Question

我正在使用HostGator的cPanel平台将网站上传到互联网。我很难使所有功能正常运行。在开始传输文件之前，一切都在我的个人服务器上运行。该网站打开时会显示一个登录屏幕，但是每次尝试登录时，都会出现此错误：

警告：无法修改标头信息-标头已由...发送

（不包括文件路径信息）

在这一点上，我担心数据库连接不正确。我在How to fix "Headers already sent" error in PHP上找到了这个答案，但是对于在哪里寻找错误（我不太精通PHP）感到有些困惑。

这是导致问题的代码（完整的错误表明问题在第10行，即“ header（“ location：error.php”）;“：

    <?php
/* User login process, checks if user exists and password is correct */

// Escape email to protect against SQL injections
$email = $mysqli->escape_string($_POST['email']);
$result = $mysqli->query("SELECT * FROM users WHERE email='$email'");

if ( $result->num_rows == 0 ){ // User doesn't exist
    $_SESSION['message'] = "User with that email doesn't exist!";
    header("location: error.php");
}
else { // User exists
    $user = $result->fetch_assoc();

    if ( password_verify($_POST['password'], $user['password']) ) {

        $_SESSION['email'] = $user['email'];
        $_SESSION['first_name'] = $user['first_name'];
        $_SESSION['last_name'] = $user['last_name'];
        $_SESSION['active'] = $user['active'];

        // This is how we'll know the user is logged in
        $_SESSION['logged_in'] = true;

        header("location: Bootstrap/index2.php");
    }
    else {
        $_SESSION['message'] = "You have entered wrong password, try again!";
        header("location: error.php");
    }
} ?>

完整错误还显示“此文件的完整输出是...”：

<?php
/* Main page with two forms: sign up and log in */
require 'db.php';
session_start();
?>
<!DOCTYPE html>
<html>
<head>
  <title>Sign-Up/Login Form</title>
  <?php include 'Looks/css.html'; ?>
</head>

<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
    if (isset($_POST['login'])) { //user logging in

        require 'login.php';

    }

    elseif (isset($_POST['register'])) { //user registering

        require 'register.php';

    }
}
?>
<body>
  <div class="form">

      <ul class="tab-group">
        <li class="tab"><a href="#signup">Sign Up</a></li>
        <li class="tab active"><a href="#login">Log In</a></li>
      </ul>

      <div class="tab-content">

         <div id="login">
          <h1>Welcome Back!</h1>

          <form action="index.php" method="post" autocomplete="off">

            <div class="field-wrap">
            <label>
              Email Address<span class="req">*</span>
            </label>
            <input type="email" required autocomplete="off" name="email"/>
          </div>

          <div class="field-wrap">
            <label>
              Password<span class="req">*</span>
            </label>
            <input type="password" required autocomplete="off" name="password"/>
          </div>

          <!--<p class="forgot"><a href="forgot.php">Forgot Password?</a></p>-->

          <button class="button button-block" name="login" />Log In</button>

          </form>

        </div>

        <div id="signup">
          <h1>Sign Up</h1>

          <form action="index.php" method="post" autocomplete="off">

          <div class="top-row">
            <div class="field-wrap">
              <label>
                First Name<span class="req">*</span>
              </label>
              <input type="text" required autocomplete="off" name='firstname' />
            </div>

            <div class="field-wrap">
              <label>
                Last Name<span class="req">*</span>
              </label>
              <input type="text"required autocomplete="off" name='lastname' />
            </div>
          </div>

          <div class="field-wrap">
            <label>
              Email Address<span class="req">*</span>
            </label>
            <input type="email"required autocomplete="off" name='email' />
          </div>

          <div class="field-wrap">
            <label>
              Set A Password<span class="req">*</span>
            </label>
            <input type="password"required autocomplete="off" name='password'/>
          </div>

          <button type="submit" class="button button-block" name="register" />Register</button>

          </form>

        </div>

      </div><!-- tab-content -->

</div> <!-- /form -->
  <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>

    <script src="index.js"></script>

</body>
</html>

我不知道从哪里开始。我多次检查空白，所以我确定这不是问题。任何帮助将不胜感激。

不确定如何解决Host Gator平台上的“警告：无法修改标头信息-标头已发送...”错误

0 个答案: