php数组分页类

<?php
    class ArrayPage{
        public $totalPage;//全部页数
        public $lists;//每页显示数目
        public $arr = array();//分页的数组
        public $url = '';//分页地址
        public $order;
        public $_error = '一切正常';//报错提示
        public function __construct(array $arr,$lists = 10,$url,$order =0){
            if( empty($arr) ){
                $this->_error = '数组不存在';
                return false;
            }
            if($url == ''){
                $this->_error = '域名地址不可缺少';
                return false;
            }
            $this->lists = $lists;
            $this->url = $url;
            $this->arr = $arr;
            $count = count($arr);
            $this->totalPage = ceil($count / $this->lists);
        }
        
        public function getData(){
            $page = empty($_GET['page'])?1:$_GET['page'];
            $start = ($page - 1)*$this->lists;
            //return $this->lists;
            if($this->order == 1){
                $this->arr = array_reverse($this->arr);
            }
            $res = array_slice($this->arr,$start,$this->lists);
            return $res;
        }
        
        public function getShow(){
            $page = empty($_GET['page'])?1:$_GET['page'];
            if($page > 1){
                $prevPage = $page-1;
            }else{
                $prevPage = 1;
            }
            
            if($page < $this->totalPage){
                $nextPage = $page+1;
            }else{
                $page = $this->totalPage;
            }
            $str = '<div style="border:1px; width:300px; height:30px; color:#9999CC">';
            $str .= "<span>共  {$this->totalPage}  页 / 第 {$page} 页</span>";
            $str .= "<span><a href='{$this->url}?page=1'>   首页  </a></span>";
            if($page == 1){
                $str .= "<span> 上一页  </span>";
            }else{
                $str .= "<span><a href='{$this->url}?page={$prevPage}'> 上一页  </a></span>";
            }
            if($page == $this->totalPage){
                $str .= "<span>下一页  </span>";
            }else{
                $str .= "<span><a href='{$this->url}?page={$nextPage}'>下一页  </a></span>";
            }
            $str .= "<span><a href='{$this->url}?page={$this->totalPage}'>尾页  </a></span>";
            $str .= '</div>';
            return $str;
        }
        
        public function getError(){
            return $this->_error;
        }
    }
    for($i =0;$i<100;$i++){
        $arr[$i] = $i*10;
    }
    $page = new ArrayPage($arr,10,'http://localhost/testSvn/arrayPage.php',0);
    $res = $page->getData();
    echo $page->getShow();