PHP implements flash sale code

At the request of the group, we created a flash sale function for the service account. We needed to test the flash sale. We wanted to try PHP multi-threading, so we simulated the order grabbing function. This article mainly shares with you PHP multi-thread simulation to realize the flash sale and order grabbing function. It has certain reference value. Interested friends can refer to it. I hope it can help everyone.

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

User flash sale operation under normal circumstances

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

The following are Code to simulate flash sale:

url = $url; $this->params = $params; } public function run() { if(($url = $this->url)) { $params = [ 'goods_id' => 1, 'activity_id' => 1, 'user_id' => isset($this->params['user_id']) ? $this->params['user_id'] : $this->getCurrentThreadId(), ]; $startTime = microtime(true); $this->data = [ 'id' => $params['user_id'], 'result' => model_http_curl_get( $url, $params ), 'time' => microtime(true)-$startTime, 'now' => microtime(true), ]; } } } /** * 执行多线程 */ function model_thread_result_get($urls_array) { foreach ($urls_array as $key => $value) { $threadPool[$key] = new Threadrun($value["url"],['user_id'=>$value['user_id']]); $threadPool[$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 : 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)'; $curl = curl_init(); curl_setopt($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( $val ) { echo '
'; var_dump($val); echo '
'; } /** * 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:
      
Simulating 1000 concurrent situations, a single machine can process 300+ orders per second, 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 the poor support of PHP multi-threading and Windows environment, or the problem of PHP multi-threading itself, but only 1000 threads can’t run. Multi-threading still requires Python and C.
      
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