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编辑当前文件:/home/qrafawbu/tblonline.org/account/login1.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: account/");
    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 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: account/");
                        } 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">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

<link rel="stylesheet" href="assets/css/bootstrap.min.css">
        <link rel="stylesheet" href="assets/css/animate.min.css">
        <link rel="stylesheet" href="assets/css/fontawesome.min.css">
        <link rel="stylesheet" href="assets/css/flaticon.css">
        <link rel="stylesheet" href="assets/css/magnific-popup.min.css">
        <link rel="stylesheet" href="assets/css/nice-select.css">
        <link rel="stylesheet" href="assets/css/slick.min.css">
        <link rel="stylesheet" href="assets/css/owl.carousel.min.css">
        <link rel="stylesheet" href="assets/css/meanmenu.css">
		<link rel="stylesheet" href="assets/css/odometer.min.css">
        <link rel="stylesheet" href="assets/css/style.css">
        <link rel="stylesheet" href="assets/css/responsive.css">

<title>Login | Sign Consult Group</title>

<div class="preloader">
            <div class="loader">
                <div class="shadow"></div>
                <div class="box"></div>
            </div>
        </div>

<section class="login-area">
            <div class="row m-0">
                <div class="col-lg-6 col-md-12 p-0">
                    <div class="login-image">
                        <img src="assets/img/map-2.png" alt="image">
                    </div>
                    
                </div>

<h3>Welcome back</h3>
                                    
                                       <?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">
                                            <input type="email" name="username"  <?php echo (!empty($username_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $email; ?>" placeholder="Your email address" class="form-control">
                                             <span class="invalid-feedback"><?php echo $username_err; ?></span>
                                        </div>

<div class="form-group">
                                            <input type="password" name="password"  <?php echo (!empty($password_err)) ? 'is-invalid' : ''; ?> placeholder="Your password" class="form-control">
                                            <span class="invalid-feedback"><?php echo $password_err; ?></span>
                                        </div>

<button type="submit" class="btn btn-primary">Login</button>
                                        
                                        <div class="forgot-password">
                                            <a href="reset-password.php">Forgot Password?</a>
                                        </div>

</form>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </section>

<script src="assets/js/jquery.min.js"></script>
        <script src="assets/js/popper.min.js"></script>
        <script src="assets/js/bootstrap.min.js"></script>
        <script src="assets/js/jquery.meanmenu.js"></script>
        <script src="assets/js/jquery.nice-select.min.js"></script>
        <script src="assets/js/slick.min.js"></script>
        <script src="assets/js/jquery.magnific-popup.min.js"></script>
		<script src="assets/js/jquery.appear.min.js"></script>
        <script src="assets/js/odometer.min.js"></script>
        <script src="assets/js/owl.carousel.min.js"></script>
        <script src="assets/js/parallax.min.js"></script>
        <script src="assets/js/wow.min.js"></script>
        <script src="assets/js/form-validator.min.js"></script>
        <script src="assets/js/contact-form-script.js"></script>
        <script src="assets/js/main.js"></script>
    </body>
</html>