How to use PHP swoole

PHP is used in the project, but due to the long and time-consuming task, after the front-end is submitted, the server needs to respond asynchronously.

There are many solutions for server asynchronous, including MQ, fsocket, Swoole, etc. (Recommended learning: swoole video tutorial)

Swoole is written in pure C language and provides an asynchronous multi-threaded server in PHP language, asynchronous TCP/UDP network client, asynchronous MySQL, asynchronous Redis , database connection pool, AsyncTask, message queue, millisecond timer, asynchronous file reading and writing, asynchronous DNS query. Swoole has built-in Http/WebSocket server/client and Http2.0 server.

The most important thing is that it perfectly supports the PHP language. So I used Swoole to build an asynchronous server to provide a series of tasks such as asynchronous response, push, and scheduled tasks.

Swoole is written in C language and is compiled and installed.

The installation dependencies are:

php-5.3.10 或更高版本
gcc-4.4 或更高版本

make
autoconf
pcre (centos系统可以执行命令：yum install pcre-devel)

Installation method:

phpize #如果命令不存在 请在前面加上php的实际路径
./configure
make 
sudo make install

After compilation is completed, you need to install php Add extension to .ini

extension=swoole.so

Server

class Server{
    private $serv;
    public function __construct() {
        $this->serv = new swoole_server("0.0.0.0", 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,
            'task_worker_num' => 1,  //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
            'open_length_check'    => true,
            'dispatch_mode'        => 1,
            'package_length_type'  => 'N',  //这个很关键，定位包头的
            'package_length_offset' => 0,      //第N个字节是包长度的值
            'package_body_offset'  => 4,      //第几个字节开始计算长度
            'package_max_length'    => 2000000,  //协议最大长度
            "log_file" => "/tmp/swoole_test.log"  //日志
        ));
        $this->serv->on('Receive', array($this, 'onReceive'));
        $this->serv->on('Task', array($this, 'onTask'));
        $this->serv->on('Finish', array($this, 'onFinish'));
        $this->serv->start();
    }
    public function onReceive( swoole_server $serv, $fd, $from_id, $data ) {
        //放入任务队列，开始执行
        $task_id = $serv->task( $data );
    }
    public function onTask($serv,$task_id,$from_id, $data) {
      //做一些事情
    }

Client

class Client{
    private $client, $ip, $port, $params;
    public function __construct($ip, $port, $params)
    {
        $this->ip = $ip;
        $this->port = $port;
        $this->params = $params;
        $this->client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);
        $this->client->set(array(
            'open_length_check'    => true,
            'package_length_type'  => 'N',
            'package_length_offset' => 0,      //第N个字节是包长度的值
            'package_body_offset'  => 4,      //第几个字节开始计算长度
            'package_max_length'    => 2000000,  //协议最大长度
        ));
        //设置事件回调函数
        $this->client->on('Connect', array($this, 'onConnect'));
        $this->client->on('Receive', array($this, 'onReceive'));
        $this->client->on('Close', array($this, 'onClose'));
        $this->client->on('Error', array($this, 'onError'));
        //发起网络连接
        $this->client->connect($ip, $port, 3);
    }
    public function onReceive( $cli, $data ) {
        echo "Received: " . $data . "\n";
    }
    public function onConnect($cli) {
        $data = pack('N', strlen($data)) . $data;
        $cli->send($data);
        $cli->close();
    }
    public function onClose( $cli)
    {
        echo "Connection close\n";
    }
    public function onError()
    {
        echo "Connect failed\n";
    }
}

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