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发表于 2009-9-26 22:28:28
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发一个修改版的,page类,适应/calss/fangfa/page/3的路径,
PHP复制代码 <?php
/**
* filename: ext_page.class.php
* @package:phpbean
* @author :feifengxlq<feifengxlq#gmail.com>
* @copyright :Copyright 2006 feifengxlq
* @license:version 2.0
* @create:2006-5-31
* @modify:2006-6-1
* @modify:feifengxlq 2006-11-4
* description: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 http://www.phpobject.net/blog/read.php
* 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:http://www.phpobject.net/blog
*/
class page
{
/**
* config ,public
*/
var $page_name="B_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;//每页显示记录个数。
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;
function __construct ()
{
}
/**
* constructor构造函数
*
* @param array $array['total'],$array['perpage'],$array['nowindex'],$array['url'],$array['ajax']...
*/
function pages ($array)
{ //dump($array);
if(is_array($array)){
$total=array_key_exists('total',$array)? intval($array['total']):$this->totalpage;
$perpage=(array_key_exists('perpage',$array))? intval($array['perpage']):$this->nowindex;
$nowindex=(array_key_exists('nowindex',$array))? intval($array['nowindex']):$this->pagebarnum;
$url=(array_key_exists('url',$array))? $array['url']:$this->url;
}else{
$this->error(__FUNCTION__,'pages方法缺少必要参数');
}
if((!is_int($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;
}
/**
* 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!");
}*/
{
if(array_key_exists($var,get_object_vars($this)))
$this->$var=$value; //此处的$this->$var为$this->page_name,在71行带入
else {
$this->error(__FUNCTION__,$var." does not belong to PB_Page!");
}
}
}
/**
* 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,$style);
}
if($this->mode == 3) $this->next_page='<img src="'.base_url ().'/images/page-next-disabled.gif" border="0">';
return '<span class="'.$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,$style);
}
if($this->mode == 3) $this->pre_page='<img src="'.base_url ().'/images/page-prev-disabled.gif" border="0">';
return '<span class="'.$style.'">'.$this->pre_page.'</span>';
}
/**
* 获取显示“首页”的代码
*
* @return string
*/
function first_page ($style='')
{
if($this->nowindex==1){
if($this->mode == 3) $this->first_page='<img src="'.base_url ().'/images/page-first-disabled.gif" border="0">';
return '<span class="'.$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==$this->totalpage ){
if($this->mode == 3) $this->last_page='<img src="'.base_url ().'/images/page-last-disabled.gif" border="0">';
return '<span class="'.$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 ()
{
$return=' <select name="B_Page_Select" onchange="ajax_page(\''.$this->url.'\'+this.value)">';
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)
{
$this->mode = $mode;
switch ($mode)
{
case '1'://上一页 1 2 3 4 5 6 7 8 下一页 数字板
return $this->first_page().$this->pre_page().$this->nowbar().$this->next_page().$this->last_page().' 第'.$this->select().'页 ';
break;
case '2'://首页 上一页 下一页 第5页 下一页 尾页 文字版
$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'://上一页 下一页 图片版
$this->next_page='<img src="'.base_url ().'/images/page-next.gif" border="0">';
$this->pre_page='<img src="'.base_url ().'/images/page-prev.gif" border="0">';
$this->first_page='<img src="'.base_url ().'/images/page-first.gif" border="0">';
$this->last_page='<img src="'.base_url ().'/images/page-last.gif" border="0">';
return $this->first_page().$this->pre_page().' 第'.$this->select().'页 '.$this->next_page().$this->last_page();
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)) //读取参数中的URL
{ //strrchr() 查找字符串在另一个字符串中最后一次出现的位置
$this->url=$url.((strrchr($url,'/'))? '':'/').$this->page_name."/";//末尾添加"/"
}else{
//自动获取URL
if(empty($_SERVER['QUERY_STRING']))//判断是否?page=2方式分页*QUERY_STRING获取url的?后的内容
{
$this->url=$_SERVER["REQUEST_URI"];//获取URL"/"和"/"之间的部分
if ($this->nowindex != 1 or (substr_count($this->url,'page')) != 0)//判断是否第一页 >1 不是第一页
{
$this->url= str_replace(''.$this->nowindex,'',$this->url);//替换URL中的页码,生成新URL
}else{//第一页的URL
if( strlen(strrchr($this->url,'/')) > 1 )
{
$this->url=$this->url."/index/".$this->page_name."/";
}else{
$this->url=$this->url."index/".$this->page_name."/";
}
}
}else{
if(stristr($_SERVER['QUERY_STRING'],$this->page_name.'='))//判断是否?page=2分页
{//以下if代码未修改,也未验证是否可用//未验证开始
$this->url=str_replace($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'].'&'.$this->page_name.'=';
}//end if //未验证结束
}//end if
}//end if
}
/**
* 设置当前页面
*
*/
function _set_nowindex ($nowindex)
{
if(isset($nowindex) and $nowindex != 0){
//系统获取
//$this->nowindex=intval($_GET[$this->page_name]);//用于&page=2这种url
if(is_int($nowindex))
{
$this->nowindex=intval($nowindex);//用于/page/2这种url
}else{
$this->error(__FUNCTION__,'nowindex参数为空');
}
}else{
//手动设置
$this->nowindex=1;
}
}
/**
* 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="'.$style.'"';
return '<a '.$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);
}
}
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