实例讲述PHP实现简单实用的分页类

时间：2016-04-12 09:59:27 来源：ucbug下载站作者：ucbug下载站

本文实例讲述了PHP实现简单实用的分页类。分享给大家供大家参考，具体如下：

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101 <?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> ';
 }
 $_pagelist .= ' '.$this->page.' ';
 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 $_pagelist;
 }
 //首页
 private function first() {
 if ($this->page > $this->bothnum+1) {
 return ' <a href="'.$this->url.'">1</a> ...';
 }
 }
 //上一页
 private function prev() {
 if ($this->page == 1) {
 return '上一页';
 }
 return ' <a href="'.$this->url.'&page='.($this->page-1).'">上一页</a> ';
 }
 //下一页
 private function next() {
 if ($this->page == $this->pagenum) {
 return '下一页';
 }
 return ' <a href="'.$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;
 }
}
?>