<?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 <[email protected]>
*/
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();
*/
?>