php 分页、全选、反选、全不选、批量删除(3)

                        <span class="list_width width_font">注册时间</span> 
                        <span class="list_width width_font">操  作</span> 
                    </li> 
                         <?php 
                          
                         if(isset($_POST['dell'])){       //批量删除  
                            $ids=$_POST['dell']; 
                            $ids=implode(",", $ids);   //implode函数 把数组元素组合为一个字符串。  
                            $sql="delete from user where id in ($ids)"; 
                            mysql_query($sql); 
                         } 
                          
                         if(isset($_GET['del'])){ 
                            $id=$_GET['del']; 
                            $sql="delete from user where id=".$id; 
                            mysql_query($sql);