我试图在另一个准备好的语句中包含准备好的语句

在此给定的准备好的语句中,它将获得文章标题。当它获得文章标题时,还应该将该变量发送到另一个准备好的语句中,然后该语句查找给定文章的观看次数。

<table class="table table-colored table-centered table-inverse m-0">
<thead>
<tr>

<th>Title</th>
<th>Category</th>
<th>Writer</th>
<th>action</th>
<th>Views</th>
</tr>
</thead>
<tbody>


<?php
$stmt = $con -> prepare('select tblposts.id as postid,tblposts.PostTitle as title,tblposts.PostUrl as postname,tblcategory.CategoryName as category,tblwritter.Writter as writter from tblposts left join tblcategory on tblcategory.id=tblposts.CategoryId left join tblwritter on tblwritter.WritterId=tblposts.WritterId where tblposts.Is_active=?');
$cnt=1;
$stmt -> bind_param('i',$cnt);
$stmt -> execute();
$stmt -> store_result();
$stmt -> bind_result($postid,$title,$postname,$category,$writter);
?>

 <tr>
<?php while ($stmt->fetch()){?>
<td><b><?php echo $postname;?></b></td>
<td><?php echo $category?></td>
<td><?php echo $writter?></td>


<td>
<a href="edit-post.php?pid=<?php echo $postid;?>"><i class="fa fa-pencil" style="color: #29b6f6;"></i></a>
    &nbsp;<a href="manage-posts.php?pid=<?php echo$postid;?>&&action=del" onclick="return confirm('Do you reaaly want to delete ?')"> <i class="fa fa-trash-o" style="color: #f05050"></i></a>
</td>

<?php
$stmt = $con -> prepare('select COUNT(ip) FROM tblviews WHERE postname = ?');
$stmt -> bind_param('s',$postname);
$stmt -> execute();
$stmt -> store_result();
$stmt -> bind_result($ip);
?>
<?php while ($stmt->fetch()){?>
<td><?php echo $ip ?></td>
<?php } ?>

 </tr>


<?php }?>
                                            </tbody>
                                        </table>

此代码的预期结果是将邮政名发送到准备好的语句中,然后调用任何给定文章中的视图量。

zhanghongyan2124 回答:我试图在另一个准备好的语句中包含准备好的语句

简短的回答:您正在循环中覆盖$stmt

长答案,并带有提示: 通过首先编写所有php,然后最后发布所有html(仅使用php进行迭代和变量替换),可以避免(或至少更容易检测到)这种情况。

更好的方法是将数据库访问和业务逻辑放在单独的类(即模型)中,并让您的视图向模型(或控制器,具体取决于您对MVC的解释)询问其所需的数据。

我无法对其进行测试,但是您应该可以使用一个查询:

select 
    tblposts.id as postid,tblposts.PostTitle as title,tblposts.PostUrl as postname,tblcategory.CategoryName as category,tblwritter.Writter as writter,COUNT(tblwritter.ip) as views
from tblposts
    left join tblcategory on tblcategory.id=tblposts.CategoryId 
    left join tblwritter on tblwritter.WritterId=tblposts.WritterId 
    left join tblviews on tblviews.postname = tblposts.PostUrl'
where tblposts.Is_Active=?
group by tblposts.PostUrl,tblposts.id,tblposts.PostTitle,tblCategory.CategoryName,tblwritter.Writter

(请注意,MySQL可能只让您在分组依据中命名tblposts.PostUrl即可摆脱困境)

这样,您的页面可以简化为以下形式:

<?php
    // do your query here
?>
<table class="table table-colored table-centered table-inverse m-0">
  <thead>
    <tr>

      <th>Title</th>
      <th>Category</th>
      <th>Writer</th>
      <th>Action</th>
      <th>Views</th>
    </tr>
  </thead>
  <tbody>
    <?php while ($stmt->fetch()): ?>
    <tr>
      <td><b><?= $postname ?></b></td>
      <td><?= $category ?></td>
      <td><?= $writter?></td>
      <td>
        <a href="edit-post.php?pid=<?= $postid?>"><i class="fa fa-pencil" style="color: #29b6f6;"></i></a>
&nbsp;<a href="manage-posts.php?pid=<?=$postid?>&&action=del" onclick="return confirm('Do you reaaly want to delete ?')"> <i class="fa fa-trash-o" style="color: #f05050"></i></a>
      </td>
      <td><?= $views ?></td>
    </tr>
    <?php endwhile; ?>
  </tbody>
</table>
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