How to use PHP to implement message board function-PHP Tutorial-php.cn

How to use PHP to implement message board function

PHPz

Release： 2023-06-27 17:34:01

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With the development of the Internet, message boards, as a common method of communication, are widely used in various websites. In website development, how to use PHP to implement a simple message board function can help the website increase user interaction and improve the website experience. The following will introduce how to use PHP to implement the message board function.

1. Establish a database
Before using PHP to implement a message board, you need to create a database first. You can use related tools, such as phpMyAdmin, etc., to create a database named message_board, and create a data table named message in it to record message information. The relevant information of the data table is as follows:

message
id(int primary key auto_increment) Message ID
name(varchar(255)) Username
email(varchar(255)) User email
content(text) Message content
created_at(datetime) Message time

2. Write message board code
1. Create a file named message_board.php to display message information , and provide a form for adding messages.
The code is as follows:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>留言板</title>
</head>
<body>
<h2>留言板</h2>
<?php
//连接数据库
$host = 'localhost'; //数据库主机名
$user = 'root'; //数据库用户名
$password = '123456'; //数据库密码
$database = 'message_board'; //数据库名称
$port = '3306'; //数据库端口
$conn = mysqli_connect($host, $user, $password, $database, $port);

//查询留言信息
$sql = "SELECT * FROM message ORDER BY created_at DESC";
$result = mysqli_query($conn, $sql);

//遍历留言信息
if ($result && mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        echo "<p>{$row['name']}({$row['email']})：{$row['content']}</p>";
        echo "<p>留言时间：{$row['created_at']}</p>";
        echo "<hr>";
    }
} else {
    echo "<p>暂无留言信息！</p>";
}

//关闭数据库连接
mysqli_close($conn);
?>
<form action="add_message.php" method="post">
    <p>用户名：<input type="text" name="name"></p>
    <p>用户邮箱：<input type="email" name="email"></p>
    <p>留言内容：<textarea name="content"></textarea></p>
    <p><input type="submit" value="提交留言"></p>
</form>
</body>
</html>

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2. Create a file named add_message.php to insert the added message information into the database.
The code is as follows:

<?php
//获取表单数据
$name = $_POST['name'];
$email = $_POST['email'];
$content = $_POST['content'];

//连接数据库
$host = 'localhost'; //数据库主机名
$user = 'root'; //数据库用户名
$password = '123456'; //数据库密码
$database = 'message_board'; //数据库名称
$port = '3306'; //数据库端口
$conn = mysqli_connect($host, $user, $password, $database, $port);

//插入留言信息
$sql = "INSERT INTO message(name, email, content, created_at) VALUES ('$name', '$email', '$content', NOW())";
$result = mysqli_query($conn, $sql);

//返回留言板页面
header('Location: message_board.php');

//关闭数据库连接
mysqli_close($conn);
?>

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3. Run the message board program
Upload message_board.php, add_message.php and database connection information to the server, and then you can use the browser to access the message_board.php file , start using the message board function.

4. Optimize the message board code
The above code implements a simple message board function, but there are still some areas that need to be optimized:

Requires data input by the user Conduct security checks to avoid security issues such as SQL injection.
When there are sensitive words in the message information submitted by the user, the message content needs to be filtered to ensure the health and stability of the website content.
Add paging function to the message board page to facilitate browsing of large amounts of message information.
Add a search function to the message board page to facilitate users to find message information they are interested in.

In short, by using PHP language to implement the message board function, it can help the website increase user interaction and improve the website experience. Of course, relevant security checks and optimization work need to be done before use to ensure the stability and security of the website.

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