PHP登錄系統未正確重定向

我不是你所說的“經驗豐富的”PHP 程式員（仍然是學生），所以請放輕松。

我正在為一個小組專案開發登錄系統。對于使用 PHP 和 MySQL 的登錄系統，我們已經用盡了所有其他選項，因此我直接從我們正在作業的書中提取了代碼。這適用于大約 3 次登錄和注銷嘗試，它的 login.php 和 login_functions.php 處理來自表單的登錄資訊，并且應該重定向到 login.php，但現在它只是掛在一個空白的 login.php 上頁。db.php 是我的資料庫連接，它在其他任何地方都可以正常作業，所以我知道這不是破壞它的原因。

我被難住了，因為它在前幾次成功重定向，然后在我沒有接觸任何代碼的情況下就停止了。我不知所措。

登錄表單

<?php 
// output errors
if (isset($errors) && !empty($errors)) {
    echo '<h1>Error!</h1>
    <p >The following error(s) occurred:<br>';
    foreach ($errors as $msg) {
        echo " - $msg<br>\n";
    }
    echo '</p><p>Please try again.</p>';
}
?>

<form action="login.php" method="post" id="loginform">
    <h2> Login </h2>
    <p><input type="email" name="email" class="inputfield" maxlength="60" placeholder="Enter your Email Address" required> </p>
    <p><input type="password" name="pass"  class="inputfield" maxlength="20" placeholder="Enter Your Password" required></p>
    <p id="button"><input type="submit" name="submit" value="Login"></p>
    <p id="register">Need an account? <strong><span class="register pink">Register</span></strong></p>
</form> 

登錄功能.php

<?php 
function redirect_user($page = 'index.php') {

    // Start defining the URL...
    // URL is http:// plus the host name plus the current directory:
    
    $url = 'http://' . $_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF']);

    // Remove any trailing slashes:
    
    $url = rtrim($url, '/\\');

    // Add the page:
    $url .= '/' . $page;

    // Redirect the user:
    
    header("Location: $url");
    exit(); // Quit the script.

} // End of redirect_user() function.

function check_login($dbc, $email = '', $pass = '') {

    $errors = []; // Initialize error array.

    // Validate the email address:
    if (empty($email)) {
        $errors[] = 'You forgot to enter your email address.';
    } else {
        $e = mysqli_real_escape_string($dbc, trim($email));
    }

    // Validate the password:
    if (empty($pass)) {
        $errors[] = 'You forgot to enter your password.';
    } else {
        $p = mysqli_real_escape_string($dbc, trim($pass));
    }

    if (empty($errors)) { // If everything's OK.

        // Retrieve the user_id and first_name for that email/password combination:
        $q = "SELECT user_id, user_name FROM USERS WHERE user_email='$e' AND user_password = '$p'";
        $r = @mysqli_query($dbc, $q); // Run the query.

        // Check the result:
        if (mysqli_num_rows($r) == 1) {

            // Fetch the record:
            $row = mysqli_fetch_array($r, MYSQLI_ASSOC);

            // Return true and the record:
            return [true, $row];

        } else { // Not a match!
            $errors[] = 'The email address and password entered do not match those on file.';
        }

    } // End of empty($errors) IF.

    // Return false and the errors:
    return [false, $errors];

} // End of check_login() function.

登錄.php

<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST') {

// Need two helper files:
require('login_functions.php');
require('db.php');

// Check the login:
list ($check, $data) = check_login($dbc, $_POST['email'], $_POST['pass']);

if ($check) { // OK!

    // Set the session data:
    
    session_start();
    session_set_cookie_params(0);
    $_SESSION['user_id'] = $data['user_id'];
    $_SESSION['user_name'] = $data['user_name'];

    // Redirect:
    //redirect_user('loggedin.php');
    header('Location: loggedin.php');
    exit();

} else { // Unsuccessful!

    // Assign $data to $errors for login_page.inc.php:
    $errors = $data;

}

mysqli_close($dbc); // Close the database connection.

} // End of the main submit conditional.

?>

非常感謝那些愿意幫助我的人，我真的很感激！

uj5u.com熱心網友回復：

首先，嘗試在您的每個檔案中啟用 PHP 錯誤。stackify.com/display-php-errors/amp

標籤：php mysql 调试 重定向 登录系统

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