Complete example of page paging class encapsulated by php

<?php
  //Pagination tool class  class Page{
    /*
      * Get the pagination string
      * @param1 string $uri, the script url to be requested by pagination
      * @param3 int $counts, total number of records
      * @param4 int $length, the number of records displayed per page
      * @param5 int $page = 1, current page number
      * @return string, with a tag, you can click the string to initiate the request
     */
    public static function getPageStr($uri,$counts,$length,$page = 1){
      //Construct a clickable string      //Get the string displayed by the data      $pagecount = ceil($counts/$length);        //Total page count      $str_info = "There are currently a total of{$counts}Record，Displayed per page{$length}Record，Total{$pagecount}Page，Currently the first{$page}Page";
      //Generate operationable connection: Home Previous Page Next Page Last Page      //Check the page numbers of the previous page and the next page      $prev = ($page <= 1) ? 1 : $page - 1;
      $next = ($page >= $pagecount) ? $pagecount : $page + 1;
      $str_click = <<<END
        <a href="{$uri}?page=1">首Page</a>
        <a href="{$uri}?page={$prev}">上一Page</a>
        <a href="{$uri}?page={$next}">下一Page</a>
        <a href="{$uri}?page={$pagecount}">末Page</a>
END;
      //Page strings according to page number      $str_number = '';
      for($i = 1;$i <= $pagecount;$i++){
        $str_number .= "<a href='{$uri}?page={$i}'>{$i}</a> ";
      }
      //Page string of drop-down box: use js onchang event to change the href of the current script      $str_select = "<select onchange=\"='{$uri}?page='+\">";
      //Put all page numbers into 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>";
      //Return value      return $str_info . $str_click . $str_number . $str_select;
    }
}