php动态分页类

 <?php

 /**
  *  页面名称：cls_page.php
  */
 class Page {
     private $each_disNums; //每页显示的条目数
     private $nums; //总条目数
     private $current_page; //当前被选中的页
     private $sub_pages; //每次显示的页数
     private $pageNums; //总页数
     private $page_array = array (); //用来构造分页的数组
     private $subPage_link; //每个分页的链接

     /**
      *
      * __construct是SubPages的构造函数，用来在创建类的时候自动运行.
      * @$each_disNums   每页显示的条目数
      * @nums     总条目数
      * @current_num     当前被选中的页
      * @sub_pages       每次显示的页数
      * @subPage_link    每个分页的链接
      * @subPage_type    显示分页的类型
      *
      * 当@subPage_type=1的时候为普通分页模式
      *    example：   共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]
      *    当@subPage_type=2的时候为经典分页样式
      *     example：   当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]
      */
     function __construct($each_disNums, $nums, $current_page, $sub_pages, $subPage_link) {
         $this->each_disNums = intval($each_disNums);
         $this->nums = intval($nums);
         if (!$current_page) {
             $this->current_page = 1;
         } else {
             $this->current_page = intval($current_page);
         }
         $this->sub_pages = intval($sub_pages);
         $this->pageNums = ceil($nums / $each_disNums);
         $this->subPage_link = $subPage_link;
     }
     /**
      * 照顾低版本
      */
     /*
     function __construct($each_disNums, $nums, $current_page, $sub_pages, $subPage_linke) {
         $this->Page($each_disNums, $nums, $current_page, $sub_pages, $subPage_link);

     }
     */

     /*
      __destruct析构函数，当类不在使用的时候调用，该函数用来释放资源。
     */
     function __destruct() {
         unset ($each_disNums);
         unset ($nums);
         unset ($current_page);
         unset ($sub_pages);
         unset ($pageNums);
         unset ($page_array);
         unset ($subPage_link);
     }

     /*
      用来给建立分页的数组初始化的函数。
     */
     function initArray() {
         for ($i = 0; $i < $this->sub_pages; $i++) {
             $this->page_array[$i] = $i;
         }
         return $this->page_array;
     }

     /*
      construct_num_Page该函数使用来构造显示的条目
      即使：[1][2][3][4][5][6][7][8][9][10]
     */
     function construct_num_Page() {
         if ($this->pageNums < $this->sub_pages) {
             $current_array = array ();
             for ($i = 0; $i < $this->pageNums; $i++) {
                 $current_array[$i] = $i +1;
             }
         } else {
             $current_array = $this->initArray();
             if ($this->current_page <= 3) {
                 for ($i = 0; $i < count($current_array); $i++) {
                     $current_array[$i] = $i +1;
                 }
             }
             elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1) {
                 for ($i = 0; $i < count($current_array); $i++) {
                     $current_array[$i] = ($this->pageNums) - ($this->sub_pages) + 1 + $i;
                 }
             } else {
                 for ($i = 0; $i < count($current_array); $i++) {
                     $current_array[$i] = $this->current_page - 2 + $i;
                 }
             }
         }

         return $current_array;
     }

     /*
     构造普通模式的分页
     共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]
     */
     function subPageCss1() {
         $subPageCss1Str = "";
         $subPageCss1Str .= "共" . $this->nums . "条记录，";
         $subPageCss1Str .= "每页显示" . $this->each_disNums . "条，";
         $subPageCss1Str .= "当前第" . $this->current_page . "/" . $this->pageNums . "页 ";
         if ($this->current_page > 1) {
             $firstPageUrl = $this->subPage_link . "1";
             $prewPageUrl = $this->subPage_link . ($this->current_page - 1);
             $subPageCss1Str .= "[<a href='$firstPageUrl'>首页</a>] ";
             $subPageCss1Str .= "[<a href='$prewPageUrl'>上一页</a>] ";
         } else {
             $subPageCss1Str .= "[首页] ";
             $subPageCss1Str .= "[上一页] ";
         }

         if ($this->current_page < $this->pageNums) {
             $lastPageUrl = $this->subPage_link . $this->pageNums;
             $nextPageUrl = $this->subPage_link . ($this->current_page + 1);
             $subPageCss1Str .= " [<a href='$nextPageUrl'>下一页</a>] ";
             $subPageCss1Str .= "[<a href='$lastPageUrl'>尾页</a>] ";
         } else {
             $subPageCss1Str .= "[下一页] ";
             $subPageCss1Str .= "[尾页] ";
         }

         return $subPageCss1Str;

     }

     /*
     构造经典模式的分页
     当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]
     */
     function subPageCss2() {
         $subPageCss2Str = "";
         $subPageCss2Str .= "当前第" . $this->current_page . "/" . $this->pageNums . "页 ";

         if ($this->current_page > 1) {
             $firstPageUrl = $this->subPage_link . "1";
             $prewPageUrl = $this->subPage_link . ($this->current_page - 1);
             $subPageCss2Str .= "[<a href='$firstPageUrl'>首页</a>] ";
             $subPageCss2Str .= "[<a href='$prewPageUrl'>上一页</a>] ";
         } else {
             $subPageCss2Str .= "[首页] ";
             $subPageCss2Str .= "[上一页] ";
         }

         $a = $this->construct_num_Page();
         for ($i = 0; $i < count($a); $i++) {
             $s = $a[$i];
             if ($s == $this->current_page) {
                 $subPageCss2Str .= "[<span style='color:red;font-weight:bold;'>" . $s . "</span>]";
             } else {
                 $url = $this->subPage_link . $s;
                 $subPageCss2Str .= "[<a href='$url'>" . $s . "</a>]";
             }
         }

         if ($this->current_page < $this->pageNums) {
             $lastPageUrl = $this->subPage_link . $this->pageNums;
             $nextPageUrl = $this->subPage_link . ($this->current_page + 1);
             $subPageCss2Str .= " [<a href='$nextPageUrl'>下一页</a>] ";
             $subPageCss2Str .= "[<a href='$lastPageUrl'>尾页</a>] ";
         } else {
             $subPageCss2Str .= "[下一页] ";
             $subPageCss2Str .= "[尾页] ";
         }
         return $subPageCss2Str;
     }
 }

 ?>

 <?
  class sqldao{
  //连接数据库
     function conn(){
     $dbh=mysql_connect('localhost','username','pass')or die("对不起,数据库连接错误!请稍候再来,或与管理员联系");
     mysql_query("set names 'utf8'", $dbh);
     mysql_select_db('tableName');
     return $dbh;
     }
  }
 ?>

 <?
 //以下为测试代码
 $sqldao=new sqldao();
 $dbh=$sqldao->conn();

 $start=($_GET['p']-1)*10;
 $que="select utname from renyuan";
 $rs=mysql_query($que,$dbh);
 $num_all=mysql_num_rows($rs);

 $rs=mysql_query($que." limit ".$start.",10",$dbh);
 $num=mysql_num_rows($rs);
 for($i=0;$i<$num;$i++){
 $row=mysql_fetch_array($rs);
 echo $row['utname']."<br>";
 }

 echo "<hr>";
 //测试一下，看看两种不同效果
 //$t = new Page(显示条数, 数据总数, 页数, 页数链接个数, '页面链接');
 $t = new Page(10, $num_all, $_GET['p'], 10, 'cls_page.php?p=');
 echo $t->subPageCss2();
 echo "<p>";
 echo $t->subPageCss1();

 ?>