php socket

#TCP示例

 

//服务端
<?php

//创建socket套接字
        $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//设置阻塞模式
        socket_set_block($socket);
//为套接字绑定ip和端口
        socket_bind($socket,'127.0.0.1',3046);
//监听socket
        socket_listen($socket,4);

        while(true)
        {
            //接收客户端请求
            if(($msgsocket = socket_accept($socket)) !== false)
            {
                //读取请求内容
                $buf = socket_read($msgsocket, 8192);
                echo "$buf \n";
                $str = '{"code":200}';
                //向连接的客户端发送数据
                socket_write($msgsocket, $str,strlen($str));
                //操作完之后需要关闭该连接否则 feof() 函数无法正确识别打开的句柄是否读取完成
                socket_close($msgsocket);
            }
        }



//客户端
<?php

$st = "send something";
        echo $st."\r\n";
//创建tcp套接字
        $i=1;
        while(true){
            echo $i."\r\n";
            $socket = socket_create(AF_INET,SOCK_STREAM,SOL_TCP);
            $length = strlen($st);
//连接tcp
            socket_connect($socket, '127.0.0.1',3046);
//向打开的套集字写入数据（发送数据）
            $s = socket_write($socket, $st, $length);
//从套接字中获取服务器发送来的数据
            $msg = socket_read($socket,8190);
//关闭连接
            sleep(1);
            socket_close($socket);
            $i++;
        }

#UPD示例

//服务端

private function udpServer(){
        //服务器信息
        $server = 'udp://127.0.0.1:9998';
//消息结束符号
        $msg_eof = "\n";
        $socket = stream_socket_server($server, $errno, $errstr, STREAM_SERVER_BIND);
        if (!$socket) {
            die("$errstr ($errno)");
        }

        do {
            //接收客户端发来的信息
            $inMsg = stream_socket_recvfrom($socket, 1024, 0, $peer);
            //服务端打印出相关信息
            echo "Client : $peer\n";
            echo "Receive : {$inMsg}";
            //给客户端发送信息
            $outMsg = substr($inMsg, 0, (strrpos($inMsg, $msg_eof))).' -- '.date("D M j H:i:s Y\r\n");
            stream_socket_sendto($socket, $outMsg, 0, $peer);

        } while ($inMsg !== false);
    }

//客户端
private function udpClient(){
        $udpGet = function ($sendMsg = '', $ip = '127.0.0.1', $port = '9998'){
            $handle = stream_socket_client("udp://{$ip}:{$port}", $errno, $errstr);
            if( !$handle ){
                die("ERROR: {$errno} - {$errstr}\n");
            }
            fwrite($handle, $sendMsg."\n");
            $result = fread($handle, 1024);
            fclose($handle);
            return $result;
        };

        $result = $udpGet('Hello World');
        echo $result;
    }