php 分页类

爱在莫斯科

<?php
/*
*本程序文件对分页程序进行了封装
*
*/
class Page_Link
{
var $page_max = 10; //一组页码的最大数
var $page_num = 10; //总页数
var $length = 20; //一页的数据条数
var $isNextPage = true;
var $isFirstPage = false;
function Calculation_Page_Num( $total )
{
$this->page_num = ceil( $total / $this->length );
return $this->page_num;
}
function Calculation_Min_Max( $act_page = 1 )
{
// 定义左右偏移量
$py_left = 0;
$py_right = 0;
// 定义左右边界
$bj_left = 0;
$bj_right = 0;
// 定义滚动区间边界
$gd_left = 0;
$gd_right = 0;
// 判断是否需要分组
if ( ( $this->page_num - $this->page_max ) <= 0 )
{
// 不需要分组
$bj_left = 1;
$bj_right = $this->page_num;
}
else
{
// 要进行分组
// 判断容量的奇偶
$tmp = $this->page_max % 2;
if ( $tmp === 1 )
{
// 奇数
$py_left = $py_right = ( $this->page_max - 1 ) / 2;
}
else
{
// 偶数
$py_left = $this->page_max / 2 - 1;
$py_right = $this->page_max / 2;
}
// 计算滚动区间
$gd_left = 1 + $py_left;
$gd_right = $this->page_num - $py_right;
// 判断当前页是否落入了滚动区间
if ( $act_page >= $gd_left && $act_page <= $gd_right )
{
// 区间内
$bj_left = $act_page - $py_left;
$bj_right = $act_page + $py_right;
}
else
{
// 区间外
if ( ( $act_page - $py_left ) <= 1 )
{
// 左侧固定区间
$bj_left = 1;
$bj_right = $this->page_max;
}
else
{
$bj_left = $this->page_num - $this->page_max + 1;
$bj_right = $this->page_num;
}
}
}
$res = array();
$res['min'] = $bj_left;
$res['max'] = $bj_right;
return $res;

}
// 主方法
function make_page( $total, $act_page, $url, $param )
{
$page_num = $this->Calculation_Page_Num( $total );
$arr_min_max = $this->Calculation_Min_Max( $act_page );
if (!eregi("([?|&]$param=)", $url)) {
$url = strpos($url,"?")===false?$url."?":$url."&";
$url = $url."$param=0";
}
if ( $act_page > $page_num )
{
$act_page = $page_num;
}
// 用正则把url改成正规的
$url = eregi_replace( $param . '=[0-9]+', $param . '=0', $url );
$res = array();
$d = 0;
for( $i = $arr_min_max['min'];$i <= $arr_min_max['max'];$i++ )
{
if ( $i == $act_page )
{
$res[$d]['url'] = '';
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
else
{
$res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url );
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
$d++;
}
if ( $this->isNextPage )
{
$res = $this->make_before_next_link( $res, $act_page, $url, $param );
}
if ( $this->isFirstPage )
{
$res = $this->make_first_end_link( $res, $act_page, $url, $param );
}
return $res;
}
//// 带总页数
function make_page_with_total( $total, $act_page, $url, $param )
{
$page_num = $this->Calculation_Page_Num( $total );
$arr_min_max = $this->Calculation_Min_Max( $act_page );
if (!eregi("([?|&]$param=)", $url)) {
$url = strpos($url,"?")===false?$url."?":$url."&";
$url = $url."$param=0";
}
if ( $act_page > $page_num )
{
$act_page = $page_num;
}
// 用正则把url改成正规的
$url = eregi_replace( $param . '=[0-9]+', $param . '=0', $url );
$res = array();
$d = 0;
for( $i = $arr_min_max['min'];$i <= $arr_min_max['max'];$i++ )
{
if ( $i == $act_page )
{
$res[$d]['url'] = '';
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
else
{
$res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url );
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
$d++;
}
if ( $this->isNextPage )
{
$res = $this->make_before_next_link( $res, $act_page, $url, $param );
}
if ( $this->isFirstPage )
{
$res = $this->make_first_end_link( $res, $act_page, $url, $param );
}
$total_num= ceil($total/$this->length);
$result['total']=$total_num;
$result['DATA']=$res;
return $result;
}
// 附加上一页和下一页
function make_before_next_link( $arr, $act, $url, $param )
{
$tmp = array();
$before = $act - 1;
$next = $act + 1;
if ( $before < 1 )
{
$before = 1;
$tmp[0]['url'] = '';
$tmp[0]['name'] = "上一页";
$tmp[0]['no'] = $before;
}
else
{
$tmp[0]['url'] = str_replace( $param . '=0', $param . '=' . $before, $url );
$tmp[0]['name'] = "上一页";
$tmp[0]['no'] = $before;
}
$counts = sizeof( $arr );
$tmp_count = sizeof( $tmp );
for( $i = 0;$i < $counts;$i++ )
{
$tmp[$tmp_count]['url'] = $arr[$i]['url'];
$tmp[$tmp_count]['name'] = $arr[$i]['name'];
$tmp[$tmp_count]['no'] = $arr[$i]['no'];
$tmp_count++;
}
if ( $next > $this->page_num )
{
$next = $this->page_num;
$tmp[$tmp_count]['url'] = '';
$tmp[$tmp_count]['name'] = "下一页";
$tmp[$tmp_count]['no'] = $next;
}
else
{
$tmp[$tmp_count]['url'] = str_replace( $param . '=0', $param . '=' . $next, $url );
$tmp[$tmp_count]['name'] = "下一页";
$tmp[$tmp_count]['no'] = $next;
}
return $tmp;
}
// 附加首页和尾页
function make_first_end_link( $arr, $act, $url, $param )
{
$tmp = array();
$before = 1;
$next = $this->page_num;
if ( $act == 1 )
{
$before = 1;
$tmp[0]['url'] = '';
$tmp[0]['name'] = "首页";
$tmp[0]['no'] = $before;
}
else
{
$tmp[0]['url'] = str_replace( $param . '=0', $param . '=' . $before, $url );
$tmp[0]['name'] = "首页";
$tmp[0]['no'] = $before;
}
$counts = sizeof( $arr );
$tmp_count = sizeof( $tmp );
for( $i = 0;$i < $counts;$i++ )
{
$tmp[$tmp_count]['url'] = $arr[$i]['url'];
$tmp[$tmp_count]['name'] = $arr[$i]['name'];
$tmp[$tmp_count]['no'] = $arr[$i]['no'];
$tmp_count++;
}
if ( $act == $this->page_num )
{
$tmp[$tmp_count]['url'] = '';
$tmp[$tmp_count]['name'] = "尾页";
$tmp[$tmp_count]['no'] = $next;
}
else
{
$tmp[$tmp_count]['url'] = str_replace( $param . '=0', $param . '=' . $next, $url );
$tmp[$tmp_count]['name'] = "尾页";
$tmp[$tmp_count]['no'] = $next;
}
return $tmp;
}

/**
* 带上一页<，下一页>，省略号的分页
* @param int $total        记录总条数
* @param int $act_page        当前页码
* @param string $url        url
* @param int $maxpageicon    最大显示页码数
* @param int $style        上一页，下一页显示样式
* @param string $param        url参数
*/
function make_page_with_points( $total,$act_page,$url,$maxpageicon,$style,$param )
{
$page_num = $this->Calculation_Page_Num( $total );        //总页数
$arr_min_max = $this->Calculation_Min_Max( $act_page );        //最大页，最小页   
if($total==0)
{
return "";
}
if( $act_page > $page_num )
{
$act_page = $page_num+1;
$page_num = $page_num+1;
}
switch ($style){
case 1:
$name_before = '前一页';
$name_next = '后一页';
break;
case 2:
$name_before = '<';
$name_next = '>';
break;
case 3:
$name_before = '<<';
$name_next = '>>';
break;
default:
$name_before = '上一页';
$name_next = '下一页';
}
if (!eregi("([?|&]$param=)", $url)) {
$url = strpos($url,"?")===false?$url."?":$url."&";
$url = $url."$param=0";
}
// 用正则把url改成正规的
$url = eregi_replace( $param . '=[0-9]+', $param . '=0', $url );
$res = array();
$no_before = $act_page-1;
$no_next = $act_page+1;
//总页数如果小于等于初始化最大呈现页数
if ($page_num<= ($maxpageicon + 1))
{
//如果当前页数是首页  上一页无效
if ($act_page == 1)   
{
$res[0]['url'] = '';
$res[0]['name'] = $name_before;
$res[0]['no'] = $no_before;
}
else            //上一页有效
            {
$res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url );
$res[0]['name'] = $name_before;
$res[0]['no'] = $no_before;  
}
//循环添加页码
$d = 1;
for ($i = 1; $i <= $page_num; $i++)
{
if ($i != $act_page)
{
$res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url );
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
else    //当前页，页码
                {
$res[$d]['url'] = '';
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
$res[$d]['attr'] = 'current';
}
$d++;
}
$last_d = count($res);
//判断尾页
if($act_page == $page_num)    //下一页无效
            {
$res[$last_d]['url'] = '';
$res[$last_d]['name'] = $name_next;
$res[$last_d]['no'] = $no_next;        
}
else
{
$res[$last_d]['url'] = str_replace( $param . '=0', $param . '=' .($act_page + 1), $url );
$res[$last_d]['name'] = $name_next;
$res[$last_d]['no'] = $no_next;
}
}else if ($page_num > ($maxpageicon + 1))//如果总页数满足添加省略号
        {
if ($act_page <= $maxpageicon) //如果当前页小于等于初始化数目
            {
//如果当前页数是首页  上一页无效
if ($act_page == 1)   
{
$res[0]['url'] = '';
$res[0]['name'] = $name_before;
$res[0]['no'] = $no_before;
}
else            //上一页有效
                {
$res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url );
$res[0]['name'] = $name_before;
$res[0]['no'] = $no_before;  
}
//循环添加页码
$d = 1;
for ($i = 1; $i <= $maxpageicon; $i++)
{
if ($i != $act_page)
{
$res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url );
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
else    //当前页，页码
                    {
$res[$d]['url'] = '';
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
$res[$d]['attr'] = 'current';
}
$d++;
}
$last_d = count($res);
//添加省略号
$res[$last_d]['url'] = '';
$res[$last_d]['name'] = '...';
$res[$last_d]['no'] = '';
//总页数
$res[$last_d+1]['url'] = str_replace( $param . '=0', $param . '=' . $page_num, $url );
$res[$last_d+1]['name'] = $page_num;
$res[$last_d+1]['no'] = $page_num;
//下一页
$res[$last_d+1]['url'] = str_replace( $param . '=0', $param . '=' . ($act_page + 1), $url );
$res[$last_d+1]['name'] = $name_next;
$res[$last_d+1]['no'] = $no_next;         
}else//如果当前页大于最大显示页面
            {
if ($act_page > ($page_num - $maxpageicon))//满足后几页
                {
//上一页
$res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url );
$res[0]['name'] = $name_before;
$res[0]['no'] = $no_before;
//第一页
$res[1]['url'] = str_replace( $param . '=0', $param . '=1', $url );
$res[1]['name'] = 1;
$res[1]['no'] = 1;   
//省略号
$res[2]['url'] = '';
$res[2]['name'] = '...';
$res[2]['no'] = '';  
$d = 3;
for ($i = ($page_num - $maxpageicon + 1); $i <= $page_num; $i++)
{
if ($i != $act_page)
{
$res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url );
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
else    //当前页，页码
                        {
$res[$d]['url'] = '';
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
$res[$d]['attr'] = 'current';
}
$d++;
}
$last_d = count($res);
//判断尾页
if($act_page == $page_num)    //下一页无效
                    {
$res[$last_d]['url'] = '';
$res[$last_d]['name'] = $name_next;
$res[$last_d]['no'] = $no_next;        
}
else
{
$res[$last_d]['url'] = str_replace( $param . '=0', $param . '=' .($act_page + 1), $url );
$res[$last_d]['name'] = $name_next;
$res[$last_d]['no'] = $no_next;
}
}else//满足处在中间
                {
//上一页
$res[0]['url'] = str_replace( $param . '=0', $param . '=' .($act_page - 1), $url );
$res[0]['name'] = $name_before;
$res[0]['no'] = $no_before;
//第一页
$res[1]['url'] = str_replace( $param . '=0', $param . '=1', $url );
$res[1]['name'] = 1;
$res[1]['no'] = 1;   
//省略号
$res[2]['url'] = '';
$res[2]['name'] = '...';
$res[2]['no'] = '';  
for ($i = ($act_page - ($maxpageicon - 2) / 2); $i <= floor($act_page+($maxpageicon - 2) / 2); $i++)
{
$i = ceil($i);
if ($i != $act_page)
{
$res[$d]['url'] = str_replace( $param . '=0', $param . '=' . $i, $url );
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
}
else    //当前页，页码
                        {
$res[$d]['url'] = '';
$res[$d]['name'] = $i;
$res[$d]['no'] = $i;
$res[$d]['attr'] = 'current';
}
$d++;
}
$last_d = count($res);
//加省略号
$res[$last_d]['url'] = '';
$res[$last_d]['name'] = '...';
$res[$last_d]['no'] = '';
//当前页
$res[$last_d+1]['url'] = str_replace( $param . '=0', $param . '=' . $page_num, $url );
$res[$last_d+1]['name'] = $page_num;
$res[$last_d+1]['no'] = $page_num;        
//下一页
$res[$last_d+2]['url'] = str_replace( $param . '=0', $param . '=' . ($act_page + 1), $url );
$res[$last_d+2]['name'] = $name_next;
$res[$last_d+2]['no'] = $no_next;
//exit;   
                 }
}
}
return $res;
}
}
?>
　　
　　使用方法 ：



$page_no = $_GET['page_no'] ? $_GET['page_no'] : 1;
$count = 20;
$start = ($page_no-1)*$count;
$end = $start + $count;
$page = new Page_Link();
$page->length = $count;
$page->isFirstPage = true;
$url = $_SERVER['SCRIPT_NAME']."?&a=".$a;
$page_arr = $page->make_page($total_num,$page_no,$url,"page_no");
　　支持多种样式：