如何在PHP中使用post方法捕获表中每个用户的特定主id？

我对编程一无所知。基本上，我正在使用PHP和MySQL处理crud操作

下面是我从数据库检索数据的代码。请注意，我使用了 用于捕获每个用户的主键（

id

）的隐藏输入字段

<div class="table-responsive">
  <table id="datatable-buttons"  class="table table-striped jambo_table bulk_action">
    <thead>
      <tr class="headings">                                  
        <th class="column-title">Client Name</th>
        <th class="column-title">PAN </th>    
        <th class="column-title">GST Registration Type </th>    
        <th class="column-title no-link last"><span class="nobr">Add</span>
        </th>                                  
      </tr>
    </thead>
    <?php
      $sql = mysqli_query($conn,'select * from customer_master');
      while ($row = mysqli_fetch_array($sql))
      {?>
      <tbody>
        <tr class="even pointer">                                    
          <td class=" "><?php echo $row['companyName'];?></td>
          <td class=" "><?php echo $row['pan'];?></td>    
          <td class=" "><?php echo $row['gstTaxType'];?></td>                   
          <td><input type="hidden" name="pid" value="<?php echo $row['customerId'];?>"></a> | <a type="" class="" data-toggle="modal" data-target="#edit_customer_profile"><i class="fa fa-pencil" aria-hidden="true"></i></a></td>
        </tr>                                                 
      </tbody>
    <?php  }?>                                
  </table>
</div>

---

因此，请帮助我仅检索所选用户的数据。

您必须在SELECT语句中使用WHERE子句。确保使用准备好的语句来避免SQL注入

以下是根据您的需要更改的[PHP文档]（）示例：

<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* create a prepared statement */
if ($stmt = $mysqli->prepare("SELECT * FROM  customer_master WHERE customerId=?")) {

    /* bind parameters for markers */
    $stmt->bind_param("i", $_POST['customerId']);

    /* execute query */
    $stmt->execute();

    /* bind result variables */
    $stmt->bind_result($customerId);
    $stmt->bind_result($companyName);
    $stmt->bind_result($pan);
    $stmt->bind_result($gstTaxType);

    /* fetch value */
    $stmt->fetch();

    /* close statement */
    $stmt->close();
}

/* close connection */
$mysqli->close();
?>

<div class="table-responsive">
    <table id="datatable-buttons"  class="table table-striped jambo_table bulk_action">
        <thead>
            <tr class="headings">                                  
                <th class="column-title">Client Name</th>
                <th class="column-title">PAN </th>    
                <th class="column-title">GST Registration Type </th>    
                <th class="column-title no-link last"><span class="nobr">Add</span></th>                                  
            </tr>
        </thead>
        <tbody>
            <tr class="even pointer">                                    
                <td class=" "><?php echo $companyName;?></td>
                <td class=" "><?php echo $pan;?></td>    
                <td class=" "><?php echo $gstTaxType;?></td>                   
                <td><input type="hidden" name="pid" value="<?php echo $customerId;?>"></a> | <a type="" class="" data-toggle="modal" data-target="#edit_customer_profile"><i class="fa fa-pencil" aria-hidden="true"></i></a></td>
            </tr>                                                 
        </tbody>
    </table>
</div>

客户名称
平底锅
商品及服务税登记类型
添加
'select*from customer\u master where customerId=$\u POST['customerId']”您正在寻找类似的东西吗？对，兄弟，我只在寻找这个。它有效吗@amitNow查看关于参数化queriesno bro它现在工作。给出未定义的错误
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* create a prepared statement */
if ($stmt = $mysqli->prepare("SELECT * FROM  customer_master WHERE customerId=?")) {

    /* bind parameters for markers */
    $stmt->bind_param("i", $_POST['customerId']);

    /* execute query */
    $stmt->execute();

    /* bind result variables */
    $stmt->bind_result($customerId);
    $stmt->bind_result($companyName);
    $stmt->bind_result($pan);
    $stmt->bind_result($gstTaxType);

    /* fetch value */
    $stmt->fetch();

    /* close statement */
    $stmt->close();
}

/* close connection */
$mysqli->close();
?>

<div class="table-responsive">
    <table id="datatable-buttons"  class="table table-striped jambo_table bulk_action">
        <thead>
            <tr class="headings">                                  
                <th class="column-title">Client Name</th>
                <th class="column-title">PAN </th>    
                <th class="column-title">GST Registration Type </th>    
                <th class="column-title no-link last"><span class="nobr">Add</span></th>                                  
            </tr>
        </thead>
        <tbody>
            <tr class="even pointer">                                    
                <td class=" "><?php echo $companyName;?></td>
                <td class=" "><?php echo $pan;?></td>    
                <td class=" "><?php echo $gstTaxType;?></td>                   
                <td><input type="hidden" name="pid" value="<?php echo $customerId;?>"></a> | <a type="" class="" data-toggle="modal" data-target="#edit_customer_profile"><i class="fa fa-pencil" aria-hidden="true"></i></a></td>
            </tr>                                                 
        </tbody>
    </table>
</div>