Page.php

<?php
namespace Util;

class Page {
    
    // 分页栏每页显示的页数
    public $rollPage = 5;
    // 页数跳转时要带的参数
    public $parameter  ;
    // 分页URL地址
    public $url     =   '';
    // 默认列表每页显示行数
    public $listRows = 20;
    // 起始行数
    public $firstRow    ;
    // 分页总页面数
    protected $totalPages  ;
    // 总行数
    protected $totalRows  ;
    // 当前页数
    protected $nowPage    ;
    // 分页的栏的总页数
    protected $coolPages   ;
    // 分页显示定制
    protected $config  =    array('header'=>'条记录','prev'=>'上一页','next'=>'下一页','first'=>'第一页','last'=>'最后一页','theme'=>'  %nowPage%/%totalPage%页 %upPage%  %linkPage% %downPage% %first%  %prePage%  %nextPage% %end% %totalRow%%header%');
    // 默认分页变量名
    protected $varPage  = 'p';

    /**
     * 架构函数
     * @access public
     * @param array $totalRows  总的记录数
     * @param array $listRows  每页显示记录数
     * @param array $parameter  分页跳转的参数
     */
    public function __construct($totalRows, $listRows='', $p = 1) {
        $this->totalRows    =   $totalRows;
        if(!empty($listRows)) {
            $this->listRows =   intval($listRows);
        }
        $this->totalPages   =   ceil($this->totalRows/$this->listRows);     //总页数
        $this->coolPages    =   ceil($this->totalPages/$this->rollPage);
        $this->nowPage      =   $p;
        if($this->nowPage<1){
            $this->nowPage  =   1;
        }elseif(!empty($this->totalPages) && $this->nowPage>$this->totalPages) {
            $this->nowPage  =   $this->totalPages;
        }
        $this->firstRow     =   $this->listRows*($this->nowPage-1);
    }
	
    public function getPage()
    {
        $count = intval($this->totalRows);
        $total = intval($this->totalPages);
        $now = intval($this->nowPage);
        $roll = intval($this->rollPage);
        if ($roll == 0)
            $roll = 5;
        $page = array();
        $page['size'] = intval($this->listRows);
        $page['count'] = $count;
        $page['total'] = $total;
        $page['now'] = $now;
        $page['prev'] = $now < 2 ? 0 : $now - 1;
        $page['next'] = $now < $total ?  $now + 1 : 0;
        if ($roll > $total)
            $roll = $total;
        $roll1 = intval(ceil($roll/2));
        $page['up'] = $now-$roll > 0 ? $now-$roll : 1;
        $page['down'] = $now+$roll < $total ? $now+$roll : $total;
        if ($now < $roll1) {
            $j = 0;
        } else {
            $j = $now + $roll1 <= $total ? $now - $roll1 : $total - $roll;
        }
        $page['list'] = array();
        for ($i = 0; $i < $roll; $i ++) {
            ++ $j;
            if ($j > $total)
                break;
            $page['list'][] = $j;
        }
        return $page;
    }

    /**
     * 分页显示输出
     * @access public
     */
	/*
    public function show() {
        if(0 == $this->totalRows) return '';
        $p              =   $this->varPage;
        $nowCoolPage    =   ceil($this->nowPage/$this->rollPage);

        // 分析分页参数
        if($this->url){
            //$depr       =   C('URL_PATHINFO_DEPR');
            //$url        =   rtrim(U('/'.$this->url,'',false),$depr).$depr.'__PAGE__';
        }else{
            if($this->parameter && is_string($this->parameter)) {
                parse_str($this->parameter,$parameter);
            }elseif(is_array($this->parameter)){
                $parameter      =   $this->parameter;
            }elseif(empty($this->parameter)){
                unset($_GET['p']);
                $var =  !empty($_POST)?$_POST:$_GET;
                if(empty($var)) {
                    $parameter  =   array();
                }else{
                    $parameter  =   $var;
                }
            }
            $parameter[$p]  =   '__PAGE__';
            $url            =	''; 
        }
        //上下翻页字符串
        $upRow          =   $this->nowPage-1;
        $downRow        =   $this->nowPage+1;
        if ($upRow>0){
            $upPage     =   "<a href='".str_replace('__PAGE__',$upRow,$url)."'>".$this->config['prev']."</a>";
        }else{
            $upPage     =   '';
        }

        if ($downRow <= $this->totalPages){
            $downPage   =   "<a href='".str_replace('__PAGE__',$downRow,$url)."'>".$this->config['next']."</a>";
        }else{
            $downPage   =   '';
        }
        // << < > >>
        if($nowCoolPage == 1){
            $theFirst   =   '';
            $prePage    =   '';
        }else{
            $preRow     =   $this->nowPage-$this->rollPage;
            $prePage    =   "<a href='".str_replace('__PAGE__',$preRow,$url)."' >上".$this->rollPage."页</a>";
            $theFirst   =   "<a href='".str_replace('__PAGE__',1,$url)."' >".$this->config['first']."</a>";
        }
        if($nowCoolPage == $this->coolPages){
            $nextPage   =   '';
            $theEnd     =   '';
        }else{
            $nextRow    =   $this->nowPage+$this->rollPage;
            $theEndRow  =   $this->totalPages;
            $nextPage   =   "<a href='".str_replace('__PAGE__',$nextRow,$url)."' >下".$this->rollPage."页</a>";
            $theEnd     =   "<a href='".str_replace('__PAGE__',$theEndRow,$url)."' >".$this->config['last']."</a>";
        }
        // 1 2 3 4 5
        $linkPage = "";
        for($i=1;$i<=$this->rollPage;$i++){
            $page       =   ($nowCoolPage-1)*$this->rollPage+$i;
            if($page!=$this->nowPage){
                if($page<=$this->totalPages){
                    $linkPage .= "<a href='".str_replace('__PAGE__',$page,$page)."'>".$page."</a>";
                }else{
                    break;
                }
            }else{
                if($this->totalPages != 1){
                    $linkPage .= "<span class='current'>".$page."</span>";
                }
            }
        }
        $pageStr     =   str_replace(
            array('%header%','%nowPage%','%totalRow%','%totalPage%','%upPage%','%downPage%','%first%','%prePage%','%linkPage%','%nextPage%','%end%'),
            array($this->config['header'],$this->nowPage,$this->totalRows,$this->totalPages,$upPage,$downPage,$theFirst,$prePage,$linkPage,$nextPage,$theEnd),$this->config['theme']);      
        return $pageStr;
    }
	 */

}