Transformation of ThinkPHP paging function_PHP tutorial

 1 function mypage($tot,$length){
 2     $page=$_GET['p']?$_GET['p']:1;
 3     $offset=($page-1)*$length;
 4     $prevpage=$page-1;
 5 
 6     $pages=ceil($tot/$length);
 7 
 8     if($page>=$pages){
 9         $nextpage=$pages;
10     }else{
11         $nextpage=$page+1;
12     }
13 
14     $limit="{$offset},{$length}";
15 
16     $show="
17     <h4>
18         <a href=&#39;__SELF__/p/1&#39;class=&#39;btn btn-warning btn-sm&#39;>首页</a>
19         <a href=&#39;__SELF__/p/{$prevpage}&#39; class=&#39;btn btn-warning btn-sm&#39;>上一页</a>  
20         <span>{$page}/{$pages}</span>
21         <a href=&#39;__SELF__/p/{$nextpage}&#39; class=&#39;btn btn-warning btn-sm&#39;>下一页</a>
22         <a href=&#39;__SELF__/p/{$pages}&#39; class=&#39;btn btn-warning btn-sm&#39;>末页</a>
23     </h4>";
24     C(&#39;limit&#39;,$limit);
25     C(&#39;show&#39;,$show);
26 }

1         $goods=M('Goods');
2         $count=$goods->where('is_pass=1 and is_self=1')->count();
3         mypage($count,5);
4         $this->rows=$goods->where('is_pass=1 and is_self=1')->limit(C('limit'))->order('trade_num desc,price asc')->select();
5         $this->assign('show',C('show'));
6         $this->display();