看看PHP 多进程处置任务-百分百源码网

看看PHP 多进程处置任务

发布时间：10/01 来源：未知浏览：关键词：

`pcntl` 模块（非 Unix 类系统不支撑此模块）

一个 PHP 多进程简便例子大约是这个模样：

// 5 个子进程处置任务for ($i = 0; $i < 5; $i++) {
    $pid = pcntl_fork();    if ($pid == -1) {        die("could not fork");
    } elseif ($pid) {        echo "I'm the Parent $i\n";
    } else { // 子进程处置
        echo "I'm the Child $i\n";        // 业务处置
        exit($i); // 必然要留意退出子进程，不然 pcntl_fork() 会被子进程再 fork，带来处置上的影响。
    }
}// 等候子进程施行完毕while (pcntl_waitpid(0, $status) != -1) {
    $status = pcntl_wexitstatus($status);    echo "Child $status completed\n";
}复制代码

当然实际利用中我们不克不及够这样输出代码，不足强健，也不足文雅，我所以寻了个基于 pcntl 封装的扩展包来使用。

spatie/async - 基于 `pcntl` 封装的扩展包

以下是我使用 spatie/async 来优化一个多进程恳求的例子

原代码（耗时 20s 摆布）- github.com/guanguans/m…

/**
 * @param string $keyword
 *
 * @return array
 */public function searchAll(string $keyword): array{
    $songAll = [];    foreach ($this->platforms as $platform) {
        $songAll = array_merge($songAll, $this->search($platform, $keyword));
    }    return $songAll;
}/**
 * @param string $platform
 * @param string $keyword
 *
 * @return mixed
 */public function search(string $platform, string $keyword){
    $meting = $this->getMeting($platform);

    $songs = json_decode($meting->format()->search($keyword), true);    foreach ($songs as $key => &$song) {
        $detail = json_decode($meting->format()->url($song['url_id']), true);        if (empty($detail['url'])) {            unset($songs[$key]);
        }
        $song = array_merge($song, $detail);
    }    unset($song);    return $songs;
}复制代码

改善后（耗时 4s 摆布）- github.com/guanguans/m…

/**
 * @param string $keyword
 *
 * @return array
 */public function searchAll(string $keyword): array{
    $songAll = [];
    $pool = Pool::create();    foreach ($this->platforms as $platform) {
        $pool->add(function () use ($platform, $keyword) {            return $this->search($platform, $keyword);
        }, $this->getSerializedOutput())->then(function ($output) use (&$songAll) {
            $songAll = array_merge($songAll, $output);
        })->catch(function (\Throwable $exception) {            exit($exception->getMessage());
        });
    }
    $pool->wait();    return $songAll;
}/**
 * @return mixed
 */public function search(string $platform, string $keyword){
    $meting = $this->getMeting($platform);
    $songs = json_decode($meting->format()->search($keyword), true);

    $pool = Pool::create();    foreach ($songs as $key => &$song) {
        $pool->add(function () use ($meting, $song) {            return json_decode($meting->format()->url($song['url_id']), true);
        })->then(function ($output) use (&$songs, &$song, $key) {
            $song = array_merge($song, $output);            if (empty($song['url'])) {                unset($songs[$key]);
            }
        })->catch(function (\Throwable $exception) {            exit($exception->getMessage());
        });
    }    unset($song);
    $pool->wait();    return $songs;
}复制代码