<?php/** * filename: ext_page.class.php * @package:phpbean * @author :feifengxlq<feifengxlq#gmail.com><[url=http://www.phpobject.net/]http://www.phpobject.net/[/url]> * @copyright :Copyright 2006 feifengxlq * @license:version 2.0 * @create:2006-5-31 * @modify:2006-6-1 * @modify:feifengxlq 2006-11-4 * 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, * to see detail,please visit [url=http://www.phpobject.net/blog/read.php]http://www.phpobject.net/blog/read.php[/url]? * example: * 模式四种分页模式： require_once('../libs/classes/page.class.php'); $page=new page(array('total'=>1000,'perpage'=>20)); echo 'mode:1<br>'.$page->show(); echo '<hr>mode:2<br>'.$page->show(2); echo '<hr>mode:3<br>'.$page->show(3); echo '<hr>mode:4<br>'.$page->show(4); 开启AJAX： $ajaxpage=new page(array('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test')); echo 'mode:1<br>'.$ajaxpage->show(); 采用继承自定义分页显示模式： demo:[url=http://www.phpobject.net/blog]http://www.phpobject.net/blog[/url] */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,$style); } return '<span class="'.$style.'">'.$this->next_page.'</span>'; } /** * 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,$style); } return '<span class="'.$style.'">'.$this->pre_page.'</span>'; } /** * 获取显示“首页”的代码 * * @return string */ function first_page($style='') { if($this->nowindex==1){ return '<span class="'.$style.'">'.$this->first_page.'</span>'; } 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==$this->totalpage){ return '<span class="'.$style.'">'.$this->last_page.'</span>'; } 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('<span class="'.$nowindex_style.'">'.$i.'</span>'); }else{ break; } $return.="\n"; } unset($begin); return $return; } /** * 获取显示跳转按钮的代码 * * @return string */ function select() { $return='<select name="PB_Page_Select" onchange="PageSelect()">'; for($i=1;$i<=$this->totalpage;$i++) { if($i==$this->nowindex){ $return.='<option value="'.$i.'" selected>'.$i.'</option>'; }else{ $return.='<option value="'.$i.'">'.$i.'</option>'; } } unset($i); $return.='</select>'; 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('<a href="">1</a>')将返回[<a href="">1</a>] * * @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 '<a '.$style.' href="javascrīpt:'.$this->ajax_action_name.'(\''.$url.'\')">'.$text.'</a>'; }else{ return '<a '.$style.' href="'.$url.'">'.$text.'</a>'; } } /** * 出错处理方式 */ function error($function,$errormsg) { die('Error in file <b>'.__FILE__.'</b> ,Function <b>'.$function.'()</b> :'.$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); }}?>
