<?php
  //分頁(yè)工具類
  class Page{
    /*
     * 獲取分頁(yè)字符串
     * @param1 string $uri，分頁(yè)要請(qǐng)求的腳本url
     * @param3 int $counts，總記錄數(shù)
     * @param4 int $length，每頁(yè)顯示的記錄數(shù)
     * @param5 int $page = 1，當(dāng)前頁(yè)碼
     * @return string，帶有a標(biāo)簽的，可以點(diǎn)擊發(fā)起請(qǐng)求的字符串
    */
    public static function getPageStr($uri,$counts,$length,$page = 1){
      //構(gòu)造一個(gè)能夠點(diǎn)擊的字符串
      //得到數(shù)據(jù)顯示的字符串
      $pagecount = ceil($counts/$length);        //總頁(yè)數(shù)
      $str_info = "當(dāng)前一共有{$counts}條記錄，每頁(yè)顯示{$length}條記錄，一共{$pagecount}頁(yè)，當(dāng)前是第{$page}頁(yè)";
      //生成可以操作的連接：首頁(yè) 上一頁(yè) 下一頁(yè) 末頁(yè)
      //求出上一頁(yè)和下一頁(yè)頁(yè)碼
      $prev = ($page <= 1) ? 1 : $page - 1;
      $next = ($page >= $pagecount) ? $pagecount : $page + 1;
      $str_click = <<<END
        <a href="{$uri}?page=1">首頁(yè)</a>
        <a href="{$uri}?page={$prev}">上一頁(yè)</a>
        <a href="{$uri}?page={$next}">下一頁(yè)</a>
        <a href="{$uri}?page={$pagecount}">末頁(yè)</a>
END;
      //按照頁(yè)碼分頁(yè)字符串
      $str_number = '';
      for($i = 1;$i <= $pagecount;$i++){
        $str_number .= "<a href='{$uri}?page={$i}'>{$i}</a>&nbsp;";
      }
      //下拉框分頁(yè)字符串：利用js的onchang事件來改變當(dāng)前腳本的href
      $str_select = "<select onchange=\"location.href='{$uri}?page='+this.value\">";
      //將所有的頁(yè)碼放入到option
      for($i = 1;$i <= $pagecount;$i++){
        if($i == $page)
          $str_select .= "<option value='{$i}' selected='selected'>{$i}</option>";
        else
          $str_select .= "<option value='{$i}'>{$i}</option>";
      }
      $str_select .= "</select>";
      //返回值
      return $str_info . $str_click . $str_number . $str_select;
    }
}