swoole一键协程

swoole4.x后支持一键协程 加上后，开启一键协程化后，MySQL、Redis、Curl 等操作会变成异步 IO

//此行代码后，文件操作，sleep，Mysqli，PDO，streams等都变成异步IO，见文档"一键协程化"章节

Swoole\Runtime::enableCoroutine();

Co\run(function() {

    // i just want to sleep...

    for ($c = 100; $c--;) {

        go(function () {

            for ($n = 100; $n--;) {

                sleep(1);

                echo $n.PHP_EOL;

            }

        });

    }

    // 10k file read and write

    for ($c = 100; $c--;) {

        go(function () use ($c) {

            $tmp_filename = "/tmp/test-{$c}.php";

            for ($n = 100; $n--;) {

                $self = file_get_contents(__FILE__);

                file_put_contents($tmp_filename, $self);

                echo $tmp_filename.PHP_EOL;

                assert(file_get_contents($tmp_filename) === $self);

            }

            unlink($tmp_filename);

        });

    }

});