($_SESSION['user_id'])):
?>
<form class="needs-validation" novalidate method="POST"
action="<?= $_SERVER['PHP_SELF'] ?>">
<div class="form-group row">
<label for="user_name" class="col-sm-2 col-form-label-lg">User
Name</label>
<div class="col-sm-4">
<input type="text" class="form-control" id="user_name"
name="user_name" placeholder="Enter a user name"
required>
<div class="invalid-feedback">
Please provide a valid user name.
</div>
</div>
</div>
<div class="form-group row">
<label for="password" class="col-sm-2 col-form-label-lg">Password</label>
<div class="col-sm-4">
<input type="password" class="form-control"
id="password" name="password"
placeholder="Enter a password" required>
<div class="invalid-feedback">
Please provide a valid password.
</div>
</div>
</div>
<button class="btn btn-primary" type="submit"
name="login_submission">Log In
</button>
</form>
<?php
elseif (isset($_SESSION['user_name'])):
echo "<h4><p class='text-success'>You are logged in as:
<strong>{$_SESSION['user_name']}</strong>.</p></h4>";
endif;
?>
</div>
</div>
<script>
// JavaScript for disabling form submissions if there are invalid fields
(function () {
'use strict';
window.addEventListener('load', function () {
// Fetch all the forms we want to apply custom Bootstrap validation styles to
var forms = document.getElementsByClassName('needs-validation');
// Loop over them and prevent submission
var validation = Array.prototype.filter.call(forms, function (form) {
form.addEventListener('submit', function (event) {
if (form.checkValidity() === false) {
event.preventDefault();
event.stopPropagation();
}
form.classList.add('was-validated');
}, false);
});
}, false);
})();
</script>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js"
integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"
integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k"
crossorigin="anonymous"></script>
</body>
</html>
|