php通用分页类代码
- class dividepage{//分页类
- private $total;//要显示的总记录数
- private $url;//请求的url地址
- private $displaypg;//每页显示的记录数,默认为每页显示10条记录
- private $page;//当前页码
- private $lastpg;//总页数,即最后一页的页码
- private $prepg;//前一页
- private $nextpg;//后一页
- private $firstcount;//记录条数开始的序号从0开始
- private $startd;//记录条数开始的记录号.
- private $stopd;//记录条数结束的记录号.
- //构造函数
- public function __construct($url, $total, $displaypg){
- $this->url = $url;//请求的url
- $this->total = $total;//总记录数
- //if($displaypg == '')
- $this->displaypg = $displaypg;//每页显示的记录数
- $this->initdividepage();//初始化分页类
- //echo ','.$this->displaypg;
- }
- //初始化分页类
- private function initdividepage(){
- //分析url
- $parse_url = parse_url($this->url);//将url解释为有固定键值对的数组
- $url_query = $parse_url['query'];//取出url中的查询字符串
- if($url_query){//如果有查询字符串,则删除查询字串中当前页的查询字段如:&page=$page或page=$page
- ereg('(^|&)page=([0-9]*)', $url_query, $k);
- $this->page = $k[2];//取得当前页的值
- $url_query = ereg_replace("(^|&)page=$this->page", '', $url_query);//删除查询字串中当前页的查询字段如:&page=$page或page=$page
- $this->url = str_replace($parse_url['query'], $url_query, $this->url);//保留其他的查询字串,
- $this->page = $this->page ? $this->page : 1;//w如果查询字符串中没有当前页的值就设当前页为1
- if($url_query){//如果有其他查询字符串,则以&page=$page形式添加翻页查询字串
- $this->url .= '&page';
- }else{//如果没有其他查询字串,则以page=$page形式添加翻页查询字串
- $this->url .= 'page';
- }
- }else{//如果没有查询字串,则在url后添加?page=$page形式的翻页查询字串
- $this->page = 1;
- $this->url .= '?page';
- }
- $this->lastpg = ceil($this->total / $this->displaypg);//计算总页数,即最后一页的页码
- $this->page = min($this->lastpg, $this->page);//如果当前页大于总页数,则当前页为最后一页的页码
- $this->prepg = $this->page - 1;//上一页为当前页减一www.111cn.net
- $this->nextpg = $this->page + 1;//(($this->page == $this->lastpg) ? $this->lastpg : ($this->page + 1));//下一页为当前页加一,如果当前页为最后一页,则下一页为0
- $this->firstcount = ($this->page - 1) * $this->displaypg;//计算当前页,记录条数开始的记录号,从0开始.
- $this->startd = $this->total ? ($this->firstcount + 1) : 0;//记录开始号从1开始
- $this->stopd = min($this->firstcount + $this->displaypg, $this->total);//记录结束号
- //echo $this->displaypg;
- //echo $this->nextpg.'+=+='.$this->lastpg;
- }
- public function getpageinfo(){//取得当前页面的基本信息,如:显示第 1-10 条记录,共 23 条记录。
- return '<span class="pageinfostyle">显示第<span class="numstyle">'.$this->startd.'-'.$this->stopd.'</span>条记录,共<span class="numstyle">'.$this->total.'</span>条记录。</span>';
- }
- public function getcommonpagenav(){//取得通常的分页导航,如:首页 上一页 下一页 尾页
- $commonnav = '';
- if($this->lastpg == 1){//如果只有一页,则返回翻页导航,退出,不显示下一页,上一页等。。。
- return $commonnav;
- break;
- }
- $commonnav = '<a href="'.$this->url.'=1" class="compagestyle">首页</a>';//设置首页导航,page=1
- if($this->prepg){
- $commonnav .= '<a href="'.$this->url.'='.$this->prepg.'" class="compagestyle">上一页</a>';
- }else{
- $commonnav .= '<a class="fcompagestyle">上一页</a>';
- }
- if($this->nextpg <= $this->lastpg){
- $commonnav .= '<a href="'.$this->url.'='.$this->nextpg.'" class="compagestyle">下一页</a>';
- }else{
- $commonnav .= '<a class="fcompagestyle">下一页</a>';
- }
- $commonnav .= '<a href="'.$this->url.'='.$this->lastpg.'" class="compagestyle">尾页</a>';//显示尾页链接
- return $commonnav;
- }
- //取得跳转分页导航,如:第n页
- public function getjumppagenav(){
- //<select name='topage' size='1' onchange='window.location="/test/page.php?page="+this.value'>
- $jumpnav = '<span class="pageinfostyle">到第<select name="topage" size="1" class="topage" onchange='window.location="'.$this->url.'="+this.value'>'." ";
- for($i = 1; $i <= $this->lastpg; $i++){
- if($i == $this->page){//把当前页的页码作为默认选项
- $jumpnav .= '<option value="'.$i.'" selected>'.$i.'</option>'." ";
- }else{
- $jumpnav .= '<option value="'.$i.'">'.$i.'</option>'." ";
- }
- }
- $jumpnav .= '</select>页,共<span class="numstyle">'.$this->lastpg.'</span>页</span>';
- return $jumpnav;
- }
- //取得所有的分页导航
- public function getallpagenav(){
- $temp = $this->getpageinfo().$this->getcommonpagenav().$this->getjumppagenav();//开源代码phpfensi.com
- return $temp;
- }
- //取得当前页需显示的记录,在数据库教程中的限定范围,如0-9
- public function getlimitstr(){
- //echo $this->page;
- //echo $this->firstcount;
- //echo $this->dispalypg;
- $temp = $this->firstcount.','.$this->displaypg;
- //echo $temp;
- return $temp;
- }
- }
使用实例,代码如下:
- $result=mysql_query("select * from tb_pagetest");//从数据库中查询所需显示的数据
- $total=mysql_num_rows($result);//查询到的数据的总条数
- $pagesize = 5;//每页显示的记录条数
- $url = $_server['request_uri'];//请求的uri
- $dividepageclass = new dividepage($url, $total, $pagesize); //创建分页类,(类能自动初始化)
- $limitstr = $dividepageclass->getlimitstr();//取得当前页要显示的记录开始序号和每页显示条数,如:0, 5(显示从0开始的5条记录)
- echo $dividepageclass->getallpagenav();//显示所有分页导航条,
- 如:显示第11-13条记录,共13条记录。首页 上一页 下一页 尾页 到*第 1 页,共 3 页
- $sql = 'select * from tb_pagetest limit '.$limitstr;
- $result=mysql_query($sql);//从数据库中取得当前页要显示的记录集,然后显示就ok
- 如:
- while($row=mysql_fetch_array($result))
- echo "<hr><b>".$row[title]." | ".$row[author];