Php 如何使“删除”按钮仅在表的最后一行显示和执行操作？

声明

之后，我遇到了一个问题：如果该行不是最后一行，则删除该查询

这是我早期的帖子：

因此，我提出了一个新的想法来防止这个问题，我想显示delete按钮，只对查询的最后一行执行delete操作

我所知道的

据我所知，如果我想删除PHP文件中的最后一行

我们可以这样做->

$conn->query（“altertabletablename AUTO_INCREMENT=1；”）

show.php（仅表格部分）

是，您可以添加if-else以隐藏或显示您的
删除按钮：

<!--Table-->
    <div class="container">
         <table class="table table-hover" border='2' align='center' style='color: white'>
                        <!--Header-->
                        <thead>
                        <tr>
                            <th><center>ID</center></th>
                            <th><center>Type</center></th>
                            <th><center>URL</center></th>
                            <th><center>Date</center></th>
                            <th><center>Lattitude</center></th>
                            <th><center>Longitude</center></th>
                            <th colspan="2"><center>Action</center></th>
                       </tr>
                       </thead>
                       <!--Queries-->
                       <?php
                            //$rowCount = count($results->data); //or mysqli_num_rows($results)
                            for($i=0;$i<count($results->data);$i++):
                                $news = $results->data[$i];
                       ?>
                                <tr>
                                      <td><b><?php echo $news['crimenews_id'];?></b></td>
                                      <td><?php echo $news['crimenews_cat'];?></td>
                                      <td><?php echo $news['crimenews_url'];?></td>
                                      <td><?php echo $news['crimenews_datetime'];?></td>
                                      <td><?php echo $news['crimenews_locationLat'];?></td>
                                      <td><?php echo $news['crimenews_locationLong'];?></td>
                                      <td>
                                           <a href="front.php?Edit=<?php echo $news['crimenews_id'];?>" class="btn btn-light"><b>Edit &nbsp&nbsp&nbsp&nbsp<i class="far fa-edit"></i></b></a>

                                           <!--Do I need if-else statement to if it is last row or not?-->
                                           <?php
                                           if($i===(count($results->data)-1)){?>
                                              <a href="process.php?Delete=<?php echo $news['crimenews_id'];?>" class="btn btn-danger"><b>Delete <i class="far fa-trash-alt"></i></b></a> <!--Delete button here!-->

                                           <?php }?>
                                      </td>
                                  </tr>
                            <?php endfor ?>
                    </table>
         </div>
<!--End table-->


身份证件
类型
统一资源定位地址
日期
格子
经度
行动

在上面的代码中，检查迭代是否等于行结果的最后计数。

检查一下。我希望它有帮助
是的，您可以添加，否则隐藏或显示您的
删除按钮：

<!--Table-->
    <div class="container">
         <table class="table table-hover" border='2' align='center' style='color: white'>
                        <!--Header-->
                        <thead>
                        <tr>
                            <th><center>ID</center></th>
                            <th><center>Type</center></th>
                            <th><center>URL</center></th>
                            <th><center>Date</center></th>
                            <th><center>Lattitude</center></th>
                            <th><center>Longitude</center></th>
                            <th colspan="2"><center>Action</center></th>
                       </tr>
                       </thead>
                       <!--Queries-->
                       <?php
                            //$rowCount = count($results->data); //or mysqli_num_rows($results)
                            for($i=0;$i<count($results->data);$i++):
                                $news = $results->data[$i];
                       ?>
                                <tr>
                                      <td><b><?php echo $news['crimenews_id'];?></b></td>
                                      <td><?php echo $news['crimenews_cat'];?></td>
                                      <td><?php echo $news['crimenews_url'];?></td>
                                      <td><?php echo $news['crimenews_datetime'];?></td>
                                      <td><?php echo $news['crimenews_locationLat'];?></td>
                                      <td><?php echo $news['crimenews_locationLong'];?></td>
                                      <td>
                                           <a href="front.php?Edit=<?php echo $news['crimenews_id'];?>" class="btn btn-light"><b>Edit &nbsp&nbsp&nbsp&nbsp<i class="far fa-edit"></i></b></a>

                                           <!--Do I need if-else statement to if it is last row or not?-->
                                           <?php
                                           if($i===(count($results->data)-1)){?>
                                              <a href="process.php?Delete=<?php echo $news['crimenews_id'];?>" class="btn btn-danger"><b>Delete <i class="far fa-trash-alt"></i></b></a> <!--Delete button here!-->

                                           <?php }?>
                                      </td>
                                  </tr>
                            <?php endfor ?>
                    </table>
         </div>
<!--End table-->


身份证件
类型
统一资源定位地址
日期
格子
经度
行动

在上面的代码中，检查迭代是否等于行结果的最后计数。

检查一下。我希望下面的代码有助于更改show.php，以便只在最后一行显示delete按钮

<!--Table-->
    <div class="container">
         <table class="table table-hover" border='2' align='center' style='color: white'>
                        <!--Header-->
                        <thead>
                        <tr>
                            <th><center>ID</center></th>
                            <th><center>Type</center></th>
                            <th><center>URL</center></th>
                            <th><center>Date</center></th>
                            <th><center>Lattitude</center></th>
                            <th><center>Longitude</center></th>
                            <th colspan="2"><center>Action</center></th>
                       </tr>
                       </thead>
                       <!--Queries-->
                       <?php
                            for($i=0;$i<count($results->data);$i++):
                                $news = $results->data[$i];
                       ?>
                                <tr>
                                      <td><b><?php echo $news['crimenews_id'];?></b></td>
                                      <td><?php echo $news['crimenews_cat'];?></td>
                                      <td><?php echo $news['crimenews_url'];?></td>
                                      <td><?php echo $news['crimenews_datetime'];?></td>
                                      <td><?php echo $news['crimenews_locationLat'];?></td>
                                      <td><?php echo $news['crimenews_locationLong'];?></td>
                                      <td>
                                           <a href="front.php?Edit=<?php echo $news['crimenews_id'];?>" class="btn btn-light"><b>Edit &nbsp&nbsp&nbsp&nbsp<i class="far fa-edit"></i></b></a>
                                           <?php if($i==(count($results->data)-1)){ ?>
                                           <a href="delete.php?Delete=<?php echo $news['crimenews_id'];?>" class="btn btn-danger"><b>Delete <i class="far fa-trash-alt"></i></b></a> <!-- your file is delete.php not process.php -->
                                           <?php } ?>
                                      </td>
                                  </tr>
                            <?php endfor ?>
                    </table>
         </div>
<!--End table-->

使用下面的代码更改show.php，以便仅在最后一行显示delete按钮

<!--Table-->
    <div class="container">
         <table class="table table-hover" border='2' align='center' style='color: white'>
                        <!--Header-->
                        <thead>
                        <tr>
                            <th><center>ID</center></th>
                            <th><center>Type</center></th>
                            <th><center>URL</center></th>
                            <th><center>Date</center></th>
                            <th><center>Lattitude</center></th>
                            <th><center>Longitude</center></th>
                            <th colspan="2"><center>Action</center></th>
                       </tr>
                       </thead>
                       <!--Queries-->
                       <?php
                            for($i=0;$i<count($results->data);$i++):
                                $news = $results->data[$i];
                       ?>
                                <tr>
                                      <td><b><?php echo $news['crimenews_id'];?></b></td>
                                      <td><?php echo $news['crimenews_cat'];?></td>
                                      <td><?php echo $news['crimenews_url'];?></td>
                                      <td><?php echo $news['crimenews_datetime'];?></td>
                                      <td><?php echo $news['crimenews_locationLat'];?></td>
                                      <td><?php echo $news['crimenews_locationLong'];?></td>
                                      <td>
                                           <a href="front.php?Edit=<?php echo $news['crimenews_id'];?>" class="btn btn-light"><b>Edit &nbsp&nbsp&nbsp&nbsp<i class="far fa-edit"></i></b></a>
                                           <?php if($i==(count($results->data)-1)){ ?>
                                           <a href="delete.php?Delete=<?php echo $news['crimenews_id'];?>" class="btn btn-danger"><b>Delete <i class="far fa-trash-alt"></i></b></a> <!-- your file is delete.php not process.php -->
                                           <?php } ?>
                                      </td>
                                  </tr>
                            <?php endfor ?>
                    </table>
         </div>
<!--End table-->

我必须在
delete.php
中更改任何内容吗？或者只在
show.php
中进行修改，我已经添加了它，但最后一行中没有显示删除按钮。您是否尝试了或部分
//或mysqli_num_行（$results）
错误
警告：mysqli_num_行（）预期参数1为mysqli_结果，给定对象
-->mysqli_num行（$results）中有错误让我们来。我必须在
delete.php
中更改任何内容吗？或者只在
show.php
中进行修改，我已经添加了它，但最后一行中没有显示删除按钮。您是否尝试了或部分
//或mysqli_num_行（$results）
错误
警告：mysqli_num_行（）预期参数1为mysqli_结果，给定对象
-->mysqli_num行（$results）中有错误让我们。
if(isset($_GET['Delete']))
      {
          // $id = mysqli_real_escape_string($conn,$_POST['id']); this is not needed and will through an error as $_POST['id'] is not set
          $del = $_GET['Delete'];
          $stmt = $conn->prepare("DELETE FROM crimenews WHERE crimenews_id=?"); //change $del to ?
          $stmt->bind_param("i",$del); //change ssss to i as I guess the id is an int and bind the correct parameter
          if ($stmt->execute()) {
            $_SESSION['message'] = "The news has deleted.";
            $_SESSION['msg_type'] = "danger";
            $stmt->close();
            header("location: front.php");
          }
      }