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Create login.php #2

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100 changes: 100 additions & 0 deletions login.php
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Original file line number Diff line number Diff line change
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<?php
// if login button is clicked
if (isset($_POST['submit'])) {

// save username and password
$username = $_POST['username'];
$password = $_POST['password'];

// check if a valid username and password were entered
if ($username && $password) {

// connect to database
// mysqli_connect(server, username, password, database)
// default username: root
// default password: null
$connection = mysqli_connect('localhost', 'root', '', 'loginapp');
if (!$connection) {
die("Database connection failed");
}

// clean incoming info
$username = mysqli_real_escape_string($connection, $username);
$password = mysqli_real_escape_string($connection, $password);

// query for user info
$query = "SELECT * FROM users WHERE username = '{$username}' ";
$select_user_query = mysqli_query($connection, $query);
if (!$select_user_query) {
die('Query FAILED' . mysqli_error($connection));
}
// extract user info
while ($row = mysqli_fetch_array($select_user_query)) {
$db_id = $row['id'];
$db_username = $row['username'];
$db_password = $row['password'];
}
// validate username and password and redirect to appropriate pages
if ($username !== $db_username && $password !== $db_password) {
header("Location: login.php ");
} else if ($username == $db_username && $password == $db_password) {
header("Location: index.html");
} else {
header("Location: login.php");
}

} else {
echo "<div class='form-group'>Please fill in all fields!</div>";
}
}
?>







<!DOCTYPE html>
<html lang="en">
<head>
<title>Traffic Vision</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>

<link rel="stylesheet" href="./style.css">
<meta charset=UTF-8>
<meta name="viewport" content="width=device-width,
initial-scale=1.0
maximum-scale=1.0
user-scalable=no">
</head>

<body>
<header>
<img class="header-logo col-6 offset-3" src="./logo.png" />
</header>

<main class="container-fluid">
<div class="row main-body">
<div class="col-md-6 offset-md-3">
<div class="login-container">
<form action="login.php" method="post">
<div class="form-group">
<input type="text" name="username" class="form-control" placeholder="username" id="username"/>
</div>
<div class="form-group">
<input type="password" name="password" class="form-control" placeholder="password" id="password"/>
</div>
<button type="submit" name="submit" class="btn login-button">Log In</button>

</form>
</div>
</div>
</div>
</main>

</body>
</html>