websocket服务器（协程风格）--swoole进阶篇
swoole的websocket服务器（协程风格）示例真不算友善，从头了解到尾，那还好，但是谁有那么多时间从头到尾了解。示例不够针对性，写websocket就该单独写websocket的东西，偏偏又加上http的东西。这里我来解读一下websocket服务器（协程风格）示例
<?php
use Swoole\Http\Request;
use Swoole\Http\Response;
use Swoole\WebSocket\CloseFrame;
use Swoole\Coroutine\Http\Server;
use function Swoole\Coroutine\run;
run(function () {
$server = new Server('127.0.0.1', 9502, false);
$server->handle('/websocket', function (Request $request, Response $ws) {
$ws->upgrade();
while (true) {
$frame = $ws->recv();
if ($frame === '') {
$ws->close();
break;
} else if ($frame === false) {