求个具体的php+mysql分页-----不要网上搜的
一、从a页点击在b页进行分页显示
二、分页显示的代码
三、有首页 上页 1 2 3 4 5 下页 末页的功能
四、翻页后能正常显示内容就是点击上页下页能正常显示数据库的数据（a页传来的参数不丢失），
[解决办法]
class page{
private $_page_num;//总页数
private $_page_size=10;//每页条数
private $_page_url;//url链接
private $_limit;//limit1
private $_page_total;//总分页数
private $_page;//分页所传分页值
private $_list_size=10;//这为第二种分页方法显示条数
private $_page_sort=3;//分页两边距离
public function __construct($_total,$_pagesize,$_list_size){
$this->_page_size=$_pagesize;
$this->_page_total=$_total;
$this->_list_size = $_list_size;
$this->_page_num = round($this->_page_total/$this->_page_size);
$this->_page=$this->getnum();
$this->_limit="limit".$this->_page*$this->_page_size.",".$this->_page_total=$_total;
$this->_page_url=$this->seturl();
}
/**
* 获取当前页数
* Enter description here ...
*/
private function getnum(){
if(isset($_GET['page'])){
if(is_numeric($_GET['page'])){
if($_GET['page']>0){
if(ceil($_GET['page'])>=1 && ceil($_GET['page'])<=$this->_page_num){
return ceil($_GET['page']);
}elseif(ceil($_GET['page'])>$this->_page_num){
return $this->_page_num;
}
}else{
return 1;
}
}else{
return 1;
}
}else{
return 1;
}
}
/**
* 转换链接
* Enter description here ...
*/
private function seturl(){
$_url=$_SERVER['REQUEST_URI'];//获取请求地址
$_par=parse_url($_url);//解析url
if(isset($_par['query'])){//判断是否存在aa=bb这种格式
$_url=parse_str($_par['query'],$_query);//重构url
unset($_query['page']);
$_url=$_par['path'].'?'.http_build_query($_query);
}else{
$_url=$_url.'?';
}
return $_url;
}
public function limit(){
return $this->_limit;
}
public function pagenum(){
return $this->_page_num;
}
/*
public function page(){
return $this->_page;
}
public function pageurl(){
return $this->_page_url;
}
*/
private function first(){
return "<a href=".$this->_page_url."&page=1>首页</a>";
}
private function end(){
return "<a href=".$this->_page_url."&page=".$this->_page_num.">尾页</a>";
}
private function prev(){
if($this->_page>1){
return "<a href=".$this->_page_url."&page=".($this->_page-1).">上一页</a>";
}else{
return '上一页';
}
}
public function next(){
if($this->_page<$this->_page_num){
return "<a href=".$this->_page_url."&page=".($this->_page+1).">下一页</a>";
}else{
return '下一页';
}
}
private function pagelist_1(){
$_page='';
for($i=1;$i<=$this->_page_num;$i++){
$_page.="<a href=".$this->_page_url."&page=".$i.">".$i."</a>";
}
return $_page;
}
private function pagelist_2(){
$_page='';
$_page_start=floor($this->_page/$this->_list_size);
$usenum=$this->check(($_page_start*$this->_list_size+10),$this->_page_num);
for($i=$_page_start*$this->_list_size+1;$i<=$usenum;$i++){
$_page.="<a href=".$this->_page_url."&page=".$i.">".$i."</a>";
}
return $_page;
}
private function pagelist_3(){
$page='';
for($i=$this->_page-$this->_page_sort;$i<=$this->_page-1;$i++){
if($i<1)continue;
$page.="<a href=".$this->_page_url."&page=".$i.">".$i."</a>".' ';
}
$page.="<a href=".$this->_page_url."&page=".$this->_page.">".$this->_page."</a>".' ';
for($i=$this->_page+1;$i<=$this->_page+$this->_page_sort;$i++){
if($i>$this->_page_num)break;
$page.="<a href=".$this->_page_url."&page=".$i.">".$i."</a>".' ';
}
return $page;
}
/**
* 没有修正的分页列表
* Enter description here ...
*/
private function pagelist_4(){
$page='';
for($i=$this->_page-$this->_page_sort;$i<=$this->_page-1;$i++){
if($i<1)continue;
$page.="<a href=".$this->_page_url."&page=".$i.">".$i."</a>".' ';
}
$page.="<a href=".$this->_page_url."&page=".$this->_page.">".$this->_page."</a>".' ';
for($i=$this->_page+1;$i<=$this->_page+$this->_page_sort;$i++){
if($i>$this->_page_num)break;
$page.="<a href=".$this->_page_url."&page=".$i.">".$i."</a>".' ';
}
//+1和-1为了排除上一页显示的值，不然会重复
if($this->_page>($this->_page_sort+1) && $this->_page<($this->_page_num-$this->_page_sort)){
$page="<a href=".$this->_page_url."&page=".($this->_page-$this->_page_sort*2-1).">...</a>".$page."<a href=".$this->_page_url."&page=".($this->_page+$this->_page_sort*2+1).">...</a>";
}
return $page;
}
private function check($num1,$num2){
if($num1>$num2){
return $num2;
}else{
return $num1;
}
}
public function showpage($_type){
$_page='';
$_page.=$this->first();//首页
switch($_type){
case '1':
$_page.=$this->pagelist_1();//原始页面列表
break;
case '2':
$_page.=$this->pagelist_2();//原始页面列表
break;
case '3':
$_page.=$this->pagelist_3();//原始页面列表
break;
case '4':
$_page.=$this->pagelist_4();//原始页面列表
break;
default:
$_page.=$this->pagelist_3();//默认原始页面列表
}
$_page.=$this->end();//尾页
$_page.=$this->prev();//上一页
$_page.=$this->next();//下一页
return $_page;
}
}
//$page = new page(220,10,10);
//echo $page->showpage('4');