PHP paging class code example, paging class that can be used in the PHP framework

//php分页类代码
class page{
 public $page; //当前页
 public $pagenum;  // 页数
 public $pagesize;  // 每页显示条数
 public function __construct($count, $pagesize){
  $this->pagenum = ceil($count/$pagesize);
  $this->pagesize = $pagesize;
  $this->page =(isset($_GET['p'])&&$_GET['p']>0) ? intval($_GET['p']) : 1;
 }
 /**
 * Get the parameters passed by get after the url
*/
 public function getUrl(){
  $url = 'index.php?'.http_build_query($_GET);
  $url = preg_replace('/[?,&]p=(w)+/','',$url);
  $url .= (strpos($url,"?") === false) ? '?' : '&';
  return $url;
 }
 /**
 * Get paginated html
*/
 public function getPage(){
  $url = $this->getUrl();
  $start = $this->page-5;
  $start=$start>0 ? $start : 1;
  $end   = $start+9;
  $end = $end<$this->pagenum ? $end : $this->pagenum;
  $pagestr = '';
  if($this->page>5){
   $pagestr = "首页 ";
  }
  if($this->page!=1){
   $pagestr.= "上一页";
  }

  for($i=$start;$i<=$end;$i++){
   $pagestr.= "".$i."  ";
  }
  if($this->page!=$this->pagenum){
   $pagestr.="下一页";

  }
  if($this->page+5<$this->pagenum){
   $pagestr.="尾页 ";
  }
  return $pagestr;
 } // edit: bbs.it-home.org

}
// 分页代码测试
$page = new page(100,10);
$str=$page->getPage();
echo $str;
?>