如何在 PHP 中使用複選框刪除多行：解決常見錯誤並確保成功執行？-php教程-PHP中文網

如何在 PHP 中使用複選框刪除多行：解決常見錯誤並確保成功執行？

Patricia Arquette

發布： 2024-10-26 04:00:27

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How to Delete Multiple Rows Using Checkboxes in PHP: Addressing Common Errors and Ensuring Successful Execution?

使用PHP 透過選擇複選框刪除多行：常見錯誤故障排除

使用PHP 從MySQL 資料庫表中刪除多行時，使用複選框選擇連結需要仔細編碼確保成功執行。此程式碼片段提供了常見問題的解決方案：

<code class="php"><html>
  <head>
    <title>Links Page</title>
  </head>
  <body>
    <h2>Choose and delete selected links.</h2> 
    <?php
      $dbc = mysqli_connect('localhost','root','admin','sample') or die('Error connecting to MySQL server');
      $query = "select * from links ORDER BY link_id";
      $result = mysqli_query($dbc,$query) or die('Error querying database');
      $count=mysqli_num_rows($result);
    ?>
    <table width="400" border="0" cellspacing="1" cellpadding="0">
      <tr>
        <td>
          <form name="form1" method="post" action="">
            <table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
              <tr>
                <td bgcolor="#FFFFFF"> </td>
                <td colspan="3" bgcolor="#FFFFFF">
                  <strong>Delete multiple links</strong>
                </td>
              </tr>
              <tr>
                <td align="center" bgcolor="#FFFFFF">#</td>
                <td align="center" bgcolor="#FFFFFF">
                  <strong>Link ID</strong>
                </td>
                <td align="center" bgcolor="#FFFFFF">
                  <strong>Link Name</strong>
                </td>
                <td align="center" bgcolor="#FFFFFF">
                  <strong>Link URL</strong>
                </td>
              </tr> 
              <?php
              while ($row=mysqli_fetch_array($result)) {
              ?>
              <tr>
                <td align="center" bgcolor="#FFFFFF">
                  <input name="checkbox[]" type="checkbox" value="<?php echo $row['link_id']; ?>">
                </td>
                <td bgcolor="#FFFFFF"> <?php echo $row['link_id']; ?> </td>
                <td bgcolor="#FFFFFF"> <?php echo $row['link_name']; ?> </td>
                <td bgcolor="#FFFFFF"> <?php echo $row['link_url']; ?> </td>
              </tr> 
              <?php
                }
              ?> 
              <tr>
                <td colspan="4" align="center" bgcolor="#FFFFFF">
                  <input name="delete" type="submit" value="Delete">
                </td>
              </tr>
            </table>
          </form>
        </td>
      </tr>
    </table>    
    <?php
      // Check if delete button active, start this
      if(isset($_POST['delete']))
      {
        $checkbox = $_POST['checkbox'];
        for($i=0; $i<count($checkbox); $i++) {
          $del_id = $checkbox[$i];
          $sql = "DELETE FROM links WHERE link_id='$del_id'";
          $result = mysqli_query($dbc, $sql); // Pass the database connection here
        }
        // if successful redirect to view_links.php 
        if($result){
          echo '<meta http-equiv="refresh" content="0;URL=view_links.php">';
        }
      }
      mysqli_close($dbc);
    ?>
  </body>
</html></code>

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