PHP之分页类

<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2016/6/22
* Time: 21:37
*/

Class Page{
protected $sum;  //总记录数
protected $page_show; //每页显示多少记录
protected $totalpage; //总页数
protected $page; //当前页面
protected $limit;
protected $url;
protected $start; //开始
protected $end; //结束

function __construct($sum,$row=1)
{
$this->sum=$sum;  //总记录数
$this->page_show=$row;  //每页显示
$this->totalpage=ceil($this->sum/$this->page_show);//总页数
$this->url=$this->curUrl();  //地支
$this->page=$this->curPage();  //当前页

$this->start=($this->page-1)*$this->page_show;  //起始页

}
//获取当前页
//min($this->totalpage,max((int)@$_GET['page'],1));
public function curPage()
{
if(!empty($_GET['page']))
{
if($_GET['page']>$this->totalpage)
{
$page=$this->totalpage;
}else{
$page=$_GET['page'];
}
}else{
$page=1;
}
return $page;

}

//获取当前地址
public function curUrl(){
//        $_url=$_SERVER['REUQEST_URI'];  //当前的Url
//        $_par=parse_url($_url);  //分解当前URL
//        if(isset($_par['query']))
//        {
//
//        }

$curUrl=isset($_SERVER['REQUEST_URI'])?$_SERVER['REQUEST_URI']:$_SERVER['PHP_SELF'].$_SERVER['QUERY_STRING'];
//解析字符串
$parseURL=parse_url($curUrl);  //分解获取查询字符串
if(isset($parseURL['query']))
{
parse_str($parseURL['query'],$arr);  //将字符串解析成变量,并放去数组中
unset($arr['page']);
//$curUrl=$parseURL['path']."?".http_build_query($arr);
$curUrl = $parseURL['path']."?".http_build_query($arr)."&page=";
//var_dump($curUrl);
}else{
$curUrl=strstr($curUrl,"?")?$curUrl."page=":$curUrl."?page=";
}
return $curUrl;
}

//分页查询记录数
public  function limit()
{
return "LIMIT {$this->start},{$this->page_show}";
}

//上一页
public function pre()
{
return $this->page>1?"<a href='".$this->url.($this->page-1)."'>上一页</a>":'1';
}

//下一页
public function next(){
return $this->page<$this->totalpage?"<a href='".$this->url.($this->page+1)."'>下一页</a>":'';
}

//首页
public function index()
{
return $this->page>1?"<a href='{$this->url}1'>首页</a>":'1';
}

//未接
public function end()
{
return $this->page<$this->totalpage?"<a href='{$this->url}{$this->totalpage}'>未页</a>":'';
}
//总页数
public function count()
{
return "<span>总页{$this->totalpage}  总计{$this->sum}条</span>";
}

//页码数组
public function pagearray()
{
$pagelist=array();
for($i=1;$i<$this->totalpage;$i++)
{
if($i==$this->page){
$pagelist[$i]['url']="";
$pagelist[$i]['str']=$i;
continue;
}
$pagelist[$i]['url']=$this->url.$i;
$pagelist[$i]['str']=$i;
}
return $pagelist;

}

//下拉列表

public function select()
{
$arr=$this->pagearray();
$str="<select class='s' onchange='javascript:location.href=this.options[selectedIndex].value'>";
foreach($arr as $v)
{
$str.=empty($v['url'])?"<option value='{$this->url}{$v['str']}' selected='selected'>{$v['str']}</option>":"<option value='{$v['url']}'>{$v['str']}</option>";
}
$str.="</select>";
return $str;
}

}

$p=new Page(20);
echo $p->index();
echo "</br>";
//echo $p->curUrl();
echo "</br>";
echo $p->end();
echo $p->count();
echo $p->select();