php mysql数据库操作分页类

            $this->img_btn[2]    = "<img src='".$this->img_path.$this->img[2]."' alt='下一页' border='0' align='absmiddle'/>";
            $this->img_btn[3]    = "<img src='".$this->img_path.$this->img[3]."' alt='末页' border='0' align='absmiddle'/>";
        }
        function set_show_page(){
            $this->set_img();        //设置翻页图片路径
            $this->set_url();
            $this->set_total_records();
            if ($this->total_records<$this->page_size){
                $this->total_pages = 1;
            }else{
                $this->total_pages = ceil($this->total_records/$this->page_size);
            }
            if ($this->page>$this->total_pages){
                $this->page = $this->total_pages;
            }
        }
        function show_first_prv(){
            if ($this->page==1){
                $str = "<strong>".$this->img_btn[0]."</strong> <strong>".$this->img_btn[1]."</strong>";
            }else{
                $str = "<a href='".$this->url."1"."'>".$this->img_btn[0]."</a> ";    //此处1为首页，page值为1
                $str.= "<a href='".$this->url.($this->page-1)."'>".$this->img_btn[1]."</a>";
            }