Question

我是php新手，我似乎无法使我的登录脚本正常工作。当我输入现有用户数据并单击“登录”时，它会将我发送到空白页。我认为这可能与我的代码中的if (isset($_POST['login-submit']))有关。

即使在php.ini中打开了错误报告功能，该页面仍为空白。我将不胜感激！谢谢！

我的用户表结构：

My users table structure

下面，我为我的登录脚本和运行脚本的header.php附加了代码。 login-inc.php：

<?php

    ini_set('display_startup_errors', true);
    error_reporting(E_ALL);
    ini_set('display_errors', true);


    if (isset($_POST['login-submit'])){

    require 'dbh-inc.php';

    $uid = $_POST['uid'];
    $pwd = $_POST['pwd'];

    if (empty($uid) || empty($pwd)) {
        header("Location: ../index.php?error=emptyfields");
        exit();
    }
    else{
        $sql = "SELECT * FROM users WHERE user_uid=?";
        $stmt = mysqli_stmt_init($conn);
        if (!mysqli_stmt_prepare($stmt, $sql)){
        header("Location: ../index.php?error=sqlerror");
        exit();
    }

    else{

        mysqli_stmt_bind_param($stmt, "s", $uid);
        mysqli_stmt_execute($stmt);
        $result = mysqli_stmt_get_result($stmt);
        if ($row = mysqli_fetch_assoc($result)){
            $pwdCheck = password_verify($pwd, $row['user_pwd']);
            if ($pwdCheck == false){
            header("Location: ../index.php?error=wrongpwd");
            exit();
        }
        else if ($pwdCheck == true){
            session_start();
            //Stores the user's id, username, and user type in the session
            $_SESSION['user_id'] = $row['user_id'];
            $_SESSION['user_uid'] = $row['user_uid'];
            $_SESSION['user_usertype'] = $row['user_usertype'];
            header("Location: ../index.php/?login=success");
            exit();
        }
        else{
            header("Location: ../index.php?error=wrongpwd");
            exit();
        }
    }
    }
        //Closes the prepared statement and the db connection
        mysqli_stmt_close($stmt);
        mysqli_close($conn);

    }
    }


    ?>

header.php：

<?php

    ini_set('display_startup_errors', true);
    error_reporting(E_ALL);
    ini_set('display_errors', true);
    require "includes/dbh-inc.php";

?>

<title>  </title>
    <link rel="stylesheet" type="text/css" href="interfacestyles.css">
    <body>
<header>      
        <nav>
        <div class=”main-wrapper”>
          <div class=”nav-login”>
              <a class="account" href="">My account</a>
              <?php
              // if user not logged in, show login button and input fields
               if (!isset($_SESSION['user_id'])) {
            echo '<form action="includes/login-inc.php" method="POST">
                <input type=”text” name=”uid” placeholder=”Username”>
                <input type=”password” name=”pwd” placeholder=”Password”>
                <button type=”submit” name=”login-submit”>Login</button>
                &nbsp; &nbsp; &nbsp;
                New? Register <a href="signup.php">here</a>
            </form>';
               }
              // if user is logged in, show log out button
               else if (isset($_SESSION['user_id'])) {
           echo '<form action="includes/logout-inc.php" method="POST">
            <button type=”submit” name=”login-submit”>Log out</button>
          </form>';
        }
             ?> 
        </div>
        </div>
        </nav>         
</header>

Answer 1

我认为您很想在header.php文件上启动会话，请尝试将session_start();放在文件顶部

为什么我的登录脚本将我发送到空白页？关于

1 个答案: