采用url传递参数的方式，可能会有一定的影响或者叫已知的bug，这次做了一些扩展，同时兼容了以前的模式

原来发表过一个脱离数据库的分页类，最近使用的时候发现有些时候搜索的东西过于大的时候，采用url传递参数的方式，可能会有一定的影响或者叫已知的bug，这次做了一些扩展，同时兼容了以前的模式，使用上面很简单的，只需要多设置一个参数就可以了代码如下：

<?php 
/** 
* 功能: 分页类，根据提供的数据总量和页面大小 
* 创建日期:Fri Apr 20 16:45:21 CST 2007 
* 最后更新: 
* 作者: sanshi <sanshi0815@tom.com> 
*/ 

class pagination 
{ 
    var $result = array(); 
    var $pVar = "myp";//page参数分页记数 
    var $urlParamStr = ""; //页面的所有参数 
    var $sqlMoveNumber = 0; //数据的偏移量 
    var $is_post = false; 

    public function pagination() 
    { 

    } 
    public function set($sum,$pageSize,$page="",$is_post = false) 
    { 
        $this->is_post = $is_post; 
        $this->pVar = defined('PAGE_BAR') ? PAGE_BAR : 'myp' ; 
        $url = $_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']; 
        //计算出总页数 
        $curPage = $this->getCurPage(); 

        $temp['sumPage'] = ceil($sum/$pageSize); 
        //修改了,页码超出的bug 
        if($curPage>$temp['sumPage']) $curPage=$temp['sumPage']; 
        $temp['curPage'] = $curPage; 
        $temp['nextPage'] = $temp['sumPage'] > $curPage ? ($curPage+1) : $temp['sumPage']; 
        $temp['upPage'] = $curPage >1 ? $curPage-1 :1; 
        $temp['endPage'] = $temp['sumPage']; 
        $this->urlParamStr = $this->_makeUrl($url); 
        $temp['urlPageStr'] = ($page=="") ? $this->_makeUrl($url) : $page.$this->urlParamStr; 

        $this->sqlMoveNumber = $curPage <2 ? 0 : ($curPage-1)*$pageSize; 
        $temp['sqlMoveNumber'] = $this->sqlMoveNumber; 
        $temp['rowNo'] = $sum; 
        $this->result = $temp; 
        return $this->result; 
        //print_r($temp);exit(); 
    } 
    public function getSqlMove() 
    { 
        return $this->sqlMoveNumber; 
    } 
    public function getFooter() 
    { 
        $str= "共有 <FONT COLOR=#FF0033>{$this->result['rowNo']}</FONT> 条 <a href='{$this->result['urlPageStr']}{$this->result['upPage']}'"; 
        if($this->is_post) $str .=" onclick='return sanshi_page_post(this.href,{$this->result['upPage']});' "; 
        $str .=" >上一页</a> "; 
        $str .=" 当前 {$this->result['curPage']} 页"; 
        $str .=" 共有 {$this->result['sumPage']} 页"; 
        $str .=" <a href='{$this->result['urlPageStr']}{$this->result['nextPage']}'"; 
        if($this->is_post) $str .=" onclick='return sanshi_page_post(this.href,{$this->result['nextPage']});' "; 
        $str .=" >下一页</a>"; 
        return $str; 
    } 
    public function getJumpPage() 
    { 
        if($this->is_post) 
        { 
            $str = " 跳到第 <select name='topage' size='1' onchange='sanshi_page_post(\"{$this->result['urlPageStr']}\"+this.value,this.value)'>\n"; 
        }else{ 
            $str = " 跳到第 <select name='topage' size='1' onchange='window.location=\"{$this->result['urlPageStr']}\"+this.value'>\n"; 
        } 
for($i=1;$i<=$this->result['sumPage'];$i++) 
{ 
$str .= ($i==$this->result['curPage']) ? "<option value='$i' selected>$i</option>\n" : "<option value='$i'>$i</option>\n"; 
} 
$str.="</select> 页"; 
         //输出form表单 
        if($this->is_post) 
        { 
            $str .="<script type="text/javascript"><!-- 
            function sanshi_page_post(jump_link,page_no) 
            { 
                document.getElementById('sanshi_goPage').action = jump_link; document.getElementById('{$this->pVar}').value = page_no; 
                document.getElementById('sanshi_goPage').submit(); 
                return false; 
            } 

// --></script>"; 
            $str .="<form name='sanshi_goPage' id='sanshi_goPage' method=post>"; 
            $str .="<input type=\"hidden\" name='{$this->pVar}' id='{$this->pVar}' value=0>"; 
            $_POST = isset($_POST) ? $_POST : array(); 
            foreach($_POST AS $k=>$v) 
            { 
                $str .="<input type=\"hidden\" name=\"{$k}\" id=\"{$k}\" value=\"{$v}\">"; 
            } 
            $str .="</form>"; 
        } 
return $str; 
    } 
    public function getCurPage() 
    { 
        return isset($_GET[$this->pVar]) ? intval($_GET[$this->pVar]) : 1 ; 
    } 
    //分析出url的参数返回？后的参数，页码为空 包括问号 
    private function _makeUrl($url) 
    { 
        $arrayUrl=parse_url($url); 
        if(isset($arrayUrl['query'])) 
        { 
            $q=$arrayUrl['query']; 
            parse_str($q,$qParam); 
            //print_r($qParam); 
            if(array_key_exists($this->pVar,$qParam)) 
            { 
                foreach ($qParam AS $k=>$v) 
                { 
                    if($k !=$this->pVar) $temp[$k] = $v; 
                } 
                $temp[$this->pVar] = ""; 
                if(function_exists("http_build_query")) 
                    return '?'.http_build_query($temp); 
                else 
                    return '?'.sanshi_http_build_query($temp); 
            }else { 
                return "?{$q}&{$this->pVar}="; 
            } 
        }else{ 
            return "?{$this->pVar}="; 
        } 

    } 
} 
function sanshi_http_build_query($a,$b='',$c=0) 
{ 
    if (!is_array($a)) return false; 
    foreach ((array)$a as $k=>$v) 
    { 
        if ($c) 
            $k=$b."[".$k."]"; 
        elseif (is_int($k)) 
            $k=$b.$k; 
        if (is_array($v)||is_object($v)) 
        { 
            $r[]=http_build_query($v,$k,1); 
            continue; 
        } 
        $r[]=$k."=".urlencode($v); 
    } 
    return implode("&",$r); 
} 
/* 
//print_r($_SERVER); 
$p = new pagination(); 
$p->set(10,2,'thi.php'); 
echo $p->getFooter(); 
echo $p->getJumpPage(); 
*/ 
?>