PHP写的异步高并发服务器，基于libevent_PHP_编程开发_程序员俱乐部

Swoole Socket网络开发框架，是基于php的libevent和pcntl模块的，并且只能用于Linux/Unix系统下。请先启用pcntl，安装libevent扩展。

pcntl：PHP核心模块已包含了pcntl，只需在编译时加入--enable-pcntl即可，当然也可以用extension扩展

libevent：http://pecl.php.net/package/libevent

编写的类需要继承自TCPServer类，在SwooleSocket包中。目前只提供了单进程异步事件模型，适合用于IO耗时较少的网络服务器程序，比如聊天室。多进程异步模型，多进程同步模型，会在近期提供。基类的代码，请从http://code.google.com/p/swoole/检出

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<?php
require 'TCPServer.php';

class MyServer extends TCPServer
{
    function onRecive($client_id,$data)
    {
        $data = trim($data);
		if($data=="quit")
		{
			$this->close($client_id);
			return true;
		}
		elseif($data=='shutdown')
		{
		    $this->shutdown();
		}
		else
		{
		    $client_socket_name =  stream_socket_get_name($this->client_sock[$client_id],true);
    		echo "Server send response data to client $client_socket_name\n";
    		$send = date('Y-m-d H:i:s')."$client_socket_name said:$data\n";
    		$this->sendAll($client_id,$send);
		}
    }
    /**
     * 发送到所有客户端
     * @param $data
     * @return unknown_type
     */
	function sendAll($client_id,$data)
	{
	    foreach($this->client_sock as $k=>$sock)
	    {
	        if($k==$client_id) continue;
	        fwrite($sock,$data);
	    }
	}
    /**
     * 发送到某个客户端
     * @param $client_id
     * @param $data
     * @return unknown_type
     */
	function sendTo($client_id,$data)
	{
	    fwrite($this->client_sock[$client_id],$data);
	}

    function onStart()
    {
        echo "Server in running!\n";
    }

    function onConnect($client_id)
    {
        $this->sendAll($client_id,"Client $client_id is connected!\n");
    }

    function onClose($client_id)
    {
        $this->sendAll($client_id,"Client $client_id is closed!\n");
    }

    function onShutdown()
    {
        echo "Server in stop!\n";
    }
}

$server = new MyServer('0.0.0.0',8005);
$server->run();

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客户端程序

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<?php
class Stdio
{
    static $in;
    static $out;
    static $buffer_size = 1024;

    static function input($h='')
    {
        if(!self::$in) self::$in = fopen('php://stdin','r');
        if($h) self::output($h);
        return trim(fread(self::$in,self::$buffer_size));
    }
    static function output($string)
    {
        if(!self::$out) self::$out = fopen('php://stdout','w');
        return fwrite(self::$out,$string);
    }
}

$fp = stream_socket_client('tcp://127.0.0.1:8005',$errno, $errstr);
$socket = serialize($fp);
if(!$fp)
{
    echo "ERROR: $errno - $errstr<br />\n";
}
else
{
    $pid = pcntl_fork();
    if($pid==-1)
    {
        exit("fork fail!\n");
    }
    //child
    elseif($pid==0)
    {
        var_dump($socket);
        $fp2 = unserialize($socket);
        while(!feof($fp2))
        {
            Stdio::output(fgets($fp2, 1024));
        }
    }
    //parent
    else
    {
        while($string!=="quit")
        {
            if(!is_writable($fp)) break;
            $string = Stdio::input("qq#");
            fwrite($fp,$string);
        }
        posix_kill($pid, 9);
    }
    fclose($fp);
}

php tcpclient.php 运行客户端程序，客户端有2个进程，主进程负责接收输入信息，发送到网络。另一个进程，接收网络信息，显示在屏幕上。