How to use PHP to develop site messaging and broadcast modules in CMS

CMS (Content Management System) provides rich functionality to help us create, edit, publish and maintain content on our website. One of these is the in-site messaging and broadcast modules, which allow us to send messages and notifications to website users, improving user experience and increasing website interactivity. This article will introduce how to use PHP to develop in-site messaging and broadcast modules in CMS.

1. Preparation

First, we need a CMS system as a development and testing environment. In this article, we will use WordPress as an example CMS system. In addition, we need some basic PHP programming knowledge and MySQL database knowledge. Because CMS systems usually use MySQL database to store user and content data.

2. Design database tables

We will use two database tables to store intra-site messages and broadcast messages. Create two database tables: messages and broadcasts. Each table has its own columns, as follows:

messages table:

id: message ID, self-increasing integer type
sender: message sender, integer type, pointing to ID column in the user table
receiver: message receiver, integer type, pointing to the ID column in the user table
subject: message subject, string type
message: message body, string type
status: message status, string type, can be "read" or "unread"
timestamp: message timestamp, time/date type, record message creation time

broadcasts table:

id: Broadcast message ID, self-increasing integer type
sender: Broadcast message sender, integer type, pointing to the ID column in the user table
subject: Broadcast message subject, string type
message: Broadcast message text, string type
timestamp: Broadcast message timestamp, time/date type, record broadcast message creation time

3. Create PHP function

Once we With the database table in place, we can start writing PHP code to implement the functions of in-site messages and broadcast messages. The following are some basic ideas for functional implementation:

Send a message: When the user fills out and submits an on-site message form, the form data is inserted into the messages table.

View messages: After users log in, they can view and read their site messages. We need to run a MySQL query to retrieve all site messages related to the user.

Mark message as read: After the user reads an unread message, we need to update the status of the message to "read".

Send broadcast messages: Administrators can fill in and submit the broadcast message form and insert broadcast message data into the broadcasts table.

View broadcast messages: Users can view and read broadcast messages on the website, we need to run a MySQL query to retrieve all broadcast messages.

The following are some basic PHP functions that can be used as the basis for CMS site messaging and broadcast modules.

a. Insert the site message into the database table:

function insert_message($sender, $receiver, $subject, $message) {
  global $wpdb;
  $table_name = $wpdb->prefix . "messages";
  $data = array(
    'sender' => $sender,
    'receiver' => $receiver,
    'subject' => $subject,
    'message' => $message,
    'status' => '未读',
    'timestamp' => current_time('mysql')
  );
  $wpdb->insert($table_name, $data);
}

b. Retrieve the message:

function get_messages($user_id) {
  global $wpdb;
  $table_name = $wpdb->prefix . "messages";
  $sql = $wpdb->prepare("SELECT * FROM $table_name WHERE receiver = %d ORDER BY timestamp DESC", $user_id);
  $results = $wpdb->get_results($sql);
  return $results;
}

c. Mark the message as read:

function mark_message_read($message_id) {
  global $wpdb;
  $table_name = $wpdb->prefix . "messages";
  $data = array('status' => '已读');
  $where = array('id' => $message_id);
  $wpdb->update($table_name, $data, $where);
}

d. Insert the broadcast message into the database table:

function insert_broadcast($sender, $subject, $message) {
  global $wpdb;
  $table_name = $wpdb->prefix . "broadcasts";
  $data = array(
    'sender' => $sender,
    'subject' => $subject,
    'message' => $message,
    'timestamp' => current_time('mysql')
  );
  $wpdb->insert($table_name, $data);
}

e. Retrieve the broadcast message:

function get_broadcasts() {
  global $wpdb;
  $table_name = $wpdb->prefix . "broadcasts";
  $sql = "SELECT * FROM $table_name ORDER BY timestamp DESC";
  $results = $wpdb->get_results($sql);
  return $results;
}

4. Create the site message and broadcast form

Finally, we Forms need to be created in the CMS system so that users can send site messages and administrators can send broadcast messages. Below is some basic form code that can be placed on a page in a CMS system.

In-site message form:

<form method="post" action="[发送站内信的PHP处理文件路径]">
  <label>收件人：</label>
  <input type="text" name="receiver"/>
  <br />
  <label>主题：</label>
  <input type="text" name="subject"/>
  <br />
  <label>消息内容：</label>
  <textarea name="message"></textarea>
  <br />
  <input type="submit" value="发送"/>
</form>

Broadcast message form:

<form method="post" action="[发送广播消息的PHP处理文件路径]">
  <label>主题：</label>
  <input type="text" name="subject"/>
  <br />
  <label>消息内容：</label>
  <textarea name="message"></textarea>
  <br />
  <input type="submit" value="发送"/>
</form>

5. Conclusion

By using the above steps, we can quickly and effectively Completely implement CMS site messaging and broadcast modules. These modules not only improve website user experience, but also promote website interactivity. Of course, this is just a basic implementation and we can continue to optimize and improve it to meet our own needs.

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