PHP实现的简单分页类及用法示例
本文实例讲述了PHP实现的简单分页类及用法。分享给大家供大家参考,具体如下:
- <?php
- /*
- * 使用:
- * $page = new Page(连接符,查询语句,当前页码,每页大小,页码符)
- * 连接符:一个MYSQL连接标识符,如果该参数留空,则使用最近一个连接
- * 查询语句:SQL语句
- * 当前页码:指定当前是第几页
- * 每页大小:每页显示的记录数
- * 页码符:指定当前页面URL格式
- *
- * 使用例子:
- * $sql = "select * from aa";
- * $page = new Page($conn,$sql,$_GET['page'],4,"?page=");
- *
- * 获得当前页码
- * $page->page;
- *
- * 获得总页数
- * $page->pageCount;
- *
- * 获得总记录数
- * $page->rowCount;
- *
- * 获得本页记录数
- * $page->listSize;
- *
- * 获得记录集
- * $page->list;
- * 记录集是一个2维数组,例:list[0]['id']访问第一条记录的id字段值.
- *
- * 获得页码列表
- * $page->getPageList();
- */
- class Page
- {
- //基础数据
- var $sql;
- var $page;
- var $pageSize;
- var $pageStr;
- //统计数据
- var $pageCount; //页数
- var $rowCount; //记录数
- //结果数据
- var $list = array(); //结果行数组
- var $listSize ;
- //构造函数
- function Page($conn,$sql_in,$page_in,$pageSize_in,$pageStr_in)
- {
- $this->sql = $sql_in;
- $this->page = intval($page_in);
- $this->pageSize = $pageSize_in;
- $this->pageStr = $pageStr_in;
- //页码为空或小于1的处理
- if(!$this->page||$this->page<1)
- {
- $this->page = 1;
- }
- //查询总记录数
- $rowCountSql = preg_replace("/([\w\W]*?select)([\w\W]*?)(from[\w\W]*?)/i","$1 count(0) $3",$this->sql);
- if(!$conn)
- $rs = mysql_query($rowCountSql) or die("bnc.page: error on getting rowCount.");
- else
- $rs = mysql_query($rowCountSql,$conn) or die("bnc.page: error on getting rowCount.");
- $rowCountRow = mysql_fetch_row($rs);
- $this->rowCount=$rowCountRow[0];
- //计算总页数
- if($this->rowCount%$this->pageSize==0)
- $this->pageCount = intval($this->rowCount/$this->pageSize);
- else
- $this->pageCount = intval($this->rowCount/$this->pageSize)+1;
- //SQL偏移量
- $offset = ($this->page-1)*$this->pageSize;
- if(!$conn)
- $rs = mysql_query($this->sql." limit $offset,".$this->pageSize) or die("bnc.page: error on listing.");
- else
- $rs = mysql_query($this->sql." limit $offset,".$this->pageSize,$conn) or die("bnc.page: error on listing.");
- while($row=mysql_fetch_array($rs))
- {
- $this->list[]=$row;
- }
- $this->listSize = count($this->list);
- }
- /*
- * getPageList方法生成一个较简单的页码列表
- * 如果需要定制页码列表,可以修改这里的代码,或者使用总页数/总记录数等信息进行计算生成.
- */
- function getPageList()
- {
- $firstPage;
- $previousPage;
- $pageList;
- $nextPage;
- $lastPage;
- $currentPage;
- //如果页码>1则显示首页连接
- if($this->page>1)
- {
- $firstPage = "<a href="\"".$this-">pageStr."1\">首页</a>";
- }
- //如果页码>1则显示上一页连接
- if($this->page>1)
- {
- $previousPage = "<a href="\"".$this-">pageStr.($this->page-1)."\">上一页</a>";
- }
- //如果没到尾页则显示下一页连接
- if($this->page<$this->pageCount)
- {
- $nextPage = "<a href="\"".$this-">pageStr.($this->page+1)."\">下一页</a>";
- }
- //如果没到尾页则显示尾页连接
- if($this->page<$this->pageCount)
- {
- $lastPage = "<a href="\"".$this-">pageStr.$this->pageCount."\">尾页</a>";
- }
- //所有页码列表
- for($counter=1;$counter<=$this->pageCount;$counter++)
- {
- if($this->page == $counter)
- {
- $currentPage = "<b>".$counter."</b>";
- }
- else
- {
- $currentPage = " "."<a href="\"".$this-">pageStr.$counter."\">".$counter."</a>"." ";
- }
- $pageList .= $currentPage;
- //phpfensi.com
- }
- return $firstPage." ".$previousPage." ".$pageList." ".$nextPage." ".$lastPage." ";
- }
- }
- ?>
用法示例:
- <?php
- @$db = mysql_connect('localhost', 'root', '123456') or
- die("Could not connect to database.");//连接数据库
- mysql_query("set names 'utf8'");//输出中文
- mysql_select_db('test'); //选择数据库
- $sql = "select * from `users`"; //一个简单的查询
- $page = new Page('',$sql,$_GET['page'],5,"?page=");
- $rows = $page->list;
- foreach($rows as $row)
- {
- echo $row['UserName']."<br>";
- }
- echo $page->getPageList(); //输出分页列表
- ?>