使いやすい PHP ページング コードと使用法に適しています

<?php
	class Page {
??		private $total;??? 	//总记录
??		private $pagesize;??	//每页显示多少条
??		private $limit;???		//limit
??		private $page;???		//当前页码
??		private $pagenum;?		//总页码
??		private $url;????		//地址
??		private $bothnum;?		//两边保持数字分页的量
??
??	//构造方法初始化
??	public function __construct($_total, $_pagesize) {
???		$this->total = $_total ? $_total : 1;
???		$this->pagesize = $_pagesize;
??		$this->pagenum = ceil($this->total / $this->pagesize);
???		$this->page = $this->setPage();
???		$this->limit = "LIMIT ".($this->page-1)*$this->pagesize.",$this->pagesize";
???		$this->url = $this->setUrl();
???		$this->bothnum = 2;
??	}
??
??	//拦截器
??	private function __get($_key) {
???		return $this->$_key;
??	}
??
??	//获取当前页码
??	private function setPage() {
???		if (!empty($_GET['page'])) {
????			if ($_GET['page'] > 0) {
?????				if ($_GET['page'] > $this->pagenum) {
??????					return $this->pagenum;
?????				} else {
??????					return $_GET['page'];
?????				}
????			} else {
?????				return 1;
????			}
???		} else {
????			return 1;
???		}
??	}?
??
??	//获取地址
??	private function setUrl() {
???		$_url = $_SERVER["REQUEST_URI"];
???		$_par = parse_url($_url);
???		if (isset($_par['query'])) {
????			parse_str($_par['query'],$_query);
????			unset($_query['page']);
????			$_url = $_par['path'].'?'.http_build_query($_query);
???		}
???		return $_url;
??	}??	//数字目录
??	private function pageList() {
???		for ($i=$this->bothnum;$i>=1;$i--) {
????		$_page = $this->page-$i;
????		if ($_page < 1) continue;
????			$_pagelist .= ' <a href="'.$this->url.'&page='.$_page.'">'.$_page.'</a> ';
???		}
???		$_pagelist .= ' <span class="me">'.$this->page.'</span> ';
???		for ($i=1;$i<=$this->bothnum;$i++) {
???	?		$_page = $this->page+$i;
????			if ($_page > $this->pagenum) break;
????			$_pagelist .= ' <a href="'.$this->url.'&page='.$_page.'">'.$_page.'</a> ';
???		}
???		return $_pagelist;
??	}
??
??	//首页  http://ini.iteye.com/
??	private function first() {
???		if ($this->page > $this->bothnum+1) {
????			return ' <a href="'.$this->url.'">1</a> ...';
???		}
??	}
??
??	//上一页
??	private function prev() {
???		if ($this->page == 1) {
????			return '<span class="disabled">上一页</span>';
???		}
???		return ' <a href="'.$this->url.'&page='.($this->page-1).'">上一页</a> ';
??	}
??
??	//下一页
??	private function next() {
???		if ($this->page == $this->pagenum) {
????			return '<span class="disabled">下一页</span>';
???		}
???		return ' <a href="'.$this->url.'&page='.($this->page+1).'">下一页</a> ';
??	}
??
??	//尾页
??	private function last() {
???		if ($this->pagenum - $this->page > $this->bothnum) {
????			return ' ...<a href="'.$this->url.'&page='.$this->pagenum.'">'.$this->pagenum.'</a> ';
???		}
??	}
??
??	//分页信息
??	public function showpage() {
???		$_page .= $this->first();
???		$_page .= $this->pageList();
???		$_page .= $this->last();
???		$_page .= $this->prev();
???		$_page .= $this->next();
???		return $_page;
??	}
?}
?>

<?php
	$_page = new Page($_total,$_pagesize); //其中 $_total 是数据集的总条数,$_pagesize 是每页显示的数量.
?>