PHP multi-thread simulation to achieve flash sales and grab orders

This article mainly introduces the PHP multi-thread simulation to realize the flash sale and order grabbing function in detail. It has a certain reference value. Interested friends can refer to it.

Do it for the service account at the request of the group I had a flash sale function to grab orders, and I needed to test the flash sale. I wanted to try PHP multi-threading, so I simulated the order grab function.

Let’s talk about the idea of ​​the flash kill module first:

User flash kill operation under normal circumstances

1. Initiate a flash kill request
2. Enter the flash kill queue
3. Randomly lag 1-2 seconds for the flash sale result query request (it can be regarded as a disguised diversion)
4. Generate an order if successful
5. Return the result

The following is a simulated flash sale Code:

<?php


set_time_limit(0);

/**
* 线程的执行任务
*/
class Threadrun extends Thread
{
  public $url;
  public $data;
  public $params;

  public function __construct($url, $params=[])
  {
   $this->url = $url;
   $this->params = $params;
  }

  public function run()
  {
   if(($url = $this->url))
   {
     $params = [
      &#39;goods_id&#39;  => 1,
      &#39;activity_id&#39;  => 1,
      &#39;user_id&#39;   => isset($this->params[&#39;user_id&#39;]) ? $this->params[&#39;user_id&#39;] : $this->getCurrentThreadId(),
     ];
     $startTime = microtime(true);
     $this->data = [
      &#39;id&#39;   => $params[&#39;user_id&#39;],
      &#39;result&#39;  => model_http_curl_get( $url, $params ),
      &#39;time&#39;  => microtime(true)-$startTime,
      &#39;now&#39;   => microtime(true),
     ];
   }
  }
}

/**
* 执行多线程
*/
function model_thread_result_get($urls_array)
{
  foreach ($urls_array as $key => $value)
  {
   $threadPool[$key] = new Threadrun($value["url"],[&#39;user_id&#39;=>$value[&#39;user_id&#39;]]);
   $threadPool[$key]->start();
  }
  foreach ($threadPool as $thread_key => $thread_value)
  {
   while($threadPool[$thread_key]->isRunning())
   {
     usleep(10);
   }
   if($threadPool[$thread_key]->join())
   {
     $variable_data[$thread_key] = $threadPool[$thread_key]->data;
   }
  }
  return $variable_data;
}

/**
* 发送 HTTP 请求
*/
function model_http_curl_get($url,$data=[],$userAgent="")
{
  $userAgent = $userAgent ? $userAgent : &#39;Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)&#39;;
  $curl = curl_init();
  curl_setopt($curl, CURLOPT_URL, $url);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($curl, CURLOPT_TIMEOUT, 5);
  curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);
  curl_setopt($curl, CURLOPT_POST, true);
  if( !empty($data) ) {
   curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
  }
  $result = curl_exec($curl);
  curl_close($curl);
  return $result;
}


/**
 * 友好的打印变量
 * @param $val
 */
function dump( $val )
{
  echo &#39;<pre class="brush:php;toolbar:false">&#39;;
  var_dump($val);
  echo &#39;

'; } /** * 写日志 * @param $msg * @param string $logPath */ function writeLog( $msg, $logPath='' ) { if( empty($logPath) ) { $logPath = date('Y_m_d').'.log'; } if( !file_exists($logPath) ) { $fp = fopen( $logPath,'w' ); fclose( $fp ); } error_log( $msg.PHP_EOL, 3, $logPath); } /** * 生成日志信息 * @param $result * @param $timeDiff * @return bool|string */ function createLog( $result, $timeDiff ){ if( empty($result) || !is_array($result) ) { return false; } $succeed = 0; $fail = 0; foreach( $result as $v ) { $times[] = $v['time']; $v['result'] === false ? $fail++ : $succeed++; } $totalTime = array_sum( $times ); $maxTime = max( $times ); $minTime = min( $times ); $sum = count( $times ); $avgTime = $totalTime/$sum; $segment = str_repeat('=',100); $flag = $segment . PHP_EOL; $flag .= '总共执行时间：' . $timeDiff . PHP_EOL ; $flag .= '最大执行时间：' . $maxTime . PHP_EOL; $flag .= '最小执行时间：' . $minTime . PHP_EOL; $flag .= '平均请求时间：' . $avgTime . PHP_EOL; $flag .= '请求数：' . $sum . PHP_EOL; $flag .= '请求成功数：' . $succeed . PHP_EOL; $flag .= '请求失败数：' . $fail . PHP_EOL; $flag .= $segment . PHP_EOL; return $flag; } /** * 发起秒杀请求 */ function insertList( $urls, $logPath='' ) { $t = microtime(true); $result = model_thread_result_get($urls); $e = microtime(true); $timeDiff = $e-$t; echo "总执行时间：" . $timeDiff . PHP_EOL; foreach( $result as $v ) { $msg = '用户【' . $v['id'] . '】秒杀商品, 返回结果 ' . $v['result'] . ' 用时【' . $v['time'] . ' 秒】 当前时间【'.$v['now'].'】'; writeLog( $msg,$logPath ); } $logStr = createLog( $result, $timeDiff); writeLog( $logStr, $logPath ); return $result; } //发起秒杀请求 for ($i=0; $i < 1000; $i++) { $urls_array[] = array("name" => "baidu", "url" => "http://***.***.com/seckill/shopping/listinsert"); } $list = insertList( $urls_array, './inset.log' ); //发起秒杀结果查询请求 $urls_array = []; foreach( $list as $v ) { if( $v['result'] === false ) { continue; } $urls_array[] = array( "name" => "baidu", "url" => "http://***.***.com/seckill/shopping/query", 'user_id' => $v['id'], ); } insertList( $urls_array, './query.log' );

Test code machine performance (development machine):

Order code machine performance ( Test machine):

System test results:

Simulates 1000 concurrent situations, 300 orders per second on a single machine, and the server has no pressure.
On the contrary, the test machine couldn't bear it, and the CPU surged by 100%. Apache occasionally crashes.

I don’t know whether it’s because PHP multi-threading and the Windows environment don’t support it well, or it’s a problem with PHP multi-threading itself. A mere 1,000 threads can’t run. Multi-threading still requires Python and C.

Related recommendations:

Introduction to three methods of php multi-thread simulation

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