mirror of
https://github.com/gabrielkheisa/tugas-pjpb.git
synced 2025-04-28 07:09:13 +07:00
156 lines
5.1 KiB
PHP
156 lines
5.1 KiB
PHP
|
<?php
|
||
|
|
// Initialize the session
|
||
|
|
session_start();
|
||
|
|
|
||
|
|
// Check if the user is already logged in, if yes then redirect him to welcome page
|
||
|
|
if(isset($_SESSION["loggedin"]) && $_SESSION["loggedin"] === true){
|
||
|
|
header("location: welcome.php");
|
||
|
|
exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Include config file
|
||
|
|
require_once "config.php";
|
||
|
|
|
||
|
|
// Define variables and initialize with empty values
|
||
|
|
$username = $password = "";
|
||
|
|
$username_err = $password_err = $login_err = "";
|
||
|
|
|
||
|
|
// Processing form data when form is submitted
|
||
|
|
if($_SERVER["REQUEST_METHOD"] == "POST"){
|
||
|
|
|
||
|
|
// Check if username is empty
|
||
|
|
if(empty(trim($_POST["username"]))){
|
||
|
|
$username_err = "Please enter username.";
|
||
|
|
} else{
|
||
|
|
$username = trim($_POST["username"]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check if password is empty
|
||
|
|
if(empty(trim($_POST["password"]))){
|
||
|
|
$password_err = "Please enter your password.";
|
||
|
|
} else{
|
||
|
|
$password = trim($_POST["password"]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Validate credentials
|
||
|
|
if(empty($username_err) && empty($password_err)){
|
||
|
|
// Prepare a select statement
|
||
|
|
$sql = "SELECT id, username, password, role, hash FROM user_pjpb WHERE username = ?";
|
||
|
|
|
||
|
|
if($stmt = mysqli_prepare($link, $sql)){
|
||
|
|
// Bind variables to the prepared statement as parameters
|
||
|
|
mysqli_stmt_bind_param($stmt, "s", $param_username);
|
||
|
|
|
||
|
|
// Set parameters
|
||
|
|
$param_username = $username;
|
||
|
|
|
||
|
|
// Attempt to execute the prepared statement
|
||
|
|
if(mysqli_stmt_execute($stmt)){
|
||
|
|
// Store result
|
||
|
|
mysqli_stmt_store_result($stmt);
|
||
|
|
|
||
|
|
// Check if username exists, if yes then verify password
|
||
|
|
if(mysqli_stmt_num_rows($stmt) == 1){
|
||
|
|
// Bind result variables
|
||
|
|
mysqli_stmt_bind_result($stmt, $id, $username, $hashed_password, $role, $hash);
|
||
|
|
if(mysqli_stmt_fetch($stmt)){
|
||
|
|
if(password_verify($password, $hashed_password)){
|
||
|
|
// Password is correct, so start a new session
|
||
|
|
session_start();
|
||
|
|
|
||
|
|
// Store data in session variables
|
||
|
|
$_SESSION["loggedin"] = true;
|
||
|
|
$_SESSION["id"] = $id;
|
||
|
|
$_SESSION["username"] = $username;
|
||
|
|
$_SESSION["role"] = $role;
|
||
|
|
$_SESSION["hash"] = $hash;
|
||
|
|
|
||
|
|
// Redirect user to welcome page
|
||
|
|
header("location: welcome.php");
|
||
|
|
} else{
|
||
|
|
// Password is not valid, display a generic error message
|
||
|
|
$login_err = "Invalid username or password.";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else{
|
||
|
|
// Username doesn't exist, display a generic error message
|
||
|
|
$login_err = "Invalid username or password.";
|
||
|
|
}
|
||
|
|
} else{
|
||
|
|
echo "Oops! Something went wrong. Please try again later.";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Close statement
|
||
|
|
mysqli_stmt_close($stmt);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Close connection
|
||
|
|
mysqli_close($link);
|
||
|
|
}
|
||
|
|
?>
|
||
|
|
|
||
|
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<meta charset="UTF-8">
|
||
|
|
<title>Login</title>
|
||
|
|
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
|
||
|
|
<style>
|
||
|
|
body{ font: 14px sans-serif; }
|
||
|
|
.wrapper{ padding: 20px;
|
||
|
|
max-width:1200px;
|
||
|
|
}
|
||
|
|
|
||
|
|
@media only screen and (max-width: 1200px) {
|
||
|
|
body {
|
||
|
|
|
||
|
|
font-size: 5em;
|
||
|
|
}
|
||
|
|
h2 {
|
||
|
|
font-size: 2em;
|
||
|
|
}
|
||
|
|
.wrapper {
|
||
|
|
}
|
||
|
|
.form-control {
|
||
|
|
|
||
|
|
font-size: 1em;
|
||
|
|
}
|
||
|
|
.btn {
|
||
|
|
font-size: 0.8em;
|
||
|
|
height: 2em;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="wrapper">
|
||
|
|
<h2>Login</h2>
|
||
|
|
<p>Please fill in your credentials to login.</p><br>
|
||
|
|
|
||
|
|
<?php
|
||
|
|
if(!empty($login_err)){
|
||
|
|
echo '<div class="alert alert-danger">' . $login_err . '</div>';
|
||
|
|
}
|
||
|
|
?>
|
||
|
|
|
||
|
|
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
|
||
|
|
<div class="form-group">
|
||
|
|
<label>Username</label>
|
||
|
|
<input type="text" name="username" class="form-control <?php echo (!empty($username_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $username; ?>">
|
||
|
|
<span class="invalid-feedback"><?php echo $username_err; ?></span>
|
||
|
|
</div>
|
||
|
|
<div class="form-group">
|
||
|
|
<label>Password</label>
|
||
|
|
<input type="password" name="password" class="form-control <?php echo (!empty($password_err)) ? 'is-invalid' : ''; ?>">
|
||
|
|
<span class="invalid-feedback"><?php echo $password_err; ?></span>
|
||
|
|
</div>
|
||
|
|
<div class="form-group">
|
||
|
|
<input type="submit" class="btn btn-primary" value="Login">
|
||
|
|
</div>
|
||
|
|
<br>
|
||
|
|
<p>Don't have an account? <a href="register.php">Sign up now</a>.</p>
|
||
|
|
</form>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|