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仿PHP中文网分页
秋闲独醉
Original
580 people have browsed it

index.php

  1. <?php
  2. namespace _0819;
  4. use PDO;
  6. // 连接数据库
  7. $db = new PDO('mysql:dbname=phpedu;port=3308', 'user', '123456');
  9. //获取url的页码
  10. $page = $_GET['p'] ?? 1;
  11. //每页显示的记录数
  12. $num = 5;
  13. //当前页的起始记录数
  14. $offset = ($page - 1) * $num;
  15. //计算总记录数
  16. $sql = 'SELECT COUNT(*) AS `total` FROM `staff`';
  17. $stmt = $db->prepare($sql);
  18. $stmt->execute();
  19. // 将总数量绑定到一个变量上
  20. $stmt->bindColumn('total', $total);
  21. $stmt->fetch();
  22. // 向上取整总页数
  23. $pages = ceil($total / $num);
  24. //包含分页接口Page
  25. include 'Page.php';
  26. //调用Page接口的静态方法clickPage();
  27. $arr = \_0819\Page::clickPage('http://www.test.io/作业/PHP编程/0819/index.php',$page,$pages);
  29. $sql = <<< SQL
  30.     SELECT *
  31.     FROM `staff`
  32.     LIMIT $offset, $num;
  33. SQL;
  35. $stmt = $db->prepare($sql);
  36. $stmt->execute();
  37. $staffs = $stmt->fetchAll(PDO::FETCH_ASSOC);
  39. if (count($staffs) === 0) {
  40.     echo '查询结果为空';
  41. }
  42. ?>
  44. <!DOCTYPE html>
  45. <html lang="zh-CN">
  47. <head>
  48.     <meta charset="UTF-8">
  49.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  50.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  51.     <title>分页展示数据</title>
  52.     <style>
  53.     table {
  54.         width: 400px;
  55.         border-collapse: collapse;
  56.         text-align: center;
  57.         margin: auto;
  59.     }
  61.     table th,
  62.     table td {
  63.         border: 1px solid;
  64.         padding: 5px;
  65.     }
  67.     table thead {
  68.         background-color: lightcyan;
  69.     }
  71.     table caption {
  72.         font-size: larger;
  73.         margin-bottom: 8px;
  74.     }
  76.     body>p {
  77.         display: flex;
  78.         place-content: center;
  79.         margin: auto;
  80.     }
  82.     p>a {
  83.         text-decoration: none;
  84.         color: #555;
  85.         border: 1px solid;
  86.         padding: 5px 10px;
  87.         margin: 10px 2px;
  88.     }
  90.     .active {
  91.         background-color: seagreen;
  92.         color: white;
  93.         border: 1px solid seagreen;
  94.     }
  95.     </style>
  96. </head>
  98. <body>
  99.     <table>
  100.         <caption>员工信息表</caption>
  101.         <thead>
  102.             <tr>
  103.                 <th>ID</th>
  104.                 <th>姓名</th>
  105.                 <th>性别</th>
  106.                 <th>邮箱</th>
  107.             </tr>
  108.         </thead>
  109.         <tbody>
  110.             <?php foreach ($staffs as $staff) :extract($staff) ?>
  111.             <tr>
  112.                 <td><?=$id?>
  113.                 </td>
  114.                 <td><?=$name?>
  115.                 </td>
  116.                 <td><?=$sex?>
  117.                 </td>
  118.                 <td><?=$email?>
  119.                 </td>
  120.             </tr>
  121.             <?php endforeach ?>
  122.         </tbody>
  123.     </table>
  124.     <p>
  125.         <?php
  126.     echo $arr;
  127.     ?>
  128.     </p>
  129. </body>
  131. </html>

分页接口

  1. <?php
  2. namespace _0819;
  3. //分页功能类
  4. class Page
  5. {
  6.     /**
  7.      * 分页功能：仿PHP中文网分页
  8.      * @param string $url 基本链接（'http://www.test.io/测试/demo.php')
  9.      * @param int $page = 1，当前页码，默认第1页
  10.      * @param int $pages 总页数。
  11.      * @return string
  12.      */
  14.     public  static function clickPage(string $url,int $page = 1,int $pages):string
  15.     {
  16.         //通过总页娄生成数组
  17.         $pageArr = range(1,$pages);
  18.         //首尾页数必须显示，当前页和前后两页显示
  19.         $pageDisplay = array_map(function($p) use($page,$pages){
  20.             //把其他不显示的元素置为null
  21.             return ($p === 1 || $p === $pages || abs($page-$p) <= 2)? $p : null;
  22.         },$pageArr);
  23.         //以当前页为分界线，各自只保留一个null,
  24.         $before = array_unique(array_slice($pageDisplay,0,$page));
  25.         $after = array_unique(array_slice($pageDisplay,$page));
  26.         //合并前后两个数组
  27.         $pageArr = array_merge($before,$after);
  28.         //判断上一页的值
  29.         $prePage = ($page - 1) >1 ?($page - 1): 1;
  30.         //判断下一页的值
  31.         $nextPage = ($page + 1) < $pages ? ($page + 1): $pages;
  32.         //并接上一页的html代码
  33.         $preUrl = $url.'?p='.$prePage;
  34.         $str = <<< Str
  35.         <a href="$preUrl" >上一页</a>
  36. Str;
  37.         //以数组的值来判断是否显示。
  38.         //如果是当前页就给颜色
  39.         for($i = 0; $i < count($pageArr);$i++){
  40.             $active = "";
  41.             if($pageArr[$i]){
  42.                 if($page === $pageArr[$i]){
  43.                     $active = "active";
  44.                 }
  45.                 $currentUrl = $url.'?p='.$pageArr[$i];
  46.                 $str .="<a href=$currentUrl class=$active >$pageArr[$i]</a>";
  48.             }else{
  49.                 $str .="<a>...</a>";
  50.             }
  51.         }
  52.         //并接上一页的html代码
  53.         $nextUrl = $url.'?p='.$nextPage;
  54.         $str .= <<< Str
  55.         <a href="$nextUrl" >下一页</a>
  56. Str;
  57.         return $str;
  59.     }
  60. }
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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