How to use PHP to implement the e-book reading function of WeChat applet?

How to use PHP to implement the e-book reading function of WeChat applet?

With the rapid development of mobile Internet, e-book reading has become one of the important ways for people to obtain knowledge. As a lightweight application, WeChat applet has also begun to play an important role in mobile applications. This article will introduce how to use PHP to implement the e-book reading function of WeChat applet and give specific code examples.

First of all, we need to understand the basic architecture and development specifications of WeChat applet. The WeChat applet adopts a development model with front-end and back-end separation. The front-end uses WXML and WXSS for page layout and style definition, and the back-end uses PHP for data processing.

1. Create database and table structure

First, we need to create a database to store e-book related information. Assume that our database is named "ebook" and create a table named "books" to store e-book information, including book title, author, cover image, book path and other fields.

2. Write PHP back-end interface

1. Create a PHP file named "getBooks.php" to obtain the e-book list information in the database.

<?php
// 连接数据库
$conn = new mysqli('localhost', 'root', 'password', 'ebook');
if ($conn->connect_errno) {
    die('数据库连接错误');
}

// 查询数据库中的电子书列表
$result = $conn->query("SELECT * FROM books");
if ($result->num_rows > 0) {
    $books = array();
    while ($row = $result->fetch_assoc()) {
        $books[] = array(
            'id' => $row['id'],
            'title' => $row['title'],
            'author' => $row['author'],
            'cover' => $row['cover']
        );
    }
    echo json_encode($books);
} else {
    echo '暂无电子书';
}

// 关闭数据库连接
$conn->close();
?>

2. Create a PHP file named "getBookContent.php" to obtain the content of the e-book based on its ID.

<?php
// 连接数据库
$conn = new mysqli('localhost', 'root', 'password', 'ebook');
if ($conn->connect_errno) {
    die('数据库连接错误');
}

// 获取电子书ID
$bookId = $_GET['bookId'];

// 查询数据库中指定ID的电子书内容
$result = $conn->query("SELECT * FROM books WHERE id = $bookId");
if ($result->num_rows > 0) {
    $book = $result->fetch_assoc();
    $bookPath = $book['path'];
    $content = file_get_contents($bookPath);
    echo $content;
} else {
    echo '电子书不存在';
}

// 关闭数据库连接
$conn->close();
?>

3. Write the front-end code for the WeChat mini program

1. Create a project named "ebook" in the WeChat mini program development tool and modify the app.json file. Add the "permission" field to allow access to HTTPS domain names.

{
  "pages": [
    "pages/index/index",
    "pages/book/book"
  ],
  "permission": {
    "scope.userLocation": {
      "desc": "你的位置信息将用于小程序展示"
    }
  }
}

2. Create a homepage page, the index/index.wxml file, to display the e-book list.

<view>
  <block wx:for="{{books}}" wx:key="id">
    <view class="book-item" bindtap="openBook">
      <image src="{{item.cover}}" class="cover" />
      <text class="title">{{item.title}}</text>
      <text class="author">{{item.author}}</text>
    </view>
  </block>
</view>

3. Create the style file index/index.wxss corresponding to the home page.

.book-item {
  margin: 10px;
  padding: 10px;
  border: 1px solid #ccc;
}

.cover {
  width: 100px;
  height: 150px;
}

.title {
  font-size: 16px;
  margin-top: 5px;
}

.author {
  color: #999;
  font-size: 14px;
  margin-top: 2px;
}

4. Create the JavaScript file index/index.js corresponding to the home page to obtain e-book list data.

// 获取电子书列表数据
function getBooks() {
  wx.request({
    url: 'https://yourdomain.com/getBooks.php',
    success: function(res) {
      if (res.statusCode === 200) {
        // 更新页面数据
        that.setData({
          books: res.data
        });
      }
    },
    fail: function() {
      wx.showToast({
        title: '获取电子书数据失败',
        icon: 'none'
      });
    }
  });
}

Page({
  data: {
    books: []
  },
  
  onLoad: function() {
    // 获取电子书列表数据
    getBooks();
  },
  
  openBook: function(e) {
    // 跳转到电子书阅读页面，并传递电子书ID
    wx.navigateTo({
      url: '/pages/book/book?id=' + e.currentTarget.dataset.id
    });
  }
});

5. Create an e-book reading page, the book/book.wxml file, to display e-book content.

<view class="content">{{content}}</view>

6. Create the style file book/book.wxss corresponding to the e-book reading page.

.content {
  margin: 10px;
  padding: 10px;
  font-size: 16px;
  line-height: 1.8;
  text-indent: 20px;
  text-align: justify;
}

7. Create the JavaScript file book/book.js corresponding to the e-book reading page to obtain the e-book content.

// 获取电子书内容
function getBookContent(id) {
  wx.request({
    url: 'https://yourdomain.com/getBookContent.php?bookId=' + id,
    success: function(res) {
      if (res.statusCode === 200) {
        // 更新页面数据
        that.setData({
          content: res.data
        });
      }
    },
    fail: function() {
      wx.showToast({
        title: '获取电子书内容失败',
        icon: 'none'
      });
    }
  });
}

Page({
  data: {
    content: ''
  },
  
  onLoad: function(options) {
    // 获取电子书ID
    var bookId = options.id;
    // 获取电子书内容
    getBookContent(bookId);
  }
});

The above is the specific code implementation of using PHP to implement the e-book reading function of the WeChat applet. By creating a database and table structure, writing a PHP back-end interface, and writing a WeChat applet front-end code, we can implement a simple e-book reading applet. This is just a basic example, and it needs to be expanded and optimized according to actual needs in actual development. I hope this article can be helpful in using PHP to implement the e-book reading function of WeChat applet.

The above is the detailed content of How to use PHP to implement the e-book reading function of WeChat applet?. For more information, please follow other related articles on the PHP Chinese website!