danci/www.hanlinyuanonline.com/workerman/start_io.php

<?php
use Workerman\Worker;
use Workerman\WebServer;
use Workerman\Lib\Timer;
use PHPSocketIO\SocketIO;

include __DIR__ . '/vendor/autoload.php';

// 全局数组保存uid在线数据
$uidConnectionMap = array();
// 记录最后一次广播的在线用户数
$last_online_count = 0;
// 记录最后一次广播的在线页面数
$last_online_page_count = 0;

// PHPSocketIO服务
$sender_io = new SocketIO(2120);
// 客户端发起连接事件时，设置连接socket的各种事件回调
$sender_io->on('connection', function($socket){
    // 当客户端发来登录事件时触发
    $socket->on('login', function ($uid)use($socket){
        global $uidConnectionMap, $last_online_count, $last_online_page_count;
        // 已经登录过了
        if(isset($socket->uid)){
            return;
        }
        // 更新对应uid的在线数据
        $uid = (string)$uid;
        if(!isset($uidConnectionMap[$uid]))
        {
            $uidConnectionMap[$uid] = 0;
        }
        // 这个uid有++$uidConnectionMap[$uid]个socket连接
        ++$uidConnectionMap[$uid];
        // 将这个连接加入到uid分组，方便针对uid推送数据
        $socket->join($uid);
        $socket->uid = $uid;
        // 更新这个socket对应页面的在线数据
        //$socket->emit('update_online_count', "当前<b>{$last_online_count}</b>人在线，共打开<b>{$last_online_page_count}</b>个页面");
    });
    
    // 当客户端断开连接是触发（一般是关闭网页或者跳转刷新导致）
    $socket->on('disconnect', function () use($socket) {
        if(!isset($socket->uid))
        {
             return;
        }
	//$url = 'http://47.104.128.143/cron/offline/index?uid='.$socket->uid;
        //file_get_contents($url);
	$param = '/cron/offline/index?uid='.$socket->uid;
	$fp = fsockopen("47.104.128.143", 80, $errno, $errstr, 30);
	if (!$fp) {
	echo "$errstr ($errno)<br />\n";
	} else {
		$out = "GET $param HTTP/1.1\r\n";
		$out .= "Host: 47.104.128.143\r\n";
		$out .= "Connection: Close\r\n\r\n";
		fwrite($fp, $out);
		#while (!feof($fp)) {
			#echo fgets($fp, 128);
		#}
		fclose($fp);
	}

        global $uidConnectionMap, $sender_io;
        // 将uid的在线socket数减一
        if(--$uidConnectionMap[$socket->uid] <= 0)
        {
            unset($uidConnectionMap[$socket->uid]);
        }
    });
});

// 当$sender_io启动后监听一个http端口，通过这个端口可以给任意uid或者所有uid推送数据
$sender_io->on('workerStart', function(){
    // 监听一个http端口
    $inner_http_worker = new Worker('http://0.0.0.0:2121');
    // 当http客户端发来数据时触发
    $inner_http_worker->onMessage = function($http_connection, $data){
        global $uidConnectionMap;
        $_POST = $_POST ? $_POST : $_GET;
        // 推送数据的url格式 type=publish&to=uid&content=xxxx
        switch(@$_POST['type']){
            case 'publish':
                global $sender_io;
                $to = @$_POST['to'];
                //$_POST['content'] = htmlspecialchars(@$_POST['content']);
                // 有指定uid则向uid所在socket组发送数据
                if($to){
                    $sender_io->to($to)->emit('new_msg', $_POST['content']);
                // 否则向所有uid推送数据
                }else{
                    $sender_io->emit('new_msg', @$_POST['content']);
                }
                // http接口返回，如果用户离线socket返回fail
                if($to && !isset($uidConnectionMap[$to])){
                    return $http_connection->send('offline');
                }else{
                    return $http_connection->send('ok');
                }
		break;
            case 'online':
                return $http_connection->send(json_encode($uidConnectionMap));
                break;
        }
        return $http_connection->send('fail');
    };
    // 执行监听
    $inner_http_worker->listen();

    // 一个定时器，定时向所有uid推送当前uid在线数及在线页面数
    Timer::add(1, function(){
        global $uidConnectionMap, $sender_io, $last_online_count, $last_online_page_count;
        $online_count_now = count($uidConnectionMap);
        $online_page_count_now = array_sum($uidConnectionMap);
        // 只有在客户端在线数变化了才广播，减少不必要的客户端通讯
        if($last_online_count != $online_count_now || $last_online_page_count != $online_page_count_now)
        {
            //$sender_io->emit('update_online_count', "当前<b>{$online_count_now}</b>人在线，共打开<b>{$online_page_count_now}</b>个页面");
            $last_online_count = $online_count_now;
            $last_online_page_count = $online_page_count_now;
        }
    });
});

if(!defined('GLOBAL_START'))
{
    Worker::runAll();
}