<?php
/**
 * 創(chuàng)建多進(jìn)程
 */
$worker_num     = 6;    // 默認(rèn)進(jìn)程數(shù)
$workers       = [];    // 進(jìn)程保存
$redirect_stdout  = false;  // 重定向輸出 ; 這個(gè)參數(shù)用途等會(huì)我們看效果
for($i = 0; $i < $worker_num; $i++){
  $process = new swoole_process('callback_function', $redirect_stdout);
  // 啟用消息隊(duì)列 int $msgkey = 0, int $mode = 2
  $process->useQueue(0, 2);
  $pid = $process->start();
  // 管道寫入內(nèi)容
  $process->write('index:'.$i);
  $process->push('進(jìn)程的消息隊(duì)列內(nèi)容');
  // 將每一個(gè)進(jìn)程的句柄存起來
  $workers[$pid] = $process;
}
/**
 * 子進(jìn)程回調(diào)
 * @param swoole_process $worker [description]
 * @return [type]         [description]
 */
function callback_function(swoole_process $worker)
{
  $recv = $worker->pop();
  echo "子輸出主內(nèi)容: {$recv}".PHP_EOL;
  //get guandao content
  $recv = $worker->read();
  $result = doTask();
  echo PHP_EOL.$result.'==='.$worker->pid.'==='.$recv;
  $worker->exit(0);
}
/**
 * 監(jiān)控/回收子進(jìn)程
 */
while(1){
  $ret = swoole_process::wait();
  if ($ret){// $ret 是個(gè)數(shù)組 code是進(jìn)程退出狀態(tài)碼，
    $pid = $ret['pid'];
    echo PHP_EOL."Worker Exit, PID=" . $pid . PHP_EOL;
  }else{
    break;
  }
}
/**
 * doTask
 * @return [type] [description]
 */
function doTask()
{
  sleep(2);
  return true;
}