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如何用php实现分页效果
权
Original
858 people have browsed it

在一个网站中，分页是很常见的,可是怎样才能实现分页呢，今天为大家实现一下分页的效果
首先我们写分页前要知道两个很重要的地方，一个是数据库查询方式，一个是分页计算公式
数据库查询方式 select from tableName limit num1,num2; 这是一个限定查询的语句，后面跟两个参数，num1为从第几个开始查找，num2为查找的信息的个数
从查询方式中 num1这个值怎么来呢， 这就用到分页的计算公式了， num1 = （当前页 - 1） 每页显示的条数

实现分页前我们先在数据库里面准备一个表，并且插入数据，这些都是必需的前提工作了 （直接拷贝到数据库运行就行）

  1. CREATE TABLE `test`  (
  2.   `id` int(11) NOT NULL AUTO_INCREMENT,
  3.   `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL,
  4.   `content` varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL,
  5.   PRIMARY KEY (`id`) USING BTREE
  6. ) ENGINE = MyISAM AUTO_INCREMENT = 19 CHARACTER SET = utf8 COLLATE = utf8_unicode_ci ROW_FORMAT = Dynamic;
  9. INSERT INTO `test` VALUES (1, '测试1', '睡大觉');
  10. INSERT INTO `test` VALUES (2, '测试1', '睡大觉');
  11. INSERT INTO `test` VALUES (3, '测试1', '睡大觉');
  12. INSERT INTO `test` VALUES (4, '测试1', '睡大觉');
  13. INSERT INTO `test` VALUES (5, '测试1', '睡大觉');
  14. INSERT INTO `test` VALUES (6, '测试1', '睡大觉');
  15. INSERT INTO `test` VALUES (7, 'qwea', '睡大觉');
  16. INSERT INTO `test` VALUES (8, 'zxcz', '睡大觉');
  17. INSERT INTO `test` VALUES (9, 'qwe', '睡大觉');
  18. INSERT INTO `test` VALUES (10, 'bcv', '睡大觉');
  19. INSERT INTO `test` VALUES (11, 'rtyu', '睡大觉');
  20. INSERT INTO `test` VALUES (12, 'xcvx', '睡大觉');
  21. INSERT INTO `test` VALUES (13, '456', '睡大觉');
  22. INSERT INTO `test` VALUES (14, 'eqwe456', '睡大觉');
  23. INSERT INTO `test` VALUES (15, 'asd2', '睡大觉');
  24. INSERT INTO `test` VALUES (16, '123', '睡大觉');
  25. INSERT INTO `test` VALUES (17, 'rcvxtyu', '睡大觉');
  26. INSERT INTO `test` VALUES (18, '2312asda', '睡大觉');
  1. <?php
  3. //创建一个分页数据查询的方法
  4. function getPageList($page,$pageSize){
  5.     // 创建连接
  6.     $conn = mysqli_connect('127.0.0.1', 'root', 'root', 'page');
  7.     $s = ($page - 1) * $pageSize;
  8.     $sql = "SELECT * FROM test LIMIT {$s},{$pageSize}";
  9.     $sql1 = "SELECT count(*) as count FROM test";
  10.     $result = mysqli_query($conn, $sql);
  11.     $result1 = mysqli_query($conn, $sql1);
  12.     $data['table_count'] = $result1->fetch_assoc()['count'];
  13.     $data['pageSize'] = $pageSize;
  14.     $data['data'] = [];
  15.     if ($result->num_rows > 0) {
  16.         while($row = $result->fetch_assoc()) {
  17.             $data['data'][] = $row;
  18.         }
  19.     }
  20.     mysqli_close($conn);
  21.     return $data;
  22. }
  24. //创建一个处理分页的方法（这里我只实现 首页，上一页，下一页，尾页）
  25. function getPage($data){
  26.     //首先我们要先处理参数
  27.     $get = $_GET;
  28.     $page = isset($get['page'])?$get['page']:1;
  30.     //将其他的参数拼接起来，不需要分页页数
  31.     unset($get['page']);
  32.     $url = http_build_query($get);
  33.     $url = $url?$url.'&':'?';
  35.     $end_page = ceil($data['table_count'] / $data['pageSize']);
  36.     $src = '';
  37.     //如果当前页数为1 那第一个跟首页不能点击
  38.     if($page == 1){
  39.         $src = "<a><span>首页</span></a> ";
  40.         $src .= "<a><span>上一个</span></a> ";
  41.     }else{
  42.         $src .= "<a href='?{$url}page=1'>首页</a> ";
  43.         $pages = $page - 1;
  44.         $src .= "<a href='?{$url}page={$pages}'>上一个</a> ";
  45.     }
  47.     //如果当前页是最后一页 那下一个跟尾页不能点击
  48.     if($page == $end_page){
  49.         $src .= "<a ><span>下一个</span></a> ";
  50.         $src .= "<a><span>尾页</span></a> ";
  51.     }else{
  52.         $pages = $page + 1;
  53.         $src .= "<a href='?{$url}page={$pages}'>下一个</a> ";
  54.         $src .= "<a href='?{$url}page={$end_page}'>尾页</a> ";
  55.     }
  56.     return $src;
  57. }
  60. $page = isset($_GET['page'])?$_GET['page']:1;
  61. $list = getPageList($page,5);
  62. $page = getPage($list);
  64. ?>
  66. <!doctype html>
  67. <html lang="en">
  68. <head>
  69.     <meta charset="UTF-8">
  70.     <meta name="viewport"
  71.           content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  72.     <meta http-equiv="X-UA-Compatible" content="ie=edge">
  73.     <title>Document</title>
  74. </head>
  75. <body>
  76.     <table>
  77.         <tr>
  78.             <th>id</th>
  79.             <th>name</th>
  80.         </tr>
  81.         <?php foreach($list['data']  as $v){  ?>
  82.             <tr>
  83.                 <td><?php echo $v['id']; ?></td>
  84.                 <td><?php echo $v['name']; ?></td>
  85.             </tr>
  86.         <?php } ?>
  88.     </table>
  89.     <?php echo $page; ?>
  90. </body>
  91. </html>
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1 comments
权 2021-09-23 15:52:10
太感谢博主
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