How PHP uses the Mysqli class library to achieve perfect paging effects, mysqli class library

The example in this article describes how PHP uses the Mysqli class library to achieve perfect paging effects. Share it with everyone for your reference, the details are as follows:

This article is tailor-made based on my previous article "PHP Database Operation: Database Operation Class Library Based on Mysqli". How to use the FetchAll method in the M class library to create perfect paging.

Pagination is essential in each of our projects, and it appears very frequently. This requires our programmers to implement the paging solution with the fastest speed and the most concise code in the project.

The implementation of paging is mostly based on the parameters passed in the URL (usually page), for example: http://localhost/article.php?page=2 means to get the second page data

Recommendation: When you read this article, please make sure you have studied my last article "PHP Database Operation: Database Operation Class Library Based on Mysqli"

Below we will explain the paging based on the M class library. The code that appears in the blog post is finally accompanied by a download address, including the test database file.

1. Create the configuration file config.inc.php

The code list is as follows

<&#63;php
header('Content-Type:text/html;Charset=utf-8'); //設置header編碼
define('ROOT_PATH', dirname(__FILE__)); //設置根目錄
define('DB_HOST', 'localhost'); //數據庫服務器地址
define('DB_USER', 'root'); //數據庫用戶名
define('DB_PWD', '×××');//數據庫密碼，請根據機器填寫
define('DB_NAME', '×××'); //數據庫名稱，請根據機器填寫
define('DB_PORT', '3306'); //數據庫端口，請根據機器填寫
function __autoload($className) {
  require_once ROOT_PATH . '/includes/'. ucfirst($className) .'.class.php'; //自動加載類庫文件
}
&#63;>

2. Create information test file article.php

Note: Due to my limited CSS ability, in order to demonstrate the function, I only used simple HTML
The code list and comments are as follows

<&#63;php
require 'config.inc.php'; //引入配置文件
$m = new M(); //實例化 M 類
$total = $m->Total('jzy_article'); //資訊文章總數
$page = new Page($total, 20); //實例化分頁類
/*
注意事項：
1、實例分頁 Page 類的時候，需要傳兩個參數：記錄總數；每頁顯示的記錄數。
2、當傳入參數后，Page 類中有個setLimit()方法會自動計算出 SQL 中的 limit 值。比如：URL 參數中 page 為1的時候，limit 值為“0,20”；為2的時候，limit 值為“20,20”……
3、計算出來的 $page->limit，必須放在 FetchAll 方法中的最后一位，詳情請查看 FetchAll 方法
*/
$data = $m->FetchAll("jzy_article", "title, source, writer, pubdate", "", "id DESC", $page->limit); //根據 M 類庫中的 FetchAll 方法獲取數據
&#63;>
<style>
/* 分頁樣式 */
#page {text-align:right;  padding:10px;clear:both;}#page a {border:1px solid #666;padding:2px 5px;margin:0 2px;color:#3b6ea5;text-decoration:none;}#page a:hover,#page span.me {color:#fff;border:1px solid #000;background:#000;text-decoration:none;}#page span.disabled {border:1px solid #ccc;padding:2px 5px;margin:0 2px;color:#ccc;}#page span.me {padding:2px 5px;margin:0 2px;}
</style>
<table width="1000" border="1" style="border-collapse:collapse; font-size:13px;">
<tr height="30">
  <th width="483">標題</th>
  <th width="141">來源</th>
  <th width="154">作者</th>
  <th width="194">添加時間</th>
</tr>
<&#63;php
foreach ($data as $v) { //循環(huán)取出數據
&#63;>
<tr>
  <td> <&#63;php echo $v['title']; &#63;></td>
  <td align="center"><&#63;php echo $v['source']; &#63;></td>
  <td align="center"><&#63;php echo $v['writer']; &#63;></td>
  <td align="center"><&#63;php echo $v['pubdate']; &#63;></td>
</tr>
<&#63;php
}
&#63;>
<tr>
  <td id="page" colspan="4"><&#63;php echo $page->fpage(); &#63;></td> <!-- 調出分頁類 -->
</tr>
</table>

3. Access test effect

Open the browser and enter the test URL address. Your browser should have the following effect

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I hope this article will be helpful to everyone in PHP programming.

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