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class Page{//分页类
var $table;//表名
var $n;//每页显示条数
var $d;//当前页
var $num;//总条数
var $j;//一共几页
var $start;//起始位置
var $url;//当前文件
var $py;//偏移几个单位,以当前页为中心对称偏移
var $yc;//溢出多少个单位，以3,5,7.....
 
function Getallnum($sql){//得到总条数
 global $conn;
 $this->table=$table;
 $all=$conn->GetAll($sql);
 $this->num=count($all);
 return $this->num;
}
function Getallpage($n){//得到一共几页
 $this->n=$n;
 $this->j=ceil($this->num/$this->n);
 return $this->j;
}
function Getpage($d,$url){//分页
 $d=$_GET['page'];
 $this->d=$d;
 $this->url=$url;
 if (empty($this->d) || $this->d <0 || $this->d==0 || $this->d==1){
  $this->d=1;
  if(($this->j)>1){
   $str="首页";
   $str.=$this->mathurl(2,5);
   $str.="下一页";
  }
 }elseif(($this->d)>=$this->j){
  $this->d=$this->j;
  $str="上一页";
  $str.=$this->mathurl(2,5);
  $str.="尾页";
 }else{
  $str="上一页";
  $str.=$this->mathurl(2,5);
  $str.="下一页";
 }
 return $str;
 return $this->d;
 return $this->url;
}
function Getstart(){//起始位置
 if(empty($this->d)){
  $this->start=0;
 }else{
  $this->start=$this->n*($this->d-1);
 }
 return $this->start;
}
function Getend($e){//每页显示条数
 return $this->d=$e;
}
function options(){//跳转菜单
 $opt=" ";
 return $opt;
}
function mathurl($py,$yc){//数字导航
 $this->py=$py;
 $this->yc=$yc;
 $co=$_GET['page'];//当前页码
 $do=$this->j;//总页数
 if($this->j<=$this->yc){//总页数小于或等于$yc时
  for ($o=1;$o<=$this->j;$o++){
   $murl.=" ".$o." ";
  }  
 }elseif($co>($do-$this->py)){//页码超过总页数时
  $co=$do;
  for ($v=($co-($this->yc-1));$v<=$do;$v++){//往左偏移$yc个单位
   $murl.=" ".$v." ";
  }
 }elseif($co<=$this->py){
  $co=1;
  for ($v=$co;$v<($co+$this->yc);$v++){//往右偏移$yc个单位
   $murl.=" ".$v." ";
  }
 }else{
  for($k=($co-$this->py);$k<$co;$k++){//往左偏移$py个单位
  $murl.=" ".$k." ";
  }  
  for ($v=$co;$v<=($co+$this->py);$v++){//往右偏移$py个单位
   $murl.=" ".$v." ";
  }
 }
 return $murl;  
}
}/*
require_once("../class/Smarty.class.php");
include "../adodb/adodb.inc.php";
include "../connect.php";
$page=new Page();
$sql="select * from class";
$p['num']=$page->Getallnum($sql);
$p['page']=$page->Getallpage(10);
$p['link']=$page->Getpage(1,"class.inc.php?");
$p['start']=$page->Getstart(0);
$p['end']=$page->Getend(10);
$p['opt']=$page->options();
$a=$conn->GetAll("select * from class limit ".$p['start'].",".$p['end']."");
--------------------------上面的是数据库分页的例子-------------------------------
--------------------------下面的是搜索分页的例子--------------------------------------
$s=$_GET['s'];
$si=$_POST['s'];
if(empty($_GET['key'])){
$key=$si;
}else{
$key=$_GET['key'];
}
if($s=="s"){
$page=new Page();
$sqa="select cname from class where cname like binary  '%".$key."%'";
$p['num']=$page->Getallnum($sqa);
$p['page']=$page->Getallpage(6);
$p['link']=$page->Getpage(1,"class.inc.php?s=s&key=".$key."&");
$p['start']=$page->Getstart(0);
$p['end']=$page->Getend(6);
$sql="select cname from class where cname like binary  '%".$key."%' limit ".$p['start'].",".$p['end']."";  
$rs=$conn->GetAll($sql);
}
-------------------------下面的是smarty应用-------------------------------------------------
$smarty = new Smarty;
$smarty->assign("page",$p);
$smarty->assign("show",$a);
//$smarty->assign("se",$rs);
$smarty->display('class.inc.htm');
*/
?>

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/499/
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