新手提问分页类的一个输出循环显示分页遇到问题，求解？


<?php
class PageClass {
private $total_record;//总记录
private $page_size;//页记录数
private $current_page;//当前页
private $total_page_size;//总页数
private $page_url;   //页面url
private $page_start;  //起始页
private $page_stop;//结束页
public $page_limit;  //limit,
    function __construct($total_record=0,$page_size=1,$current_page=1,$page_url) {
     $this->total_record=$this->numeric($total_record);
     $this->page_size=$this->numeric($page_size);
     $this->current_page=$this->numeric($current_page);
     $this->page_limit=($this->current_page*$this->page_size)-$this->page_size;
        $this->page_url=$page_url;
        if($this->current_page<1){
         $this->current_page=1;
        }        if($this->current_page<0){
         $this->current_page=0;
        }
        $total_page_size = ceil($total_record/$page_size);        if($this->total_page_size<1){
         $this->total_page_size=1;
        }
        if($this->current_page>$this->total_page_size){
         $this->crrent_page=$this->total_page_size;
        }
        $this->page_start=$this->current_page;
        $this->page_stop=$this->current_page+5;
        if($this->page_stop>$this->total_page_size){
         $this->page_stop=$this->total_page_size;
         $this->page_start=$this->page_stop-5;
        }
        if($this->page_start<1){
         $this->page_start=1;
         if($this->page_stop > $this->total_page_size){
         $this->page_stop=$this->total_page_size;
         }
        }
    }    private function numeric($id){
        if(strlen($id)){
         if(!ereg("^[0-9]+$",$id)){ 
          $id=1;
         }
        }
        else{
         $id=1;
        }
        return $id;
    }
    private function page_replace($page){
     return str_replace("{page}",$page,$this->page_url);
    }
    //首页
    private function home(){
     if($this->current_page!=1){
     return "<a href=\" ".$this->page_replace(1)."  \" title=\" 首页 \">首页</a>\n";
     }
     else{
     return "首页";
     }
    }
    //上一页
    private function page_up(){
     if($this->current_page != 1){
     return "<a class=\"number\" href=\" ".$this->page_replace($this->current_page-1)."  \" title=\"上一页\">上一页</a>\n  ";
     }
     else{
     return "<a class=\"number\">上一页</a>";
     }
    }
    //下一页
    private function page_down(){
     if($this->current_page!=$this->total_page_size){
     return  "<a class=\"number\" class='nolink nextpage' href= \"  ".$this->page_replace($this->current_page+1)."  \" title=\"下一页\">下一页</a> \n";
     }
     else{
     return "<a class=\"number\" class='nolink nextpage'>下一页</a>";
     }
    }
    //尾页
    private function page_end(){
     if($this->current_page!=$this->total_page_size){
     return "<a href=\" ".$this->page_replace($this->total_page_size)." \" title=\"尾页\">尾页</a>";
     }
    }
   public function output($id='page'){
    $str = "<form action='' name='formpage' method=post><a>共有 ";
    $str.= "<B>$this->total_record"."条/".$this->current_page."页</B> </a>";
    $str.= $this->page_up();//调用方法显示上一页    //以下显示  分页
        for($page_for_i=$this->page_start;$page_for_i <= $this->page_stop;  $page_for_i++){
    if($this->current_page==$page_for_i){
    $str.=" <a class=\"number current\">$page_for_i</a> ";
    }else{
    $str.=" <a href=\"  .$this->page_replace($page_for_i). \" title=\"第".$page_for_i."页\" ";
    $str.=$page_for_i."</a>";
    }
   }   $str.=$this->page_down();  //调用下一页
   return $str;
   }}
$page = new PageClass(1000,5,$_GET[page],'?page={page}');
echo $page -> output();//显示
?>
为什么在其他成员函数里echo $this->page_stop的值是1啊？但在构造函数里为5 导致  output的for循环总是输出1   我想循环显示  哪里错误了？  
类phpclassfunction