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我知道这个问题已被问过，但我找不到方法出于此。一旦用户注销，我需要登录页面，但它保留在成员页面并显示错误。我需要在成员页面的第一个条件下进入页面。我能做什么？请帮忙。一直在尝试很多东西。可能是我错过了一些东西。当我注销并重新装入成员页它给之下，而留在成员页面的错误：警告：无法修改标题信息 - 标题已发送（输出开始在/storage/ssd4/169/2461169/public_html/header.php:1）在
警告：不能更改头信息 - 头已经发出（输出开始/存储/ ssd4 /2461169分之169/的public_html/header.php文件：1）中的线/storage/ssd4/169/2461169/public_html/member.php 6
构件页
<?php
include ("db_con.php");
include ("index.php");
if(!isset($_SESSION['email']))
{
header('location:https://goldentitles.000webhostapp.com/signin.php');
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Member Area</title>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="css/member.css">
<link rel="stylesheet" type="text/css" href="css/inpagetable.css">
<script type="text/javascript" src="js/member.js"></script>
</head>
<body>
<!--member tabs-->
<div class="tabmember">
<button class="tablinks" onclick="opentab1(event, 'profile')">Profile</button>
<button class="tablinks" onclick="opentab2(event, 'edit')">Edit</button>
<button class="tablinks" onclick="opentab(event, 'myorder')">My Order</button>
<a href="logout_user.php"><button class="tablinks">Log out</button></a>
</div>
<!--profile tab-->
<div id="profile">
<?php
$email=filter_var($_SESSION['email'],FILTER_SANITIZE_EMAIL) ;
$user_query="select * from user where email='$email'";
$run_query=mysqli_query($dbcon,$user_query);
if(mysqli_num_rows($run_query)>0)
{
echo' <table border="2" class=inpagetable>
<thead>
<tr>
<th>id</th>
<th>email</th>
<th>status</th>
<th>zip</th>
<th>name</th>
<th>password</th>
<th>address</th>
<th>country</th>
<th>expires</th>
</tr>
</thead>';
while($row = mysqli_fetch_assoc($run_query)){
echo "<tbody><tr><td>{$row['id']}</td><td>{$row['email']}</td><td>{$row['status']}</td><td>{$row['zip']}</td><td>{$row['name']}</td><td>{$row['password']}</td><td>{$row['address']}</td><td>{$row['country']}</td><td>{$row['expires']}</td></tr></tbody>\n";
}
echo '</table>';
}
else {echo"<script>alert('error retrieving from database! Contact admin!')</script>";
}
//close con
mysqli_close($dbcon);
?>
<button class="mainpage" onclick="mainpg()">Back to Main Page</button><br>
</div>
<!--edit form-->
<div id="edit">
<form id="actform" action="edit_user.php" method="post">
<input type="text" id="email" name="email_" placeholder="Your new email..">
<input type="text" id="name" name="fullname" placeholder="Your new full name..">
<input type="password" id="pass" name="password" placeholder="Your new password..">
<input type="text" id="address" name="fulladdr" placeholder="Your new full address..">
<input type="text" id="zip" name="zipcode" placeholder="Your new zip code..">
<select id="country" name="country">
<option value="australia">Australia</option>
<option value="canada">Canada</option>
<option value="usa">USA</option>
<option value="uk">UK</option>
</select>
<input type="submit" name="confirm" value="Confirm">
</form>
</div>
</body>
</html>
我的头页
<!DOCTYPE html>
<html>
<head>
<title>Golden Titles</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" type="text/css" href="css/header.css">
</head>
<body>
<div class="top">
<div id="header">
<a href="signin.php"> Sign in</a> |
<a href="signup.php"> Sign up </a> |
<a href="#"> Help </a> <br>
</div>
<div id="smedia">
<a href="https://www.facebook.com" ><img src="http://www.ransomesjacobsen.com/themes/jacobsen/images/icons/facebook-icon-small.png" alt="facebook" id="fb"> </a>
<a href="https://www.twitter.com" > <img src="http://www.freeiconspng.com/_img/icon-top-twitter.png" alt="twitter" id="tw"></a>
<a href="https://www.instagram.com" > <img src="http://dunedin.art.museum/templates/dpag/images/instagram-icon.png" alt="instagram" id="ins"></a>
</div>
<div id="search">
<form action="search.php" method="post">
<input type="search" name="searchdb" placeholder="enter book name only">
</form>
</div>
</div>
<div id="kng">
<img src="img/kng.jpg" alt="knowledge is power">
</div>
</body>
</html>
显示'db_conf.php'和'index.php'代码 –
其中包括header.php文件？这是在index.php？如果是这样的话：为什么在一个页面中有两次html文档类型等等。除此之外：您的重定向应该在您开始输出任何html之前完成 –