Php 登录时重定向到用户页面_Php_Html

Php 登录时重定向到用户页面

php html

Php 登录时重定向到用户页面,php,html,Php,Html,嗨，我是一名学生，擅长编程。如果已经登录的userlevel不是管理员，我只希望这段代码能够重定向到我的user index.php。目前，它进入我的管理仪表板，我从一个网站复制，它的工作。以下是我的示例代码： <?php // Initialize the session session_start(); // Check if the user is already logged in, if yes then redirect him to welcome page if(isse

嗨，我是一名学生，擅长编程。如果已经登录的userlevel不是管理员，我只希望这段代码能够重定向到我的user index.php。目前，它进入我的管理仪表板，我从一个网站复制，它的工作。以下是我的示例代码：

<?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: dashboard.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 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 user_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, $user_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["user_id"] = $user_id;
                            $_SESSION["username"] = $username;

                            // Redirect user to welcome page
                            header("location: admin/dashboard.php");
                        } else{
                            // Display an error message if password is not valid
                            $password_err = "Invalid username or password. Please try again.";
                        }
                    }
                } else{
                    // Display an error message if username doesn't exist
                    $password_err = "Invalid username or password. Please try again.";
                }
            } 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">
    <title>Login</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.css">
    <style type="text/css">
        body{ font: 14px sans-serif; background-image: url("bg.png");
    background-color: #cccccc;}
        .wrapper{ width: 400px; padding: 20px; margin: 0 auto; background-color: black; color: white; margin-top: 80px;}
        .center { display: block; margin-left: auto; margin-right: auto; width: 60%;}
    </style>
</head>
<body>
    <div class="wrapper">
      <br>
      <img alt="logo" src="logo.png" class="center"/>
      <h2 align="center">Secret Cafe Billing System</h2>

        <p align="center">Please fill in your credentials to login.</p>
        <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
            <div class="form-group <?php echo (!empty($username_err)) ? 'has-error' : ''; ?>">
                <label>Username</label>
                <input type="text" name="username" class="form-control" value="<?php echo $username; ?>">
                <span class="help-block"><?php echo $username_err; ?></span>
            </div>
            <div class="form-group <?php echo (!empty($password_err)) ? 'has-error' : ''; ?>">
                <label>Password</label>
                <input type="password" name="password" class="form-control">
                <span class="help-block"><?php echo $password_err; ?></span>
            </div>
            <br>
            <div align="center" class="form-group">
                <input type="submit" class="btn btn-primary" value="Login">
            </div>
            <br><br>

        </form>
    </div>
</body>
</html>

如果输入了无效的凭据，我只是编辑了用户名和密码上的错误消息，因为我们的顾问希望在这两个方面都出现一般性错误，而不是指定用户在哪个输入上获得了错误的凭据。调整了它，谢天谢地，它成功了。请帮帮我。

好的，我很感激地找到了答案。这是我的答案

<?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: dashboard.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 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 user_id, userlvl, 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, $user_id, $userlvl, $username, $hashed_password);
                    if(mysqli_stmt_fetch($stmt)){
                        if(password_verify($password, $hashed_password)){
                            // Password is correct, so start a new session
                            session_start();

                            if ($userlvl == 'Admin') {


                                // Store data in session variables
                            $_SESSION["loggedin"] = true;
                            $_SESSION["user_id"] = $user_id;
                            $_SESSION["username"] = $username;

                            // Redirect user to welcome page
                            header("location: admin/dashboard.php");
                            } else {



                                $_SESSION["loggedin"] = true;
                                $_SESSION["user_id"] = $user_id;
                                $_SESSION["username"] = $username;

                            // Redirect user to welcome page
                            header("location: admin/billing.php");
                            }


                        } else{
                            // Display an error message if password is not valid
                            $password_err = "Invalid username or password. Please try again.";
                        }
                    }
                } else{
                    // Display an error message if username doesn't exist
                    $password_err = "Invalid username or password. Please try again.";
                }
            } 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">
    <title>Login</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.css">
    <style type="text/css">
        body{ font: 14px sans-serif; background-image: url("bg.png");
    background-color: #cccccc;}
        .wrapper{ width: 400px; padding: 20px; margin: 0 auto; background-color: black; color: white; margin-top: 80px;}
        .center { display: block; margin-left: auto; margin-right: auto; width: 60%;}
    </style>
</head>
<body>
    <div class="wrapper">
      <br>
      <img alt="logo" src="logo.png" class="center"/>
      <h2 align="center">Secret Cafe Billing System</h2>

        <p align="center">Please fill in your credentials to login.</p>
        <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
            <div class="form-group <?php echo (!empty($username_err)) ? 'has-error' : ''; ?>">
                <label>Username</label>
                <input type="text" name="username" class="form-control" value="<?php echo $username; ?>">
                <span class="help-block"><?php echo $username_err; ?></span>
            </div>
            <div class="form-group <?php echo (!empty($password_err)) ? 'has-error' : ''; ?>">
                <label>Password</label>
                <input type="password" name="password" class="form-control">
                <span class="help-block"><?php echo $password_err; ?></span>
            </div>
            <br>
            <div align="center" class="form-group">
                <input type="submit" class="btn btn-primary" value="Login">
            </div>
            <br><br>

        </form>
    </div>
</body>
</html>

欢迎你有没有做过任何事情来解决这个问题，或者你是在要求我们为你做这个任务？在重定向到仪表板之前，请检查用户级别并重定向到其他页面。谢谢@kerbholz我尝试了此方法，但无法使其工作，我发现很难分析，因为它们与我最初复制的登录工作有不同的方法。基本上我需要你们帮我在这里添加代码。抱歉，正如页面所说，发送用户类型以管理员身份登录。您可以使用此变量了解是用户还是管理员。