如何使用 jquery、ajax 和 PDO 删除行

Question

我在 mysql 数据库中有两个表，“汽车”和“地址”，它们与主键和数据库中的“删除限制”有关系，所以我不能删除一些有汽车的地址，这很好。 DB 中的地址有“street”、“number”和“city”列。我想删除每个没有汽车的位置，但我不知道我的代码哪里错了，它不起作用。我检查了所有路径，一切正常。任何建议表示赞赏。

这是我的模态删除按钮：

<a href="#" data-toggle="modal" data-target="#delete_loc<?php echo $value['id']?>" role="button" class="btn btn-danger btn-sm">
                <i class="fa fa-trash-o"></i> Delete
            </a>

                <div class="modal fade" id="delete_loc<?php echo $value['id']?>" tabindex="-1" role="dialog" aria-labelledby="mydelModalLabel" aria-hidden="true">
                    <div class="modal-dialog">
                        <div class="modal-content" style="text-align:center;">
                            <div class="modal-header">
                                <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
                                <h2 class="modal-title" id="mydelModalLabel" style="color:#a80b27;text-transform:uppercase;font-size:1.6rem;">Warning   !</h2>
                            </div>
                            <div class="modal-body">
                                <h5>Are you shure you want delete address ID <b><?php echo $value['id']?></b>?</h5>
                            </div>
                            <div class="modal-footer">
                            <input type="hidden" name="loc_id" id="loc_id" value="<?php echo $value['id']?>">
                                <a href="" role="button" class="btn btn-danger" id="del_loc">
                                    Yes, I'm shure!
                                </a>
                                <button type="button" class="btn btn-default" data-dismiss="modal">No</button>
                            </div>
                        </div>
                    </div>
                </div>

这是 jquery 和 ajax：

    $(document).ready(function() {
      $('#del_loc').bind('click',function(e){
      e.preventDefault();
        var id = $('#loc_id').val();

        var data = 'loc_id='+id;

     $.ajax({
       type: "POST",
       url: "include/locations/delete.php",
       data: data,
       success: function(result){
        if(result == 1){
          window.location.replace("address.php?id=");
    }
       else{
         err_msg = JSON.parse(result);
       if(err_msg.nAddress){
        $('.panel-footer').append('<span class="help-block"  style="float:right;"><strong>'+err_msg.nAddress+'</strong></span>');
        }
      }
    }
   });
  });
});

这是delete.php：

    <?php

     require '../../config/init.php';
     require '../functions/locations.php';
     require '../services/xss.php';

     $loc_id = _e($_POST['loc_id']);

     $data = deleteLoc($loc_id);

       if(is_array($data)){
        print_r(1);
       }
       else{
          echo $data;
       }

  ?>

这是一个名为locations.php的函数：

function deleteLoc($loc_id){
    global $conn;

            try{
                $stmt = $conn->prepare('DELETE FROM address WHERE id=:id');
                $stmt->bindParam(':id',$loc_id);                
                $stmt->execute();
                $row[] = 'deleted';
                return $row;                
            }
            catch(PDOException $e){
                if(DEBUG === true){
                    header('Location:../../error/db_error.php?err_msg='.$e->getMessage());
                }
                else{
                    header('Location:../../error/db_error.php?err_msg');
                }
        }   
}

Answer 1

如果你正确地获得了loc_id 的值。我认为下面的代码会对你有很大帮助。让我们试试..

JavaScript

<script type="text/javascript">
     $(document).ready(function() {
      $('#del_loc').bind('click',function(e){
      e.preventDefault();
        var id = $('#loc_id').val();

        var data = 'loc_id='+id;
     //try here alert(id); For checking whether you are getting value or not
     $.ajax({
       type: "POST",
       url: "include/locations/delete.php",
       dataType:'JSON',
       data: data,
       success: function(result){
        var res=eval(result);
        if(res.success){
          window.location.replace("address.php?id=");
               }
       else
       {
       if(res.nAddress){
        $('.panel-footer').append('<span class="help-block"  style="float:right;"><strong>'+err_msg.nAddress+'</strong></span>');
        }
      }
    }
   });
  });
});
</script>

PHPdelete.php

<?php

     require '../../config/init.php';
     require '../functions/locations.php';
     require '../services/xss.php';

     $loc_id = _e($_POST['loc_id']);

     $data = deleteLoc($loc_id);

       if(is_array($data)){
        echo json_encode(array('success'=>true));
       }
       else{
          echo json_encode($data);
       }
  ?>