How to use PHP to develop the medical consultation function of WeChat applet?

How to use PHP to develop the medical consultation function of WeChat applet?

With the popularity of WeChat mini programs and the continuous expansion of application fields, many medical institutions have also begun to pay attention to and use WeChat mini programs to provide medical consultation services. In this article, we will use PHP language to develop a simple WeChat applet with medical consultation function.

1. Preparation

1. Register a WeChat developer account and create a mini program application.
2. Configure the basic information of the mini program, including the mini program's AppID, AppSecret, etc.
3. Install the PHP development environment, including PHP, MySQL, etc.

2. Database design
We need to establish a database table to store user consultation questions and doctor responses. Create a database named consultation, containing the following two tables:

1. users: a table used to store user information, containing the following fields:

   • id : User ID
   • openid: The user’s unique identifier in the mini program
   • nickname: User nickname
   • avatar: User avatar

2. consultations: A table used to store user consultations and doctor responses, containing the following fields:

   • id: record ID
   • user_id: user ID
   • question: Question asked by the user
   • reply: What the doctor replied
   • create_time: Creation time
   • update_time: Update time

3. Back-end development

1. Obtain user information
   In the mini program, we need to obtain the user's openid and other information, which can be achieved using the API provided by WeChat. We can write an interface for verification on the back end, and obtain the user's openid through the code, AppID, and AppSecret passed by the front end of the mini program.
2. Interface for user consultation and doctor reply recording
   We need to implement two interfaces: one for users to consult and the other for doctors to reply.

For user consultation, we can create an interface using POST requests, receive the questions asked by the user and the user's openid, store the questions in the consultations table, and return the corresponding status code and prompt information .

For the doctor's reply, you can create another interface that uses POST requests to receive the doctor's reply content and the record ID of the consultation, update the reply content to the consultations table, and return the corresponding status code and prompt information.

3. Data statistics interface
   We can create an interface for counting the number of consultation questions and the number of responses. This interface will query the consultations table and return the corresponding data.

4. Front-end development

1. Login authorization process
   In the mini program, we need to obtain the user's openid for subsequent operations. We can use wx.login to obtain the user's temporary login credential code, and pass the code to the backend interface to request the user's openid.
2. User consultation interface
   In the user consultation interface, we can provide an input box for users to enter questions. When the submit button is clicked, the user questions and openid are passed to the back-end interface for saving.
3. Doctor reply interface
   In the doctor reply interface, we can display the questions asked by the user and provide an input box for the doctor to reply. When the submit button is clicked, the reply content and the ID of the consultation record are passed to the backend interface for update.
4. Data statistics interface
   In the data statistics interface, we can display the number of consultation questions and the number of responses.

5. Code Example
The following is a simple PHP code example:

<?php
  
  // 获取用户openid
  function getUserOpenid($code, $appid, $appsecret) {
    $url = "https://api.weixin.qq.com/sns/jscode2session?appid=".$appid."&secret=".$appsecret."&js_code=".$code."&grant_type=authorization_code";
    $result = file_get_contents($url);
    $data = json_decode($result, true);
    return $data['openid'];
  }
  
  // 用户咨询接口
  function userConsult($question, $openid) {
    // 连接数据库并插入数据
    $conn = new mysqli("localhost", "username", "password", "consultation");
    if ($conn->connect_error) {
      die("Connection failed: " . $conn->connect_error);
    }
  
    $sql = "INSERT INTO consultations (user_id, question) VALUES ('$openid', '$question')";
    if ($conn->query($sql) === TRUE) {
      echo "Consultation saved successfully";
    } else {
      echo "Error: " . $sql . "<br>" . $conn->error;
    }
  
    $conn->close();
  }
  
  // 医生回复接口
  function doctorReply($reply, $record_id) {
    // 连接数据库并更新数据
    $conn = new mysqli("localhost", "username", "password", "consultation");
    if ($conn->connect_error) {
      die("Connection failed: " . $conn->connect_error);
    }
  
    $sql = "UPDATE consultations SET reply='$reply' WHERE id='$record_id'";
    if ($conn->query($sql) === TRUE) {
      echo "Reply saved successfully";
    } else {
      echo "Error: " . $sql . "<br>" . $conn->error;
    }
  
    $conn->close();
  }
  
?>

The above code is only an example. In actual development, parameter verification and security protection are also required. Wait for related processing.

6. Summary
This article introduces how to use PHP to develop the medical consultation function of WeChat applet. Through steps such as preparation work, database design, back-end development, and front-end development, we can realize the functions of user consultation questions and doctor response records, and provide a data statistics interface. Of course, in actual projects, factors such as security and performance optimization also need to be considered, and functional expansion and optimization should be carried out according to specific needs. I hope this article can provide you with some help when developing the medical consultation function of the WeChat mini program!

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