如何将评论与postid与该邮件的帖子绑定？

这是一场真正的斗争。我一直试图调试1小时的更好的一部分，但我找不到任何解决方案。我正在制作一个与博客帖子关联的评论系统。当您发表评论时，您将返回到相同的帖子。帖子页面根据postid动态填充。评论是使用相同的postid添加的，所以他们只填写他们的相关帖子。我查询评论是错误的，但我没有得到如何。如何将评论与postid与该邮件的帖子绑定？

Warning 
: mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given 
in C:\xampp\htdocs\prog1\comments.php on line 31

代码：

<?php 
require("connect.php"); 
$postid = $_GET['id']; 

if(isset($_POST['postcomment'])){ 
    $comment = $_POST['comment']; 
    $author = $_SESSION['username']; 
    $commentQuery = mysqli_query($conn, "INSERT INTO comments (com_content, com_timestamp, com_author, com_postid) VALUES ('$comment', now(), '$author', '$postid')"); 
    if($commentQuery){ 
     header('Location: postpage.php?id='.$postid); 
    } 


} 
?> 

<div class="comments-separator"> 
</div> 
<div class="flex-enable comments-wrapper flex-column"> 
<span class="comment-header">Comments</span> 
    <div class="comment-new-wrapper"> 
     <form class="flex-enable flex-column" method="POST"> 
      <textarea class="blog-input-text comment-entry" cols="40" rows="3" name="comment"></textarea> 
      <input class="comment-button small-white-subtitle" type="submit" name="postcomment" value="Post Comment"> 
     </form> 
    </div> 
</div> 
<?php 
    $summonComm = "SELECT * FROM comments WHERE com_postid='".$postid."' ORDER BY id DESC"; 
    $resultComm = mysqli_query($conn, $summonComm); 
    while ($row = mysqli_fetch_array($resultComm)){ 
     $comment= $row['com_content']; 
     $timestamp= $row['timestamp']; 
     $author= $row['com_author']; 
    ?> 
    <span class="blog-timestamp"><?php echo $timestamp; ?> • Written by <a href="<?php echo $author; ?>.php"><?php echo $author; ?></a></span> 
    <span class="blog-entry"><?php echo $comment; ?></span> 
    </div> 
<?php 
} 
?>

来源

2017-12-27 mechanicarts

那么它在做什么错？ – RiggsFolly

_Small point_你需要和'exit;'后面的'header（）'作为头不停止执行当前脚本，它只是向浏览器发送一个头文件 – RiggsFolly

新增了我的错误。 – mechanicarts