With the development of social networks, the private message function has become an essential feature of modern social networks. In ThinkPHP, it is not difficult to implement the private message function. This article will introduce how to use the ThinkPHP framework to implement the private message function.

1. Database design

In order to realize the private message function, you first need to design the database. We can create two tables, the users table and the messages table.

The users table contains the user's id, username, password and other information:

CREATE?TABLE?`users`?(
??`id`?int(11)?NOT?NULL?AUTO_INCREMENT,
??`username`?varchar(50)?DEFAULT?NULL,
??`password`?varchar(255)?DEFAULT?NULL,
??PRIMARY?KEY?(`id`)
)?ENGINE=InnoDB?DEFAULT?CHARSET=utf8;

The messages table contains the id of the private message, the id of the sender and receiver, the content of the private message, and the sending time Waiting for information:

CREATE?TABLE?`messages`?(
??`id`?int(11)?NOT?NULL?AUTO_INCREMENT,
??`sender_id`?int(11)?DEFAULT?NULL,
??`receiver_id`?int(11)?DEFAULT?NULL,
??`content`?text,
??`created_at`?datetime?DEFAULT?NULL,
??PRIMARY?KEY?(`id`)
)?ENGINE=InnoDB?DEFAULT?CHARSET=utf8;

2. Controller

Now, we can start to implement the private message function. First, create a Messages controller to handle operations related to private messages. We can generate a Messages controller through the following command:

php?think?make:controller?Messages

In the Messages controller, we can create two methods: index and send.

1. index method

The index method is used to display the user’s private message list. The code is as follows:

public?function?index()
{
????$user?=?session('user');
????$messages?=?Message::where('sender_id','=',$user->id)
????????->orWhere('receiver_id','=',$user->id)
????????->orderBy('created_at',?'desc')
????????->paginate(10);

????return?view('messages.index',?['messages'?=>?$messages]);
}

In this method, we first get the current login User information. Then, query all private messages in the messages table whose sender or recipient is the current user, and display them in reverse chronological order and in paging.

2. send method

The send method is used to send private messages. The code is as follows:

public?function?send(Request?$request)
{
????$content?=?$request->input('content');
????$receiverId?=?$request->input('receiver_id');

????$message?=?new?Message();
????$message->sender_id?=?session('user')->id;
????$message->receiver_id?=?$receiverId;
????$message->content?=?$content;
????$message->created_at?=?Carbon::now();

????$result?=?$message->save();

????return?redirect('/messages');
}

In this method, we first obtain the private message content entered by the user and the recipient's id. Then, create a new Message instance, set the sender's id, receiver's id, content and sending time, and save the private message to the database.

3. View

Finally, we need to create two views: messages.index and messages.send.

1. messages.index view

messages.index view is used to display all private messages of the current user. The code is as follows:

@foreach($messages?as?$message)
????<div class="message">
????????<p>發(fā)送者：{{$message->sender->username}}</p>
????????<p>接收者：{{$message->receiver->username}}</p>
????????<p>{{$message->content}}</p>
????????<p>時(shí)間：{{$message->created_at}}</p>
????</div>
@endforeach

{{$messages->links()}}

In this view, We use a loop statement to loop through all private messages and display information such as sender, recipient, content, and time. At the end, use the paging function $messages->links() to display paging links.

2. messages.send view

messages.send view is used to display the form for sending private messages. The code is as follows:

<form action="{{url(&#39;/messages/send&#39;)}}" method="post">
????@csrf
????<div class="form-group">
????????<label for="receiver_id">收件人：</label>
????????<select name="receiver_id" id="receiver_id" class="form-control">
????????????@foreach($users?as?$user)
????????????????<option value="{{$user->id}}">{{$user->username}}</option>
????????????@endforeach
????????</select>
????</div>

????<div class="form-group">
????????<label for="content">私信內(nèi)容：</label>
????????<textarea name="content" id="content" rows="5" class="form-control"></textarea>
????</div>

????<div class="form-group">
????????<button type="submit" class="btn btn-primary">發(fā)送</button>
????</div>
</form>

In this view, we A drop-down box is used to select recipients, and a text box is created to enter the content of the private message.

4. Summary

Through the above steps, we can implement the private message function in the ThinkPHP framework. During the operation, attention should be paid to data security issues, such as whether the user is logged in and whether the user has access rights, etc. Through good design and secure implementation, the private messaging function can better improve the user experience of social networks.

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