<?php
class Page{
 private $total; 
 private $listRows; 
 private $limit; 
 private $uri; 
 private $pageNum; 
 private $page; 
 private $config=array(
 'head' => "条记录",
 'prev' => "上一页",
 'next' => "下一页", 
 'first'=> "首页",
 'last' => "末页"
 );
 private $listNum=10;
 public function __construct($total,$listRows=10,$query="",$ord=true){
 
 $this->total=$total;
 $this->listRows=$listRows;
 $this->uri = $this->getUri($query);
 $this->pageNum=ceil($this->total/$this->listRows); 
 if(!empty($_GET["page"])){ 
 $page=$_GET['page'];
 }else{
 if($ord){
 $page = 1;
 }else{
 $page = $this->pageNum;
 }
 }
 if($total>0){
 if(preg_match('/\D/',$page)){
 $this->page = 1;
 }else{
 $this->page = $page; 
 }
 }else{
 $this->page = 0;
 }
 $this->limit="LIMIT ".$this->setLimit(); 
 }
 function set($param,$value){
 if(array_key_exists($param,$this->config)){
 $this->config[$param] = $value;
 }
 return $this;
 }

 function __get($args){
 if($args == "limit"|| $args =="page"){ //过滤非法请求
 return $this->$args;
 }else{
 return null;
 }
 }
 function fpage(){
 $arr = func_get_args();
 $html[0]= "&nbsp;共<b> {$this->total} </b>{$this->config["head"]}&nbsp;"; 
 $html[1]= "&nbsp;本页 <b>".$this->disnum()."</b> 条&nbsp;"; 
 $html[2]= "&nbsp;本页从 <b>{$this->start()}-{$this->end()}</b> 条&nbsp;"; 
 $html[3]= "&nbsp;<b>{$this->page}/{$this->pageNum}</b>页&nbsp;"; 
 $html[4]= $this -> firstprev(); //上一页+首页
 $html[5]= $this -> pageList(); //页码列表1,2,3...
 $html[6]= $this -> nextlast(); //下一页+末页
 $html[7]= $this -> goPage(); 
 $fpage='<div style="font:12px\'5円B8B4円F53\',san-serif;">';
 if(count($arr)<1){
 $arr = array(0,1,2,3,4,5,6,7);
 }
 for($i=0;$i<count($arr);$i++){
 $fpage .=$html[$arr[$i]];
 }
 $fpage .= '</div>';
 return $fpage;
 }
 private function setLimit(){
 if($this->page >0){
 return ($this->page-1)*$this->listRows.", {$this->listRows}";
 }else{
 return 0;
 }
 }
 private function getUri($query){
 $request_uri = $_SERVER["REQUEST_URI"];
 $url = strstr($request_uri,'?') ? $request_uri : $request_uri.'?';
 if(is_array($query)){
 $url .= http_build_query($query); 
 }elseif($query != ""){
 $url .= "&".trim($query,"?&");
 }
 $arr = parse_url($url);
 if(isset($arr["query"])){
 parse_str($arr["query"],$arrs);
 unset($arrs["page"]);
 $url = $arr["path"].'?'.http_build_query($arrs);
 }
 if(strstr($url,'?')){
 if(substr($url,-1) != '?'){
 $url = $url.'&';
 }
 }else{
 $url = $url.'?';
 }
 return $url;
 } 
 private function start(){
 if($this->total==0){
 return 0;
 }else{
 return ($this->page-1)*$this->listRows+1;
 }
 }
 private function end(){
 return min($this->page*$this->listRows,$this->total);
 
 }
 private function firstprev(){
 if($this->page > 1){
 $str = "&nbsp;<a href='{$this->uri}page=1'>{$this->config["first"]}</a>&nbsp;";
 $str .= "<a href='{$this->uri}page=".($this->page-1)."'>{$this->config["prev"]}</a>&nbsp;";
 return $str;
 }
 }
 private function pagelist(){
 $linkPage = "&nbsp;<b>";
 $inum = floor($this->listNum/2);
 for($i=$inum;$i>=1;$i--){
 $page = $this->page-$i;
 if($page>=1)
 $linkPage .= "<a href='{$this->uri}page={$page}'>{$page}</a>&nbsp;";
 }
 if($this->pageNum>1){
 $linkPage .= "<span style='padding:1px 2px; background:#BBB;color:white;'>{$this->page}</span>&nbsp;";
 }
 for($i=1;$i<=$inum;$i++){
 $page = $this->page+$i;
 
 if($page <= $this->pageNum){
 
 $linkPage .= "<a href='{$this->uri}page={$page}'>{$page}</a>&nbsp;"; 
 }else{
 break;
 }
 }
 $linkPage .= '</b>';
 return $linkPage;
 }
 private function nextlast(){
 if($this->page != $this->pageNum){
 $str = "&nbsp;<a href='{$this->uri}page=".($this->page+1)."'>{$this->config["next"]}</a>&nbsp;";
 $str .= "&nbsp;<a href='{$this->uri}page=".($this->pageNum)."'>{$this->config["last"]}</a>&nbsp;";
 return $str;
 }
 }

 private function goPage(){
 if($this->pageNum > 1){
 return '&nbsp;<input style="width:20px;height:17px;!important;height:18px;border:1px solid #cccccc;"
 type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>'.$this->pageNum.')?
 '.$this->pageNum.':this.value;location=\''.$this->uri.'page=\'+page+\'\'}" value=
 "'.$this->page.'"><input style="cursor:pointer;width:25px;height:18px;border:1px solid #cccccc;"
 type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>'.$this->pageNum.
 ')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'page=\'+page+\'\'">&nbsp;';
 }
 
 }
 private function disnum(){
 if($this->total > 0){
 return $this->end()-$this->start()+1;
 }else{
 return 0;
 }
 }

 
 
 
 
}