标题：支持多风格的超强php分页类（转）
出处：沧海一粟
时间：Wed, 04 Jun 2008 23:53:03 +0000
作者：jed
地址：http://www.dzhope.com/post/442/

内容：
1、支持PHP4和PHP5
 2、增加了对ajax分页的功能
3、优化了整体结构等等。。。

 代码如下：



<? 
/** 
 * filename: ext_page.class.php 
 * @package:phpbean 
 * @author :feifengxlq<feifengxlq#gmail.com><http://www.phpobject.net/> 
 * @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="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)*$this->perpage; 
        if(!empty($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() 
    { 
        $return='<select name="PB_Page_Select" onchange="window.location.href=\''.$this->url.'\'+this.options[this.selectedIndex].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) 
    { 
        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; 
        } 
         
    } 
/*----------------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]); 
            } 
        }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 '.$style.' href="javascript:'.$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); 
    } 
} 
?> 







提供一个简单的演示demo

 PHP代码如下:



<?
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);
echo '<hr>开始AJAX模式:';
$ajaxpage=new page(array('total'=>1000,'perpage'=>20,'ajax'=>'ajax_page','page_name'=>'test'));
echo 'mode:1<br>'.$ajaxpage->show();
?> 




效果图见附件!


提供自定义风格的演示demo一个:

 PHP代码如下:



<style type="text/css">
<!--
.pagenavi { text-align:center;  font: 11px Arial, tahoma, sans-serif; padding-top: 20px; padding-bottom: 10px; margin: 0px; }
.pagenavi a {border: 1px solid #E2F1AF; background: #FFFFFF; text-decoration: none; color:#C16012; display:inline-block; padding-left:6px; padding-right:6px; padding-top:2px; padding-bottom:2px}
.pagenavi a:visited {border: 1px solid #E2F1AF; background: #FFFFFF; text-decoration: none; padding-left:6px; padding-right:6px; padding-top:2px; padding-bottom:2px}
.pagenavi .break {border: medium none;  text-decoration: none; color:#C16012; background:;; padding-left:6px; padding-right:6px; padding-top:2px; padding-bottom:2px}
.pagenavi .num {color:#C16012; font-size:12pt; padding-left:3px; padding-right:3px; padding-top:0; padding-bottom:0}
.pagenavi .curr {padding: 2px 6px; border-color: #999; font-weight: bold; font-size:12pt; background:transparent;}
.pagenavi a:hover {color: #C16012; background: #E2F1AF; text-decoration: none}
-->
</style>
<?
require_once('../libs/classes/page.class.php');
class mypage extends page
{
    function mypage($array)
 {
     parent::page($array);
  $this->first_page=1;
  $this->last_page=$this->totalpage;
  $this->set('format_left','');
  $this->set('format_right','');
 }
 
 function show()
 {
     $pagestr='<div class="pagenavi" id="lopage">页:';
  $pagestr.=$this->first_page().' ';
  $pagestr.=$this->nowbar('','curr');
  $pagestr.='<span class="break">...</span>';
  $pagestr.=$this->last_page();
  $pagestr.='   (总计<span class="num">'.$this->totalpage.'</span>页) </div>';
  $pagestr.='</div>';
  return $pagestr;
 }
}
$page=new mypage(array('total'=>1000,'perpage'=>20));
echo $page->show();
?> 




 

 




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