php分页类

    <?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 Page($each_disNums, $nums, $current_page, $sub_pages) {  
             $this->each_disNums = intval($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);  
             $this->subPage_link =$_SERVER['PHP_SELF']."?page=";;  
         }  
         /** 
          * 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;  
         }  
     }  
       
      
    //测试一下，看看两种不同效果  
      
    $current_page=isset($_GET['page'])?intval($_GET['page']):1;//获取用户GET提交的page，如果没有就默  
     $t = new Page(10, 100, $current_page, 5);  
     echo $t->subPageCss2();  
     echo "<br>";  
     echo $t->subPageCss1();  
     ?>  

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