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))
{
$params = [
'goods_id' => 1,
'activity_id' => 1,
'user_id' => isset($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( $val )
{
echo '<pre class="brush:php;toolbar:false">';
var_dump($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' );
Copy after login
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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