php 解决旧系统 查出所有数据分页的类

参考：

http://www.oschina.net/code/snippet_162279_5852

不同之处在于 没有实现分页的系统， 默认全部查出来 现在就要不能动后台的基础上进行操作 可以采用 相应的 如下 代码：

添加了几个自定义的  从mysql result 集合中 抽取指定片段的方法 ， 没有调用释放的原因 这个涉及到 程序的 原来校验

也多亏网上大神的帮助啊 。。。。 老系统害死人啊， 后台都不能动

<?php 
/* 分页类
 * @author  xiaojiong & 290747680@qq.com
 * @date 2011-08-17
 *
 * show(2)  1 ... 62 63 64 65 66 67 68 ... 150
 * 分页样式
 * #page{font:12px/16px arial}
 * #page span{float:left;margin:0px 3px;}
 * #page a{float:left;margin:0 3px;border:1px solid #ddd;padding:3px 7px; text-decoration:none;color:#666}
 * #page a.now_page,#page a:hover{color:#fff;background:#05c}
*/
class Core_Lib_Page
{
 public     $first_row;        //起始行数
 public     $list_rows;        //列表每页显示行数
 protected  $total_pages;      //总页数
 protected  $total_rows;       //总行数
 protected  $now_page;         //当前页数
 protected  $method  = 'defalut'; //处理情况 Ajax分页 Html分页(静态化时) 普通get方式
 protected  $parameter = '';
 protected  $page_name;        //分页参数的名称
 protected  $ajax_func_name;
 public     $plus = 3;         //分页偏移量
 protected  $url;

 public function get_page_result()
 {
     $lastResult = array();
     $skipCount = $this->get_skip_row_count();
    if(mysql_num_rows($result)>0)
    {
        mysql_data_seek($result,$skipCount);
    }
    $pageSize = $this->$list_rows;
    while($row = mysql_fetch_array($result))
    {
        $pageSize --;
        $lastResult[] = $row;
        
        if($pageSize == 0)
        {
            break ;
        }
    }
    return $lastResult;
 }
 
 public function get_skip_row_count()
 {
     return $this->list_rows*($this->now_page-1);
 }
 /**

  * 构造函数

  * @param unknown_type $data

  */
 public function __construct($data = array())
 {
     $this->total_rows = $data['total_rows'];

     $this->parameter         = !empty($data['parameter']) ? $data['parameter'] : '';

     $this->list_rows         = !empty($data['list_rows']) && $data['list_rows'] <= 100 ? $data['list_rows'] : 15;

     $this->total_pages       = ceil($this->total_rows / $this->list_rows);

     $this->page_name         = !empty($data['page_name']) ? $data['page_name'] : 'p';

     $this->ajax_func_name    = !empty($data['ajax_func_name']) ? $data['ajax_func_name'] : '';

     $this->method           = !empty($data['method']) ? $data['method'] : '';


     /* 当前页面 */

     if(!empty($data['now_page']))
     {

         $this->now_page = intval($data['now_page']);

     }else{

         $this->now_page   = !empty($_GET[$this->page_name]) ? intval($_GET[$this->page_name]):1;

     }

     $this->now_page   = $this->now_page <= 0 ? 1 : $this->now_page;

     if(!empty($this->total_pages) && $this->now_page > $this->total_pages)
     {

         $this->now_page = $this->total_pages;
     }

     $this->first_row = $this->list_rows * ($this->now_page - 1);
 }  

  

 /**

  * 得到当前连接

  * @param $page

  * @param $text

  * @return string

  */

 protected function _get_link($page,$text)
 {

     switch ($this->method) {

         case 'ajax':

             $parameter = '';

             if($this->parameter)

             {

                 $parameter = ','.$this->parameter;

             }

             return '<a onclick="' . $this->ajax_func_name . '(\'' . $page . '\''.$parameter.')" href="javascript:void(0)">' . $text . '</a>' . "\n";

         break;

          

         case 'html':

             $url = str_replace('?', $page,$this->parameter);

             return '<a href="' .$url . '">' . $text . '</a>' . "\n";

         break;

          

         default:

             return '<a href="' . $this->_get_url($page) . '">' . $text . '</a>' . "\n";

         break;

     }
 }

  

  

 /**

  * 设置当前页面链接

  */

 protected function _set_url()
 {

     $url  =  $_SERVER['REQUEST_URI'].(strpos($_SERVER['REQUEST_URI'],'?')?'':"?").$this->parameter;

     $parse = parse_url($url);

     if(isset($parse['query'])) {

         parse_str($parse['query'],$params);

         unset($params[$this->page_name]);

         $url   =  $parse['path'].'?'.http_build_query($params);

     }

     if(!empty($params))
     {

         $url .= '&';

     }

     $this->url = $url;

 }

  

 /**

  * 得到$page的url

  * @param $page 页面

  * @return string

  */

 protected function _get_url($page)
 {

     if($this->url === NULL)
     {

         $this->_set_url();  

     }

 //  $lable = strpos('&', $this->url) === FALSE ? '' : '&';

     return $this->url . $this->page_name . '=' . $page;
 }

  

  

 /**

  * 得到第一页

  * @return string

  */

 public function first_page($name = '第一页')
 {

     if($this->now_page > 5)

     {

         return $this->_get_link('1', $name);

     }  

     return '';

 }

  

 /**

  * 最后一页

  * @param $name

  * @return string

  */

 public function last_page($name = '最后一页')
 {

     if($this->now_page < $this->total_pages - 5)

     {

         return $this->_get_link($this->total_pages, $name);

     }  

     return '';

 } 

  

 /**

  * 上一页

  * @return string

  */

 public function up_page($name = '上一页')
 {

     if($this->now_page != 1)

     {

         return $this->_get_link($this->now_page - 1, $name);

     }

     return '';

 }

  

 /**

  * 下一页

  * @return string

  */

 public function down_page($name = '下一页')
 {

     if($this->now_page < $this->total_pages)

     {

         return $this->_get_link($this->now_page + 1, $name);

     }

     return '';

 }



 /**

  * 分页样式输出

  * @param $param

  * @return string

  */

 public function show($param = 1)
 {

     if($this->total_rows < 1)

     {

         return '';

     }

      

     $className = 'show_' . $param;

      

     $classNames = get_class_methods($this);



     if(in_array($className, $classNames))

     {

         return $this->$className();

     }

     return '';

 }

  

 protected function show_2()
 {

     if($this->total_pages != 1)

     {

         $return = '';

         $return .= $this->up_page('<');

         for($i = 1;$i<=$this->total_pages;$i++)

         {

             if($i == $this->now_page)

             {

                 $return .= "<a class='now_page'>$i</a>\n";

             }

             else

             {

                 if($this->now_page-$i>=4 && $i != 1)

                 {

                     $return .="<span class='pageMore'>...</span>\n";

                     $i = $this->now_page-3;

                 }

                 else

                 {

                     if($i >= $this->now_page+5 && $i != $this->total_pages)

                     {

                         $return .="<span>...</span>\n";

                         $i = $this->total_pages;

                     }

                     $return .= $this->_get_link($i, $i) . "\n";

                 }

             }

         }

         $return .= $this->down_page('>');

         return $return;

     }

 }

  

 protected function show_1()
 {

     $plus = $this->plus;

     if( $plus + $this->now_page > $this->total_pages)

     {

         $begin = $this->total_pages - $plus * 2;

     }else{

         $begin = $this->now_page - $plus;

     }

      

     $begin = ($begin >= 1) ? $begin : 1;

     $return = '';

     $return .= $this->first_page();

     $return .= $this->up_page();

     for ($i = $begin; $i <= $begin + $plus * 2;$i++)

     {

         if($i>$this->total_pages)

         {

             break;

         }

         if($i == $this->now_page)

         {

             $return .= "<a class='now_page'>$i</a>\n";

         }

         else

         {

             $return .= $this->_get_link($i, $i) . "\n";

         }

     }

     $return .= $this->down_page();

     $return .= $this->last_page();

     return $return;

 }

  

 protected function show_3()
 {

     $plus = $this->plus;

     if( $plus + $this->now_page > $this->total_pages)

     {

         $begin = $this->total_pages - $plus * 2;

     }else{

         $begin = $this->now_page - $plus;

     }      

     $begin = ($begin >= 1) ? $begin : 1;

     $return = '总计 ' .$this->total_rows. ' 个记录分为 ' .$this->total_pages. ' 页, 当前第 ' . $this->now_page . ' 页 ';

     $return .= ',每页 ';

     $return .= '<input type="text" value="'.$this->list_rows.'" id="pageSize" size="3"> ';

     $return .= $this->first_page()."\n";

     $return .= $this->up_page()."\n";

     $return .= $this->down_page()."\n";

     $return .= $this->last_page()."\n";

     $return .= '<select onchange="'.$this->ajax_func_name.'(this.value)" id="gotoPage">';

     

     for ($i = $begin;$i<=$begin+10;$i++)

     {

         if($i>$this->total_pages)

         {

             break;

         }          

         if($i == $this->now_page)

         {

             $return .= '<option selected="true" value="'.$i.'">'.$i.'</option>';

         }

         else

         {

             $return .= '<option value="' .$i. '">' .$i. '</option>';

         }          

     }

      $return .= '</select>';

     return $return;

 }

}
?>