PHP implements comment and reply skills in WeChat applet

With the popularity of WeChat mini programs, more and more developers are beginning to pay attention to how to implement the comment and reply functions in mini programs. This article will introduce how to use PHP language to implement the comment and reply functions in WeChat applet.

1. Comment and reply functions of WeChat Mini Program

As a lightweight application, WeChat Mini Program provides users with rich information services and social functions. Among them, comments and replies are a very important part of user interaction. The comment and reply functions in the mini program not only allow users to communicate with each other, but also provide more content and interaction for the mini program.

The comment and reply functions in the WeChat mini program mainly include the following two parts:

1. Comments: Users can comment on the content in the mini program for other users to view and review reply.
2. Reply: Users can reply to other users' comments in the comment area to communicate and discuss with each other.

2. Use PHP to implement the comment and reply functions of the WeChat applet

In order to implement the comment and reply functions of the WeChat applet, we need to use PHP language for development. Specific steps As follows:

1. Create database

First, we need to create a MySQL database to store comment and reply data. Databases can be created using phpMyAdmin and similar tools.

Create two tables in the database: comments and replies. Among them, the comments table is used to store comment data, including comment number, user nickname, comment content, comment time, etc.; the replies table is used to store reply data, including reply number, comment number, replying user nickname, replied user nickname, and reply content. , response time, etc.

2. Write PHP code

Next, we need to write PHP code to complete the comment and reply functions. Specifically divided into the following steps:

(1) Connect to the database

Use PHP’s mysqli library to connect to the MySQL database, the code is as follows:

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
$conn = mysqli_connect($servername, $username, $password, $dbname);
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

(2) Add a comment

Insert the user's comment data into the comments table, the code is as follows:

$sql = "INSERT INTO comments (username, content, time)
VALUES ('$username', '$content', '$time')";
if (mysqli_query($conn, $sql)) {
    echo "New comment created successfully";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

(3) Get the comment list

Get all comment data from the comments table, and press Sort in reverse order of time, the code is as follows:

$sql = "SELECT * FROM comments ORDER BY time DESC";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        // 输出评论信息
    }
} else {
    echo "No comments yet";
}

(4) Add reply

Insert the user's reply data into the replies table, the code is as follows:

$sql = "INSERT INTO replies (comment_id, username, replyto, content, time)
VALUES ('$comment_id', '$username', '$replyto', '$content', '$time')";
if (mysqli_query($conn, $sql)) {
    echo "New reply created successfully";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

(5) Get Reply list

Get all the reply data of the comments from the replies table and sort them in chronological order. The code is as follows:

$sql = "SELECT * FROM replies WHERE comment_id='$comment_id' ORDER BY time ASC";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        // 输出回复信息
    }
} else {
    echo "No replies yet";
}

The above are the steps to use PHP to implement the comment and reply functions of the WeChat applet.

3. Summary

The comment and reply functions of the WeChat mini program are an essential part of the mini program, providing users with rich communication and content-rich services. This article introduces how to use PHP language to implement the comment and reply functions of WeChat applet. I hope it will be helpful to developers.

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