PHP implements real-time Weibo and dynamic message push technology

With the popularity of mobile Internet and social media, real-time Weibo and dynamic message push technology have become essential functions for many Internet applications. PHP is a commonly used server-side scripting language. Real-time Weibo and dynamic message push technology can also be implemented through PHP. This article will introduce the specific steps to implement real-time Weibo and dynamic message push technology in PHP.

1. Use Ajax to implement real-time Weibo

Real-time Weibo means that when a user posts a Weibo, other users can see the Weibo in a timely manner without refreshing the page. The technology to realize real-time microblogging can use Ajax technology.

First of all, on the front-end page, we can use front-end frameworks such as Jquery to send Ajax requests. Server-side scripts use PHP to process requests and output response results.

The following is Php code to save Weibo, get Weibo list and output Weibo

Save Weibo:

function saveWeibo($content) {
 $sql = "INSERT INTO weibo (content,create_time) VALUES ('" . $content . "','" . time() . "')";
 // 执行插入操作
 $result = mysqli_query(self::$link, $sql);
 return $result;
}

Get Weibo list:

function getWeiboList($last_time) {
 $sql = "SELECT * FROM weibo WHERE create_time>$last_time ORDER BY create_time DESC";
 $result = mysqli_query(self::$link, $sql);
 $list = [];
 while ($row=mysqli_fetch_assoc($result)) {
  $list[] = $row;
 }
 return $list;
}

Output Weibo:

function outputWeibo($weibo) {
 $content = $weibo['content'];
 $time = date("Y-m-d H:i:s",$weibo['create_time']);
 echo "<div class='weibo-item'>";
 echo "<p class='weibo-content'>" . $content . "</p>";
 echo "<p class='weibo-time'>" . $time . "</p>";
 echo "</div>";
}

Then, in the front-end page, we can use Jquery to perform Ajax requests regularly, obtain new Weibo from the server, and add it to the page.

setInterval(function(){
  $.ajax({
   url:'get_weibo.php',
   type:'post',
   dataType:'json',
   data:{'last_time':last_time},
   success:function(data){
    if(data.length>0){
     last_time = data[0].create_time;
     $.each(data,function(i,weibo){
      output_weibo(weibo);
     });
    }
   }
  });
},interval_time);

2. Use WebSocket to implement dynamic message push

WebSocket is a full-duplex communication protocol based on the TCP protocol. It can establish real-time, two-way communication between the browser and the server. Communication, realize dynamic message push.

The following is the code to implement WebSocket using PHP and Swoole extension.

First, we need to use Swoole's WebSocket server to start the WebSocket service.

$server = new SwooleWebSocketServer('0.0.0.0', 9502);

$server->on('open', function ($server, $req) {
 echo "connection open: {$req->fd}
";
});

$server->on('message', function ($server, $frame) {
 echo "received message: {$frame->data}
";
 $server->push($frame->fd, "hello, {$frame->data}!");
});

$server->on('close', function ($server, $fd) {
 echo "connection close: {$fd}
";
});

$server->start();

Then, in the front-end page, we can use the WebSocket API to establish a connection with the server to achieve real-time two-way communication.

var ws = new WebSocket("ws://localhost:9502");

ws.onopen = function() {
 console.log("websocket open");
 ws.send("hello websocket");
};

ws.onmessage = function(evt) {
 console.log("receive message from server: " + evt.data);
};

ws.onclose = function() {
 console.log("websocket close");
};

In actual development, we can use WebSocket in combination with other PHP technologies, such as Redis, MongoDB, etc., according to needs, to achieve richer dynamic message push functions.

Summary:

PHP is a powerful server-side scripting language. By using PHP, functions such as real-time Weibo and dynamic message push can be realized. In practical applications, we need to select appropriate technologies according to specific needs and use them in conjunction with other development technologies.

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