php分頁類

    <?php


 class Page {  
     private $each_disNums; //每頁顯示的條目數  
     private $nums; //總條目數  
     private $current_page; //當前被選中的頁  
     private $sub_pages; //每次顯示的頁數  
     private $pageNums; //總頁數  
     private $page_array = array (); //用來構造分頁的數組  
     private $subPage_link; //每個分頁的鏈接  
     /** 
      * 
      * __construct是SubPages的構造函數，用來在創建類的時候自動運行. 
      * @$each_disNums   每頁顯示的條目數 
      * @nums     總條目數 
      * @current_num     當前被選中的頁 
      * @sub_pages       每次顯示的頁數 
      * @subPage_link    每個分頁的鏈接 
      * @subPage_type    顯示分頁的類型 
      * 
      * 當@subPage_type=1的時候為普通分頁模式 
      *    example：   共4523條記錄,每頁顯示10條,當前第1/453頁 [首頁] [上頁] [下頁] [尾頁] 
      *    當@subPage_type=2的時候為經典分頁樣式 
      *     example：   當前第1/453頁 [首頁] [上頁] 1 2 3 4 5 6 7 8 9 10 [下頁] [尾頁] 
      */  
     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=";;  
     }  
     /** 
      * 照顧低版本 
      */  
     /*function __construct($each_disNums, $nums, $current_page, $sub_pages, $subPage_linke) { 
         $this->Page($each_disNums, $nums, $current_page, $sub_pages, $subPage_link); 
     } 
 */  
    /* 
      __destruct析構函數，當類不在使用的時候調用，該函數用來釋放資源。 
     */  
     function __destruct() {  
         unset ($each_disNums);  
         unset ($nums);  
         unset ($current_page);  
         unset ($sub_pages);  
         unset ($pageNums);  
         unset ($page_array);  
         unset ($subPage_link);  
     }  

    /* 
      用來給建立分頁的數組初始化的函數。 
     */  
     function initArray() {  
         for ($i = 0; $i < $this->sub_pages; $i++) {  
             $this->page_array[$i] = $i;  
         }  
         return $this->page_array;  
     }  

    /* 
      construct_num_Page該函數使用來構造顯示的條目 
      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;  
     }  

    /* 
     構造普通模式的分頁 
     共4523條記錄,每頁顯示10條,當前第1/453頁 [首頁] [上頁] [下頁] [尾頁] 
     */  
     function subPageCss1() {  
         $subPageCss1Str = "";  
         $subPageCss1Str .= "共" . $this->nums . "條記錄，";  
         $subPageCss1Str .= "每頁顯示" . $this->each_disNums . "條，";  
         $subPageCss1Str .= "當前第" . $this->current_page . "/" . $this->pageNums . "頁 ";  
         if ($this->current_page > 1) {  
             $firstPageUrl = $this->subPage_link . "1";  
             $prewPageUrl = $this->subPage_link . ($this->current_page - 1);  
             $subPageCss1Str .= "[<a href='$firstPageUrl'>首頁</a>] ";  
             $subPageCss1Str .= "[<a href='$prewPageUrl'>上一頁</a>] ";  
         } else {  
             $subPageCss1Str .= "[首頁] ";  
             $subPageCss1Str .= "[上一頁] ";  
         }  

        if ($this->current_page < $this->pageNums) {  
             $lastPageUrl = $this->subPage_link . $this->pageNums;  
             $nextPageUrl = $this->subPage_link . ($this->current_page + 1);  
             $subPageCss1Str .= " [<a href='$nextPageUrl'>下一頁</a>] ";  
             $subPageCss1Str .= "[<a href='$lastPageUrl'>尾頁</a>] ";  
         } else {  
             $subPageCss1Str .= "[下一頁] ";  
             $subPageCss1Str .= "[尾頁] ";  
         }  

        return $subPageCss1Str;  

    }  

    /* 
     構造經典模式的分頁 
     當前第1/453頁 [首頁] [上頁] 1 2 3 4 5 6 7 8 9 10 [下頁] [尾頁] 
     */  
     function subPageCss2() {  
         $subPageCss2Str = "";  
         $subPageCss2Str .= "當前第" . $this->current_page . "/" . $this->pageNums . "頁 ";  

        if ($this->current_page > 1) {  
             $firstPageUrl = $this->subPage_link . "1";  
             $prewPageUrl = $this->subPage_link . ($this->current_page - 1);  
             $subPageCss2Str .= "[<a href='$firstPageUrl'>首頁</a>] ";  
             $subPageCss2Str .= "[<a href='$prewPageUrl'>上一頁</a>] ";  
         } else {  
             $subPageCss2Str .= "[首頁] ";  
             $subPageCss2Str .= "[上一頁] ";  
         }  

        $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'>下一頁</a>] ";  
             $subPageCss2Str .= "[<a href='$lastPageUrl'>尾頁</a>] ";  
         } else {  
             $subPageCss2Str .= "[下一頁] ";  
             $subPageCss2Str .= "[尾頁] ";  
         }  
         return $subPageCss2Str;  
     }  
 }  


//測試一下，看看兩種不同效果  

$current_page=isset($_GET['page'])?intval($_GET['page']):1;//獲取用戶GET提交的page，如果沒有就默  
 $t = new Page(10, 100, $current_page, 5);  
 echo $t->subPageCss2();  
 echo "<br>";  
 echo $t->subPageCss1();  
 ?>  </pre>