- /** 
 -  * filename: ext_page.class.php 
 -  * @package:phpbean 
 -  * descrīption:超强分页类,四种分页模式,默认采用类似baidu,google的分页风格。 
 -  * 2.0增加功能:支持自定义风格,自定义样式,同时支持PHP4和PHP5, 
 -  * example: 
 -  * 模式四种分页模式: 
 -    require_once('../libs/classes/page.class.php'); 
 -    $page=new page(array('total'=>1000,'perpage'=>20)); 
 -    echo 'mode:1
 '.$page->show();  -    echo '
 mode:2 '.$page->show(2);  -    echo '
 mode:3 '.$page->show(3);  -    echo '
 mode:4 '.$page->show(4);  -    开启AJAX: 
 -    $ajaxpage=new page(array('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test')); 
 -    echo 'mode:1
 '.$ajaxpage->show();  -    采用继承自定义分页显示模式。
 -    编辑整理:脚本学堂 http://bbs.it-home.org
 -  */  
 - class _page  
 - {  
 -  /** 
 -   * config ,public 
 -   */  
 -  var $page_name="PB_page";//page标签,用来控制url页。比如说xxx.php?PB_page=2中的PB_page  
 -  var $next_page='>';//下一页  
 -  var $pre_page='<';//上一页  
 -  var $first_page='First';//首页  
 -  var $last_page='Last';//尾页  
 -  var $pre_bar='<<';//上一分页条  
 -  var $next_bar='>>';//下一分页条  
 -  var $format_left='[';  
 -  var $format_right=']';  
 -  var $is_ajax=false;//是否支持AJAX分页模式  
 -    
 -  /** 
 -   * private 
 -   * 
 -   */  
 -  var $pagebarnum=10;//控制记录条的个数。  
 -  var $totalpage=0;//总页数  
 -  var $ajax_action_name='';//AJAX动作名  
 -  var $nowindex=1;//当前页  
 -  var $url="";//url地址头  
 -  var $offset=0;  
 -    
 -  /** 
 -   * constructor构造函数 
 -   * 
 -   * @param array $array['total'],$array['perpage'],$array['nowindex'],$array['url'],$array['ajax']... 
 -   */  
 -  function page($array)  
 -  {  
 -   if(is_array($array)){  
 -      if(!array_key_exists('total',$array))$this->error(__FUNCTION__,'need a param of total');  
 -      $total=intval($array['total']);  
 -      $perpage=(array_key_exists('perpage',$array))?intval($array['perpage']):10;  
 -      $nowindex=(array_key_exists('nowindex',$array))?intval($array['nowindex']):'';  
 -      $url=(array_key_exists('url',$array))?$array['url']:'';  
 -   }else{  
 -      $total=$array;  
 -      $perpage=10;  
 -      $nowindex='';  
 -      $url='';  
 -   }  
 -   if((!is_int($total))||($total<0))$this->error(__FUNCTION__,$total.' is not a positive integer!');  
 -   if((!is_int($perpage))||($perpage<=0))$this->error(__FUNCTION__,$perpage.' is not a positive integer!');  
 -   if(!empty($array['page_name']))$this->set('page_name',$array['page_name']);//设置pagename  
 -   $this->_set_nowindex($nowindex);//设置当前页  
 -   $this->_set_url($url);//设置链接地址  
 -   $this->totalpage=ceil($total/$perpage);  
 -   $this->offset=($this->nowindex-1)*$perpage;  
 -   if(!empty($array['ajax']))$this->open_ajax($array['ajax']);//打开AJAX模式  
 -  }  
 -  /** 
 -   * 设定类中指定变量名的值,如果改变量不属于这个类,将throw一个exception 
 -   * 
 -   * @param string $var 
 -   * @param string $value 
 -   */  
 -  function set($var,$value)  
 -  {  
 -   if(in_array($var,get_object_vars($this)))  
 -      $this->$var=$value;  
 -   else {  
 -    $this->error(__FUNCTION__,$var." does not belong to PB_Page!");  
 -   }  
 -    
 -  }  
 -  /** 
 -   * 打开倒AJAX模式 
 -   * 
 -   * @param string $action 默认ajax触发的动作。 
 -   */  
 -  function open_ajax($action)  
 -  {  
 -   $this->is_ajax=true;  
 -   $this->ajax_action_name=$action;  
 -  }  
 -  /** 
 -   * 获取显示"下一页"的代码 
 -   * 
 -   * @param string $style 
 -   * @return string 
 -   */  
 -  function next_page($style='')  
 -  {  
 -   if($this->nowindex<$this->totalpage){  
 -    return $this->_get_link($this->_get_url($this->nowindex+1),$this->next_page,$style);  
 -   }  
 -   return ''.$this->next_page.'';  
 -  }  
 -    
 -  /** 
 -   * 获取显示“上一页”的代码 
 -   * 
 -   * @param string $style 
 -   * @return string 
 -   */  
 -  function pre_page($style='')  
 -  {  
 -   if($this->nowindex>1){  
 -    return $this->_get_link($this->_get_url($this->nowindex-1),$this->pre_page,$style);  
 -   }  
 -   return ''.$this->pre_page.'';  
 -  }  
 -    
 -  /** 
 -   * 获取显示“首页”的代码 
 -   * 
 -   * @return string 
 -   */  
 -  function first_page($style='')  
 -  {  
 -   if($this->nowindex==1){  
 -       return ''.$this->first_page.'';  
 -   }  
 -   return $this->_get_link($this->_get_url(1),$this->first_page,$style);  
 -  }  
 -    
 -  /** 
 -   * 获取显示“尾页”的代码 
 -   * 
 -   * @return string 
 -   */  
 -  function last_page($style='')  
 -  {  
 -   if($this->nowindex==$this->totalpage){  
 -       return ''.$this->last_page.'';  
 -   }  
 -   return $this->_get_link($this->_get_url($this->totalpage),$this->last_page,$style);  
 -  }  
 -    
 -  function nowbar($style='',$nowindex_style='')  
 -  {  
 -   $plus=ceil($this->pagebarnum/2);  
 -   if($this->pagebarnum-$plus+$this->nowindex>$this->totalpage)$plus=($this->pagebarnum-$this->totalpage+$this->nowindex);  
 -   $begin=$this->nowindex-$plus+1;  
 -   $begin=($begin>=1)?$begin:1;  
 -   $return='';  
 -   for($i=$begin;$i<$begin+$this->pagebarnum;$i++)  
 -   {  
 -    if($i<=$this->totalpage){  
 -     if($i!=$this->nowindex)  
 -         $return.=$this->_get_text($this->_get_link($this->_get_url($i),$i,$style));  
 -     else  
 -         $return.=$this->_get_text(''.$i.'');  
 -    }else{  
 -     break;  
 -    }  
 -    $return.="\n";  
 -   }  
 -   unset($begin);  
 -   return $return;  
 -  }  
 -  /** 
 -   * 获取显示跳转按钮的代码 
 -   * 
 -   * @return string 
 -   */  
 -  function select()  
 -  {  
 -    $return='';  
 -   return $return;  
 -  }  
 -    
 -  /** 
 -   * 获取mysql 语句中limit需要的值 
 -   * 
 -   * @return string 
 -   */  
 -  function offset()  
 -  {  
 -   return $this->offset;  
 -  }  
 -    
 -  /** 
 -   * 控制分页显示风格(你可以增加相应的风格) 
 -   * 
 -   * @param int $mode 
 -   * @return string 
 -   */  
 -  function show($mode=1)  
 -  {  
 -   switch ($mode)  
 -   {  
 -    case '1':  
 -     $this->next_page='下一页';  
 -     $this->pre_page='上一页';  
 -     return $this->pre_page().$this->nowbar().$this->next_page().'第'.$this->select().'页';  
 -     break;  
 -    case '2':  
 -     $this->next_page='下一页';  
 -     $this->pre_page='上一页';  
 -     $this->first_page='首页';  
 -     $this->last_page='尾页';  
 -     return $this->first_page().$this->pre_page().'[第'.$this->nowindex.'页]'.$this->next_page().$this->last_page().'第'.$this->select().'页';  
 -     break;  
 -    case '3':  
 -     $this->next_page='下一页';  
 -     $this->pre_page='上一页';  
 -     $this->first_page='首页';  
 -     $this->last_page='尾页';  
 -     return $this->first_page().$this->pre_page().$this->next_page().$this->last_page();  
 -     break;  
 -    case '4':  
 -     $this->next_page='下一页';  
 -     $this->pre_page='上一页';  
 -     return $this->pre_page().$this->nowbar().$this->next_page();  
 -     break;  
 -    case '5':  
 -     return $this->pre_bar().$this->pre_page().$this->nowbar().$this->next_page().$this->next_bar();  
 -     break;  
 -    case '6':  
 -     return $this->select();  
 -     break;  
 -    case '7':  
 -     return $this->nowbar();  
 -     break;  
 -   }  
 -    
 -  }  
 - /*----------------private function (私有方法)-----------------------------------------------------------*/  
 -  /** 
 -   * 设置url头地址 
 -   * @param: String $url 
 -   * @return boolean 
 -   */  
 -  function _set_url($url="")  
 -  {  
 -   if(!empty($url)){  
 -       //手动设置  
 -    $this->url=$url.((stristr($url,'?'))?'&':'?').$this->page_name."=";  
 -   }else{  
 -       //自动获取  
 -    if(empty($_SERVER['QUERY_STRING'])){  
 -        //不存在QUERY_STRING时  
 -     $this->url=$_SERVER['REQUEST_URI']."?".$this->page_name."=";  
 -    }else{  
 -        //  
 -     if(stristr($_SERVER['QUERY_STRING'],$this->page_name.'=')){  
 -         //地址存在页面参数  
 -      $this->url=str_replace($this->page_name.'='.$this->nowindex,'',$_SERVER['REQUEST_URI']);  
 -      $last=$this->url[strlen($this->url)-1];  
 -      if($last=='?'||$last=='&'){  
 -          $this->url.=$this->page_name."=";  
 -      }else{  
 -          $this->url.='&'.$this->page_name."=";  
 -      }  
 -     }else{  
 -         //  
 -      $this->url=$_SERVER['REQUEST_URI'].'&'.$this->page_name.'=';  
 -     }//end if      
 -    }//end if  
 -   }//end if  
 -  }  
 -    
 -  /** 
 -   * 设置当前页面 
 -   * 
 -   */  
 -  function _set_nowindex($nowindex)  
 -  {  
 -   if(empty($nowindex)){  
 -    //系统获取  
 -      
 -    if(isset($_GET[$this->page_name])){  
 -     $this->nowindex=intval($_GET[$this->page_name]);  
 -    }  
 -    if(isset($_POST['PB_Page_Select'])){  
 -         $this->nowindex=$_POST['PB_Page_Select'];  
 -      }  
 -   }else{  
 -       //手动设置  
 -    $this->nowindex=intval($nowindex);  
 -   }  
 -  }  
 -    
 -  /** 
 -   * 为指定的页面返回地址值 
 -   * 
 -   * @param int $pageno 
 -   * @return string $url 
 -   */  
 -  function _get_url($pageno=1)  
 -  {  
 -   return $this->url.$pageno;  
 -  }  
 -    
 -  /** 
 -   * 获取分页显示文字,比如说默认情况下_get_text('1')将返回[1] 
 -   * 
 -   * @param String $str 
 -   * @return string $url 
 -   */  
 -  function _get_text($str)  
 -  {  
 -   return $this->format_left.$str.$this->format_right;  
 -  }  
 -    
 -  /** 
 -    * 获取链接地址 
 -  */  
 -  function _get_link($url,$text,$style=''){  
 -   $style=(empty($style))?'':'class="'.$style.'"';  
 -   if($this->is_ajax){  
 -       //如果是使用AJAX模式  
 -    return 'ajax_action_name.'(\''.$url.'\')">'.$text.'';  
 -   }else{  
 -    return ''.$text.'';  
 -   }  
 -  }  
 -  /** 
 -    * 出错处理方式 
 -  */  
 -  function error($function,$errormsg)  
 -  {  
 -      die('Error in file '.__FILE__.' ,Function '.$function.'() :'.$errormsg);  
 -  }  
 - }  
 -   
 - // 继承分页类,加入数据库访问能力.  
 - class Page extends _Page {  
 -     var $db; //db connected object  
 -     var $_Sql_Query = ''; //查询数据库的sql  
 -     var $_Total = 0; //查询到的总记录.必须先是  
 -     var $_Rst = array(); //查询到的记录.  
 -     /** 
 -      * 分页查询类库. 
 -      * 
 -      * @param String $Sql 记录查询的SQL 语句. 
 -      * @param int $pagenuber 每页多少条记录. 
 -      * @param int $pagen 当前页面. 
 -      * @param String $url 分页链接带入的参数. index.php?xx=b&bb=33 
 -      * @param String $pname 当前第几页的标记,默认是 index.php?xx=b&bb=33&page=2 如果有特殊要求 
 - 可以修改 $pname的参数. 比如: $pname='db_page',则变成: index.php?xx=b&bb=33&db_page=2 
 -      * @return Mysql_Page 
 -      */  
 -   
 -     function Page($db, $sql_query = '', $max_rows_per_page = 20, $current_page_number = 0, $url = '', $parameters = '', $pname = 'PB_page',$otc = '*') {  
 -         $this -> db = $db;  
 -         $pos_to = strlen($sql_query);  
 -         $pos_from = strpos($sql_query, ' from', 0);  
 -         $pos_group_by = strpos($sql_query, ' group by', $pos_from);  
 -         if (($pos_group_by < $pos_to) && ($pos_group_by != false)) $pos_to = $pos_group_by;  
 -         $pos_having = strpos($sql_query, ' having', $pos_from);  
 -         if (($pos_having < $pos_to) && ($pos_having != false)) $pos_to = $pos_having;  
 -         $pos_order_by = strpos($sql_query, ' order by', $pos_from);  
 -         if (($pos_order_by < $pos_to) && ($pos_order_by != false)) $pos_to = $pos_order_by;  
 -         $reviews_count = $this -> db -> getResults("select count($otc) as total " . substr($sql_query, $pos_from, ($pos_to - $pos_from)));  
 -         $query_num_rows = $reviews_count[0]['total'];  
 -         $this -> _Total = $query_num_rows;  
 -         $num_pages = ceil($query_num_rows / $max_rows_per_page);  
 -         if ($current_page_number > $num_pages) {  
 -             $current_page_number = $num_pages;  
 -         }  
 -         $offset = ($max_rows_per_page * ($current_page_number - 1));  
 -         if ($offset < 0) $offset = 0;  
 -         if ($offset > 0) {  
 -             $offset = $offset + 1;  
 -         }  
 -         $this -> _Sql_Query = $sql_query . " limit " . $offset . ", " . $max_rows_per_page;  
 -         $this -> setData(); //查询数据库.  
 -         parent :: page(array('total' => $query_num_rows, 'perpage' => $max_rows_per_page, 'page_name' => $pname, 'url' => $url, 'parameters' => $parameters));  
 -     }  
 -   
 -     /** 
 -      * 取得当前页面的记录,返回一个数组. 
 -      */  
 -     function findByAll() {  
 -         return $this -> _Rst;  
 -     }  
 -     /** 
 -      * 显示分页信息. 
 -      * 
 -      * @param int $model 
 -      */  
 -     function dispaly_links($model) {  
 -         $this -> show($model);  
 -     }  
 -     /** 
 -      * 返回记录数. 
 -      * 
 -      * @return Int 
 -      */  
 -     function getCount() {  
 -         return $this -> _Total;  
 -     }  
 -     /** 
 -      * 取查询结果记录数.. 
 -      * 
 -      * @return Int 
 -      */  
 -     function getRows() {  
 -         return count($this -> _Rst);  
 -     }  
 -     /** 
 -      * 执行查询功能. 
 -      * 计算数组. 
 -      * 私有方法. 
 -      */  
 -     function setData() {  
 -         $this -> _Rst = $this -> db -> getResults($this -> _Sql_Query);  
 -     }  
 - }  
 -   
 - ?> 
 
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