PHP backend method to implement paging subscript generation code for web pages

This article mainly introduces the PHP back-end method to realize the paging subscript generation code of web pages. It has a certain reference value. Now I share it with you. Friends in need can refer to

Pagination of web pages. The selection effect directly affects the user experience. There are many methods with similar functions. The main advantage of the method I write here is that the front and back ends are separated, and you can define the length and number of paging lines by yourself

Test legend:

Rendering:

Implementation code:

 /**
   *
   * @param $page   页码（1至正无穷）
   * @param $num   数据中多上行为一页
   * @param $rows   数据的总行数
   * @param $length  下标的最大长度
   * @return array
   */
  public function PageDate($page, $num , $rows , $length){
    //初始化数据
    $MaxPage = 0;         //最大页码
    $MinPage = 0;         //最小页码
    $ServerPage = 0;        //下拉框中显示的页码
    $PageData = array();      //全部的页码集合（用户下拉框选择）
    $PageShowData = array();    //用于显示下标的页码集合
    $page = intval($page);
 
    if($rows == 0){
      return $data = array(
        'page' => $page,
        'MaxPage' => $MaxPage,
        'MinPage' => $MinPage,
        'ServerPage' => $ServerPage,
        'PageData' => $PageData,
        'PageShowData' => $PageShowData
      );
    }
 
    //得到最大分页和最小分页
    $MaxPage = intval($rows / $num);
    $double = $rows % $num;
    if($double > 0.000000001)
    {
      $MaxPage += 1;
    }
    $MinPage = 1;
    $ServerPage = 1;
    //得到页码的全部项目
    for($i = 1; $i <= $MaxPage; $i++ ){
      $PageData[$i] = $i;
    }
    //对页码进行正确性改正
    if($page < $MinPage){
      $page = 1;
    }
 
    if($page > $MaxPage){
      $page = 1;
    }
    /*生成显示的页码标签*/
      //生成左侧的代码快
      if($page == $MinPage){
        $PageShowData[1] = $page;
      }
      if($page > $MinPage){
        $PageShowData[1] = $MinPage;
//        $PageShowData[2] = $page - 1; // <<
        $PageShowData[2] = '<<'; // <<
        if($page -2 > $MinPage ){
          $PageShowData[3] = $page - 2;
          $PageShowData[4] = $page - 1;
        }elseif($page -2 == $MinPage){
          $PageShowData[3] = $page - 1;
        }
        //确定选中的页码代码快
        $PageShowData[count($PageShowData) + 1] = $page;
      }
    $COUNT = count($PageShowData) + 1;
    //生成右侧的代码块
      if($page == $MaxPage){
        return $data = array(
          'page' => $page,
          'MaxPage' => $MaxPage,
          'MinPage' => $MinPage,
          'ServerPage' => $ServerPage,
          'PageData' => $PageData,
          'PageShowData' => $PageShowData
        );
      }
      if($page < $MaxPage) {
        if($MaxPage - $page >= 2){
          $j = 1;
          for($i = $COUNT; $i <= $length ; $i++){
            $PageShowData[$i] = $page + $j;
            $j ++;
            if($PageShowData[$i] == $MaxPage -1){
                 break;
              }
          }
        }
 
        $COUNT = count($PageShowData) + 1;
//        $PageShowData[$COUNT] = $page + 1; //>>
        $PageShowData[$COUNT] = '>>';
        $PageShowData[$COUNT + 1] = $MaxPage;
 
        //得到选中的参数
        $ServerPage = $PageShowData[$COUNT-1] + 1;
        if($ServerPage > $MaxPage){
          $ServerPage = 1;
        }
 
        return $data = array(
          'page' => $page,
          'MaxPage' => $MaxPage,
          'MinPage' => $MinPage,
          'ServerPage' => $ServerPage,
          'PageData' => $PageData,
          'PageShowData' => $PageShowData
        );
      }
  }

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