onlinequize/index.php at master · Shareiar-Islam/onlinequize · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
<?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 = "";

// 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 Your name.";
    } 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 FROM users 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, $hashed_password);
                    if(mysqli_stmt_fetch($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;

                            // Redirect user to welcome page
                            header("location: welcome.php");
                        } else{
                            // Display an error message if password is not valid
                            $password_err = "The password you entered was not valid.";
                        }
                    }
                } else{
                    // Display an error message if username doesn't exist
                    $username_err = "No account found with that username.";
                }
            } 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">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Online Quize</title>

    <!-- Font Icon -->
    <link rel="stylesheet" href="fonts/material-icon/css/material-design-iconic-font.min.css">

    <!-- Main css -->
    <link rel="stylesheet" href="css/style.css">
</head>
<body>

    <div class="main">
		<!-- Sing in  Form -->
        <section class="sign-in">
            <div class="container">
                <div class="signin-content">
                    <div class="signin-image">
                        <figure><img src="images/signin-image.jpg" alt="sing up image"></figure>
                        <a href="register.php" class="signup-image-link">Create an account</a>
                    </div>

                    <div class="signin-form">
                        <h2 class="form-title">Sign In</h2>
                        <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post" class="register-form" id="login-form">
                            <div class="form-group <?php echo (!empty($username_err)) ? 'has-error' : ''; ?>">
                                <label for="your_name"><i class="zmdi zmdi-account material-icons-name"></i></label>
                                <input type="text" name="username" value="<?php echo $username; ?>" id="your_name" placeholder="Your Name"/>
                                <span class="help-block"><?php echo $username_err; ?>
                            </div>
                            <div class="form-group <?php echo (!empty($password_err)) ? 'has-error' : ''; ?>">
                                <label for="your_pass"><i class="zmdi zmdi-lock"></i></label>
                                <input type="password" name="password" id="your_pass" placeholder="Password"/>
                                <span class="help-block"><?php echo $password_err; ?>
                            </div>
                            <div class="form-group">
                                <input type="checkbox" name="remember-me" id="remember-me" class="agree-term" />
                                <label for="remember-me" class="label-agree-term"><span><span></span></span>Remember me</label>
                            </div>
                            <div class="form-group form-button">
                                <input type="submit" name="signin" id="signin" class="form-submit" value="Log in"/>
                            </div>
                        </form>
                    </div>
                </div>
            </div>
        </section>

    </div>

    <!-- JS -->
    <script src="vendor/jquery/jquery.min.js"></script>
    <script src="js/main.js"></script>
</body>
</html>