服务端：
<?php
$server = new Swoole\Server('127.0.0.1', 9501);$server->set(['worker_num' => 8, // worker进程数 cpu1-4倍'max_request' => 10000, // 根据内存定义 https://wiki.swoole.com/#/server/setting// 'open_eof_check' => true,// 'package_eof' => "\r\n",'open_length_check' => true,'package_max_length' => 81920,'package_length_type' => 'S', //see php pack()'package_length_offset' => 0,'package_body_offset' => 4,
]);$server->on('start', function ($server) {echo "TCP Server is started at tcp://127.0.0.1:9501\n";
});$server->on('connect', function ($server, $fd){echo "connection open: {$fd}\n";
});$server->on('receive', function ($server, $fd, $reactor_id, $data) {echo "reactor_id：{$reactor_id}\n";echo "接收到客户端数据：{$data}\n";$message = '我收到你的消息了1';$sendMessage = pack("I", strlen($message)) . $message;$server->send($fd, $sendMessage);$message = '我收到你的消息了2';$sendMessage = pack("I", strlen($message)) . $message;$server->send($fd, $sendMessage);
});$server->on('close', function ($server, $fd) {echo "connection close: {$fd}\n";
});$server->start();/*
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*/
客户端：
<?php
$client = new Swoole\Client(SWOOLE_SOCK_TCP);
if (!$client->connect('127.0.0.1', 9501, -1)) {exit("connect failed. Error: {$client->errCode}\n");
}$message = '测试一下，php客户端';
$length = pack("I", strlen($message));
$client->send($length.$message);$length = $client->recv(4);
$length = unpack("I", $length)[1];
echo "收到服务端回复：".$client->recv($length)."\n";$length = $client->recv(4);
$length = unpack("I", $length)[1];
echo "收到服务端回复：".$client->recv($length)."\n";$client->close();//https://www.runoob.com/php/func-misc-pack.html
客户端python：
import socket
import structsk = socket.socket()# 必须和server端的一致
sk.connect(('127.0.0.1', 9501))# 客户端 发送 消息给服务端
msg1 = '测试一下，python客户端'
blen = struct.pack('I', len(msg1.encode()))
sk.send(blen)
sk.send(msg1.encode('utf-8'))length = sk.recv(4)
length = struct.unpack('I', length)[0]
msg = sk.recv(length)
print(f"收到服务端回复：{msg.decode('utf-8')}")length = sk.recv(4)
length = struct.unpack('I', length)[0]
msg = sk.recv(length)
print(f"收到服务端回复：{msg.decode('utf-8')}")sk.close()
输出：
php版本的客户端稍有问题，日后再研究
