帮助修复分页类

Question

这里是我的分页类。构造中的数据只是另一个可以执行db查询和其他事情的类。我遇到的问题是，我似乎无法得到数据输出匹配分页打印，我似乎无法得到mysql_fetch_assoc（）查询数据并打印出来。我得到这个错误：

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /phpdev/pagination/index.php on line 215 

我知道这可能意味着该查询心不是正确的为它获取的数据，但我已经正确输入。很抱歉脚本有点长。我提前感谢所有帮助。

<?php 
include_once("class.db.php"); 
mysql_connect("host","login","password"); 
mysql_select_db("iadcart"); 

class Pagination { 

     var $adjacents; 
     var $limit; 
     var $param; 
     var $mPage; 
     var $query; 
     var $qData; 
     var $printData; 
     protected $db; 


     function __construct() { 
      $this->db = new MysqlDB; 
     } 


     function show() { 
      $result = $this->db->query($this->query); 
      $totalPages = $this->db->num_rows($result); 
      $limit = $this->limit; 

      /* ------------------------------------- 
       Set Page 
       ------------------------------------- */ 

      if(isset($_GET['page'])) { 
       $page = intval($_GET['page']); 
       $start = ($page - 1) * $limit; 
      } else { 
       $start = 0; 
      } 



      /* ------------------------------------- 
       Set Page Vars 
       ------------------------------------- */ 

      if($page == 0) { 
       $page = 1; 
      } 

      $prev = $page - 1; 
      $next = $page + 1; 
      $lastPage = ceil($totalPages/$limit); 
      $lpm1 = $lastPage - 1; 
      $adjacents = $this->adjacents; 
      $mPage = $this->mPage; 

      //the magic 
      $this->qData = $this->query . " LIMIT $start, $limit"; 
      $this->printData = $this->db->query($this->qData); 

      /* ------------------------------------- 
       Draw Pagination Object 
       ------------------------------------- */ 

      $pagination = ""; 
      if($lastPage > 1) { 
       $pagination .= "<div class='pagination'>"; 
      } 


      /* ------------------------------------- 
       Previous Link 
       ------------------------------------- */ 

     if($page > 1) { 
      $pagination .= "<li><a href='$mPage?page=$prev'> previous </a></li>"; 
     } else { 
      $pagination .= "<li class='previous-off'> previous </li>"; 
     } 


     /* ------------------------------------- 
      Page Numbers (not enough pages - just display active page) 
      ------------------------------------- */ 

      if($lastPage < 7 + ($adjacents * 2)) { 
       for($counter = 1; $counter <= $lastPage; $counter++) { 
        if($counter == $page) { 
         $pagination .= "<li class='active'>$counter</li>"; 
        } else { 
         $pagination .= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; 
        } 
       } 


      } 


     /* ------------------------------------- 
       Page Numbers (enough pages to paginate) 
      ------------------------------------- */ 

     elseif($lastPage > 5 + ($adjacents * 2)) { 
      //close to beginning; only hide later pages 
      if($page < 1 + ($adjacents * 2)) { 
       for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++) { 
        if ($counter == $page) { 
         $pagination.= "<li class='active'>$counter</li>"; 
        } 
        else { 
         $pagination.= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; 
        }    
       } 
       $pagination.= "..."; 
       $pagination.= "<li><a href='$mPage?page=$lpm1'>$lpm1</a></li>"; 
       $pagination.= "<li><a href='$mPage?page=$lastPage'>$lastPage</a></li>";  
      } 




      elseif($lastPage - ($adjacents * 2) > $page && $page > ($adjacents * 2)) { 
       $pagination.= "<li><a href='$mPage?page=1'>1</a></li>"; 
       $pagination.= "<li><a href='$mPage?page=2'>2</a></li>"; 
       $pagination.= "..."; 
       for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++) { 
        if ($counter == $page) { 
         $pagination.= "<li class='active'>$counter</li>"; 
        } 
        else { 
         $pagination.= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; 
        }    
       } 
       $pagination.= "..."; 
       $pagination.= "<li><a href='$mPage?page=$lpm1'>$lpm1</a></li>"; 
       $pagination.= "<li><a href='$mPage?page=$lastPage'>$lastPage</a></li>";  
      } 



      else { 
       $pagination.= "<li><a href='$mPage?page=1'>1</a></li>"; 
       $pagination.= "</li><a href='$mPage?page=2'>2</a></li>"; 
       $pagination.= "..."; 
       for ($counter = $lastPage - (2 + ($adjacents * 2)); $counter <= $lastPage; $counter++) { 

         if ($counter == $page) { 
          $pagination.= "<li class='active'>$counter</li>"; 
         } 
         else { 
          $pagination.= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; 
         } 

        } 
       } 
      } 



      /* ------------------------------------- 
       Next Link 
       ------------------------------------- */ 
      if ($page < $counter - 1) { 
       $pagination.= "<li><a href='$mPage?page=$next'> Next </a></li>"; 
      } 
      else { 
       $pagination.= "<li class='next-off'> Next </li>"; 
      $pagination.= "</div>"; 
      } 

      print $pagination; 
     } 






     } 


?>   
<html> 
<head> 
</head> 
<body> 

    <table style="width:800px;"> 

    <?php 


    mysql_connect("localhost","root","games818"); 
    mysql_select_db("iadcart"); 

    $pagination = new pagination; 
    $pagination->adjacents = 3; 
    $pagination->limit = 10; 
    $pagination->param = $_GET['page']; 
    $pagination->mPage = "index.php"; 
    $pagination->query = "select * from tbl_products where pVisible = 'yes'"; 


    while($row = mysql_fetch_assoc($pagination->printData)) { 
     print $row['pName']; 
    } 




    ?> 

    </table> 

    <br/><br/> 

    <?php $pagination->show(); ?> 






</body> 
</html> 

Answer 1

你的变量$pagination->printData获取的show()功能设置，但你调用该函数后您while循环，所以没有查询结果$pagination->printData然而，当你在你的while循环使用。