php怎么实现聊天功能-PHP问题

php怎么实现聊天功能

1、在前端使用Ajax定时轮询访问php脚本，php再进行查询聊天数据进行返回给前端，最后前端将其进行渲染；

代码示例：

在线用户列表

prepare("select * from chat where is_login = &＃39;1&＃39;");
    $rs->execute();
    while($row = $rs->fetch()){
        echo &＃39;
&＃39;.$row[&＃39;username&＃39;].&＃39;
&＃39;;    
    }
?>

connect("localhost",11211);
if(isset($_POST[&＃39;content&＃39;])){
    $con[&＃39;username&＃39;] = $_SESSION["username"];
    $con[&＃39;content&＃39;] = $_POST["content"];
    
    $data = $mem->get(&＃39;chat&＃39;);
    $data[] = $con;
    $mem->set("chat",$data,0,0);    
}
$mem->close();
*/
    if(isset($_POST[&＃39;content&＃39;])){
        session_start();
        $filename = date("Ymd",time()).".txt";
        if(file_exists($filename)){
            $cOntent= file_get_contents($filename);
            $data = json_decode($content,true);        
            $con[&＃39;username&＃39;] = $_SESSION["username"];
            $con[&＃39;content&＃39;] = $_POST["content"];
            $data[] = $con;
            $file = fopen($filename,"w");
            fwrite($file,json_encode($data));
            fclose($file);    
        }else{
            $file = fopen($filename,"w");
            $con[&＃39;username&＃39;] = $_SESSION["username"];
            $con[&＃39;content&＃39;] = $_POST["content"];
            $data[] = $con;
            fwrite($file,json_encode($data));
            fclose($file);    
        }
            
    }



?>

$old[0]){
        //echo json_encode($new[&＃39;data&＃39;]);
        //print_r($new);
        echo &＃39;2222222222&＃39;.&＃39;
&＃39;;
    }
    //echo &＃39;
11111111111111111111111111111111111111111111111111111111111111111111&＃39;;
    usleep(1000);
}
*/
/*set_time_limit(0);
$mem = new Memcache;
$mem->connect("localhost",11211);

$count = count($mem->get("chat"));
$com = true;
//$mem->delete(&＃39;chat&＃39;);
if($_POST[&＃39;msg&＃39;] == "one"){
    exit(json_encode($mem->get("chat")));    
}
if($_POST[&＃39;msg&＃39;] == "break"){
    $com = false;    
}
$time1 = time();
while(true){
    if($com){
        $data = $mem->get("chat");
        if(count($data)>$count){
            echo json_encode($data);
            break;
        }
        usleep(300);
    }else{
        break;    
    }
}
$mem->close();*/


set_time_limit(0);
$filename = date("Ymd",time()).".txt";
if(file_exists($filename)){
    $cOntent= file_get_contents($filename);
    $data = json_decode($content,true);        
    $count = count($data);
    // echo $count;die;
    if($_POST[&＃39;msg&＃39;] == "one"){
        exit(json_encode($data));    
    }
    
    while(true){
        
        $cOntents= file_get_contents($filename);
        $datas = json_decode($contents,true);
        $counts = count($datas);    
        if($counts>$count){
            echo json_encode($datas);
            break;
        }
        usleep(300);
    }
}else{
    $file = fopen($filename,"w");
    $con[&＃39;username&＃39;] = "系统消息";
    $con[&＃39;content&＃39;] = "欢迎来到EPGO聊天室";
    $data[] = $con;
    fwrite($file,json_encode($data));
    fclose($file);
    
    exit(json_encode($data));    
    
}

?>

2、使用WebSocket和服务器进行长连接，来实现聊天功能。

客户端代码：

    
    
    
    
    
    
    




    

        

            

                
在线人数：0 人
                
            
            

            
        
        

            
Tips: PHP之websocket聊天室
            

            
            

                
                
                
                
            
        
    

服务端代码：

initSocket();
    }

    private function initSocket()
    {
        try {
            //创建socket套接字
            $this->_master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
            // 设置IP和端口重用,在重启服务器后能重新使用此端口;
            socket_set_option($this->_master, SOL_SOCKET, SO_REUSEADDR, 1);
            //绑定地址与端口
            socket_bind($this->_master, $this->_ip, $this->_port);
            //listen函数使用主动连接套接口变为被连接套接口，使得一个进程可以接受其它进程的请求，从而成为一个服务器进程。在TCP服务器编程中listen函数把进程变为一个服务器，并指定相应的套接字变为被动连接,其中的能存储的请求不明的socket数目。
            socket_listen($this->_master, self::LISTEN_SOCKET_NUM);
        } catch (Exception $e) {
            $this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
        }
        //将socket保存到socket池中
        $this->_socketPool[0] = array(&＃39;resource&＃39; => $this->_master);
        $pid = getmypid();
        $this->debug(array("server: {$this->_master} started,pid: {$pid}"));
        while (true) {
            try {
                $this->run();
            } catch (Exception $e) {
                $this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
            }
        }
    }

    private function run()
    {
        $write = $except = NULL;
        $sockets = array_column($this->_socketPool, &＃39;resource&＃39;);
        $read_num = socket_select($sockets, $write, $except, NULL);
        if (false === $read_num) {
            $this->debug(array(&＃39;socket_select_error&＃39;, $err_code = socket_last_error(), socket_strerror($err_code)));
            return;
        }
        foreach ($sockets as $socket) {
            if ($socket == $this->_master) {
                $client = socket_accept($this->_master);
                if ($client === false) {
                    $this->debug([&＃39;socket_accept_error&＃39;, $err_code = socket_last_error(), socket_strerror($err_code)]);
                    continue;
                }
                //连接
                $this->connection($client);
            } else {
                //接受数据
                $bytes = @socket_recv($socket, $buffer, 2048, 0);
                if ($bytes == 0) {
                    $recv_msg = $this->disconnection($socket);
                } else {
                    if ($this->_socketPool[(int)$socket][&＃39;handShake&＃39;] == false) {
                        $this->handShake($socket, $buffer);
                        continue;
                    } else {
                        $recv_msg = $this->parse($buffer);
                    }
                }
                $msg = $this->doEvents($socket, $recv_msg);
                echo($msg);
                socket_getpeername ( $socket  , $address ,$port );
                $this->debug(array(
                    &＃39;send_success&＃39;,
                    json_encode($recv_msg),
                    $address,
                    $port
                ));
                $this->broadcast($msg);
            }
        }
    }

    /**
     * 数据广播
     * @param $data
     */
    private function broadcast($data)
    {
        foreach ($this->_socketPool as $socket) {
            if ($socket[&＃39;resource&＃39;] == $this->_master) {
                continue;
            }
            socket_write($socket[&＃39;resource&＃39;], $data, strlen($data));
        }
    }

    /**
     * 业务处理
     * @param $socket
     * @param $recv_msg
     * @return string
     */
    private function doEvents($socket, $recv_msg)
    {
        //联系我
    }

    /**
     * socket握手
     * @param $socket
     * @param $buffer
     * @return bool
     */
    public function handShake($socket, $buffer)
    {
        $acceptKey = $this->encry($buffer);
        $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
            "Upgrade: websocket\r\n" .
            "Connection: Upgrade\r\n" .
            "Sec-WebSocket-Accept: " . $acceptKey . "\r\n\r\n";

        // 写入socket
        socket_write($socket, $upgrade, strlen($upgrade));
        // 标记握手已经成功，下次接受数据采用数据帧格式
        $this->_socketPool[(int)$socket][&＃39;handShake&＃39;] = true;
        socket_getpeername ( $socket  , $address ,$port );
        $this->debug(array(
            &＃39;hand_shake_success&＃39;,
            $socket,
            $address,
            $port
        ));
        //发送消息通知客户端握手成功
        $msg = array(&＃39;type&＃39; => &＃39;handShake&＃39;, &＃39;msg&＃39; => &＃39;握手成功&＃39;);
        $msg = $this->frame(json_encode($msg));
        socket_write($socket, $msg, strlen($msg));
        return true;
    }

    /**
     * 帧数据封装
     * @param $msg
     * @return string
     */
    private function frame($msg)
    {
        $frame = [];
        $frame[0] = &＃39;81&＃39;;
        $len = strlen($msg);
        if ($len <126) {
            $frame[1] = $len <16 ? &＃39;0&＃39; . dechex($len) : dechex($len);
        } else if ($len <65025) {
            $s = dechex($len);
            $frame[1] = &＃39;7e&＃39; . str_repeat(&＃39;0&＃39;, 4 - strlen($s)) . $s;
        } else {
            $s = dechex($len);
            $frame[1] = &＃39;7f&＃39; . str_repeat(&＃39;0&＃39;, 16 - strlen($s)) . $s;
        }
        $data = &＃39;&＃39;;
        $l = strlen($msg);
        for ($i = 0; $i <$l; $i++) {
            $data .= dechex(ord($msg{$i}));
        }
        $frame[2] = $data;
        $data = implode(&＃39;&＃39;, $frame);
        return pack("H*", $data);
    }

    /**
     * 接受数据解析
     * @param $buffer
     * @return mixed
     */
    private function parse($buffer)
    {
        $decoded = &＃39;&＃39;;
        $len = ord($buffer[1]) & 127;
        if ($len === 126) {
            $masks = substr($buffer, 4, 4);
            $data = substr($buffer, 8);
        } else if ($len === 127) {
            $masks = substr($buffer, 10, 4);
            $data = substr($buffer, 14);
        } else {
            $masks = substr($buffer, 2, 4);
            $data = substr($buffer, 6);
        }
        for ($index = 0; $index getKey($req);
        return base64_encode(sha1($key . &＃39;258EAFA5-E914-47DA-95CA-C5AB0DC85B11&＃39;, true));
    }

    /**
     * 连接socket
     * @param $client
     */
    public function connection($client)
    {
        socket_getpeername ( $client  , $address ,$port );
        $info = array(
            &＃39;resource&＃39; => $client,
            &＃39;userInfo&＃39; => &＃39;&＃39;,
            &＃39;handShake&＃39; => false,
            &＃39;ip&＃39; => $address,
            &＃39;port&＃39; => $port,
        );
        $this->_socketPool[(int)$client] = $info;
        $this->debug(array_merge([&＃39;socket_connect&＃39;], $info));
    }

    /**
     * 断开连接
     * @param $socket
     * @return array
     */
    public function disconnection($socket)
    {
        $recv_msg = array(
            &＃39;type&＃39; => &＃39;logout&＃39;,
            &＃39;msg&＃39; => @$this->_socketPool[(int)$socket][&＃39;username&＃39;],
        );
        unset($this->_socketPool[(int)$socket]);
        return $recv_msg;
    }

    /**
     * 日志
     * @param array $info
     */
    private function debug(array $info)
    {
        $time = date(&＃39;Y-m-d H:i:s&＃39;);
        array_unshift($info, $time);
        $info = array_map(&＃39;json_encode&＃39;, $info);
        file_put_contents(self::LOG_PATH . &＃39;websocket_debug.log&＃39;, implode(&＃39; | &＃39;, $info) . "\r\n", FILE_APPEND);
    }
}

new socketServer();

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