在linux下安装很简单：

pecl install swoole

用这种方式可以自动下载安装。
我采取的是第二种方式噢。
安装完成，需要更改php.ini的配置，将

extension=swoole.so

放在这个配置中，然后重启nginx。完成以后执行

php -m

查看是否有swoole。有swoole说明安装成功。
新建一个server.php

<?php
class Server
{
    private $serv;
    public function __construct() {
        $this->serv = new swoole_server("127.0.0.1", 9501);
        $this->serv->set(array(
            'worker_num' => 1,   //一般设置为服务器CPU数的1-4倍
            // 'daemonize' => 1,  //以守护进程执行
            'max_request' => 10000,
            'dispatch_mode' => 2,
            'task_worker_num' => 8,  //task进程的数量
            "task_ipc_mode " => 3 ,  //使用消息队列通信，并设置为争抢模式
            "package_eof" => PHP_EOL,  // 设置EOF
            "log_file" => "log/taskqueueu.log" ,//日志
        ));
        $this->serv->on('Receive', array($this, 'onReceive'));
        // bind callback
        $this->serv->on('Task', array($this, 'onTask'));
        $this->serv->on('Finish', array($this, 'onFinish'));
        $this->serv->start();
    }
    public function onReceive( swoole_server $serv, $fd, $from_id, $data ) {
        echo "Get Message From Client {$fd}:{$data}n";
        // send a task to task worker.
        $serv->send($fd, "Server: ".$data);
        $serv->task( $data );
    }
    public function onTask($serv,$task_id,$from_id, $data) {
        $array = json_decode( $data , true );
        file_put_contents("test.txt", "onTask......\r\n", FILE_APPEND);
        file_put_contents("test.txt", $data."\r\n", FILE_APPEND);
        sleep(6);
        file_put_contents("test.txt", "onTask after sleep......\r\n", FILE_APPEND);
        if ($array['url']) {
            return $this->httpGet( $array['url'] , $array['param']  );
        }
    }
    public function onFinish($serv,$task_id, $data) {
        //echo "Task {$task_id} finishn";
        $temp = json_encode($data);
        file_put_contents("test.txt", "onFinish.{$temp}.....\r\n", FILE_APPEND);
        echo "Task {$task_id} finish\n";
        echo "Result: {$data}\n";
        //echo "Result: {$data}n";
    }
    protected function httpGet($url,$data){
        if ($data) {
            $url .='?'.http_build_query($data) ;
        }
        $curlObj = curl_init();    //初始化curl，
        curl_setopt($curlObj, CURLOPT_URL, $url);   //设置网址
        curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);  //将curl_exec的结果返回
        curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curlObj, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($curlObj, CURLOPT_HEADER, 0);         //是否输出返回头信息
        $response = curl_exec($curlObj);   //执行
        curl_close($curlObj);          //关闭会话
        return $response;
    }
}
$server = new Server();

再弄一个cleint.php

<?php
class Client
{
    private $client;
    public function __construct() {
        $this->client = new swoole_client(SWOOLE_SOCK_TCP);
    }
    public function connect() {
        if( !$this->client->connect("127.0.0.1", 9501 , 1) ) {
            echo "Connect Error";
        }
        $data = array(
            "url" =>  "http://test.dev/a.php" ,    //这个是在服务器去请求的
            "param" => array(
                "username"=>'test',
                "password" => 'test'
                )
            );
        $json_data = json_encode($data);
        $this->client->send( $json_data );
    }
    public function ret()
    {
        return $this->client->recv();
    }
}
echo 'this'.PHP_EOL;
$client = new Client();
$client->connect();
//从服务器接收数据
$data = $client->ret();
if (!$data)
{
    die("recv failed.");
}
var_dump($data);
echo 'dfdfdfd';

可以在test.dev下访问到的a.php

<?php
/**
 * @Author: Administrator
 * @Date:   2017-04-17 14:07:44
 * @Last Modified by:   Administrator
 * @Last Modified time: 2017-04-20 15:33:44
 */
json_encode($_REQUEST);
file_put_contents("test.txt", "This is another something.".json_encode($_REQUEST), FILE_APPEND);
echo json_encode( ['test' => 'test-hello']);

然后启动： php server.php
在浏览器访问 client.php
就可以看到效果啦。