PHP实现的简单分页类及用法示例_php技巧

<?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) { $firstPage = "pageStr."1\">首页"; } //如果页码>1则显示上一页连接 if($this->page>1) { $previousPage = "pageStr.($this->page-1)."\">上一页"; } //如果没到尾页则显示下一页连接 if($this->page<$this->pageCount) { $nextPage = "pageStr.($this->page+1)."\">下一页"; } //如果没到尾页则显示尾页连接 if($this->page<$this->pageCount) { $lastPage = "pageStr.$this->pageCount."\">尾页"; } //所有页码列表 for($counter=1;$counter<=$this->pageCount;$counter++) { if($this->page == $counter) { $currentPage = "".$counter.""; } else { $currentPage = " "."pageStr.$counter."\">".$counter.""." "; } $pageList .= $currentPage; } return $firstPage." ".$previousPage." ".$pageList." ".$nextPage." ".$lastPage." "; } } ?>

<?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']."
"; } echo $page->getPageList(); //输出分页列表 ?>