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<?php
namespace MsqServer;
class Process
{
    public $_pid;
    public $_msgid;

}
class Server
{
    public $_socketFile = "pool.sock";
    public $_processNum = 3;
    public $_keyFile = __FILE__;
    public $_process = [];
    public $_idx;
    public $_sockfd;
    public $_roll = 0;
    public $_run = true;
    public function __construct($num = 3)
    {
        $this->_processNum = $num;
        pcntl_signal(SIGINT, [$this,"sigHandler"]);
        $this->forkWorker();
        $this->Listen();
        $exitPid = [];
        while (1){
            $pid = pcntl_wait($status);
            if($pid > 0){
                $exitPid[] = $pid;
            }
            if(count($exitPid) == $this->_processNum){
                break;
            }
        }
        foreach ($this->_process as $p){
            /** @var Process $p */
            msg_remove_queue($p->_msgid);
        }
        fprintf(STDOUT, "master shutdown\n");
        unlink($this->_socketFile);
    }

    public function sigHandler($signo)
    {
        $this->_run = false;
    }
    public function forkWorker()
    {
        $processObj = new Process();
        for ($i=0;$i<$this->_processNum;$i++){
            $key = ftok($this->_keyFile, $i);
            $msg_id = msg_get_queue($key);

            $process = clone $processObj;
            $process->_msgid = $msg_id;
            $this->_process[$i] = $process;
            $this->_idx = $i;

            $this->_process[$i]->_pid = pcntl_fork();
            if($this->_process[$i]->_pid == 0){
                $this->worker();
            }else{
                continue;
            }
        }
    }
    public function Listen()
    {
        $this->_sockfd = socket_create(AF_UNIX, SOCK_STREAM, 0);
        if(!is_resource($this->_sockfd)){
            fprintf(STDOUT, "socket create fail %s\n",socket_strerror(socket_last_error($this->_sockfd)));
        }

        if(!socket_bind($this->_sockfd, $this->_socketFile)){
            fprintf(STDOUT, "socket bind fail %s\n",socket_strerror(socket_last_error($this->_sockfd)));
        }
        socket_listen($this->_sockfd,10);
        $this->eventLoop();
    }

    public function worker()
    {
        fprintf(STDOUT, "child pid %d start \n",posix_getpid());
        /** @var Process $process */
        $process = $this->_process[$this->_idx];
        $msgid = $process->_msgid;
        while (1){
            if(msg_receive($msgid, 0, $msgType, 1024, $message)){
                fprintf(STDOUT, "child pid %d recv %s\n",posix_getpid(),$message);
                if(strncasecmp($message, "quit", 4) == 0){
                    break;
                }
            }
        }
        fprintf(STDOUT, "child pid %d shutdown \n",posix_getpid());
        exit(0);
    }

    public function selectWorker($data)
    {
        /** @var Process $process */
        $process = $this->_process[$this->_roll++%$this->_processNum];
        $msgid = $process->_msgid;
        if(msg_send($msgid, 1, $data,true,false)){
            fprintf(STDOUT, "master send ok\n");
        }
    }
    public function eventLoop()
    {
        $readFds = [$this->_sockfd];
        $writeFds = [];
        $expFds = [];

        while ($this->_run){
            pcntl_signal_dispatch();
            $ret = socket_select($readFds, $writeFds, $expFds,NULL);
            if($ret === false){
                break;
            }else if($ret === 0){
                continue;
            }
            if($readFds){
                foreach ($readFds as $fd){
                    if($fd === $this->_sockfd){
                        $connfd = socket_accept($this->_sockfd);
                        $data = socket_read($connfd, 1024);
                        if($data){
                            $this->selectWorker($data);
                        }
                        socket_write($connfd, "ok",2);
                        socket_close($connfd);
                    }
                }
            }
        }
        socket_close($this->_sockfd);

        foreach ($this->_process as $p){

            /** @var \MsqServer\Process  $p **/
            if(msg_send($p->_msgid, 1, "quit")){
                fprintf(STDOUT, "master send quit ok\n");
            }
        }
    }
}
(new Server(3));

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<?php

$sockFile = "pool.sock";
$sockfd = socket_create(AF_UNIX, SOCK_STREAM, 0);
if(socket_connect($sockfd, $sockFile)){

    echo socket_write($sockfd, "i am client",11);

    echo socket_read($sockfd, 1024);

}
socket_close($sockfd);