swoole异步MySql

1：先创建服务端文件MySql.php再创建数据库以及简单的数据表

<?php
use Swoole\Runtime;
use Swoole\Coroutine;
use function Swoole\Coroutine\run;
class MySql
{
    
    public function go(){
        Runtime::enableCoroutine();
        $s = microtime(true);
        Co\run(function() {
            
            for ($c = 50; $c--;) {
                go(function(){
                    $pdo = new PDO('mysql:host=127.0.0.1;dbname=demo;charset=utf8', 'demo', 'demo');
                    $statement = $pdo->prepare('SELECT `demo` FROM `demo` where id = 1');
                    for ($n = 100; $n--;) {
                        $statement->execute();
                        $res = $statement -> fetch();
                        var_dump('a:' . $res['user_name']);
                    }
                });
            }
            
            for ($c = 50; $c--;) {
                go(function(){
                    $pdo = new PDO('mysql:host=127.0.0.1;dbname=demo;charset=utf8', 'demo', 'demo');
                    $statement = $pdo->prepare('SELECT `demo` FROM `demo` where id = 1');
                    for ($n = 100; $n--;) {
                        $statement->execute();
                        $res = $statement -> fetch();
                        var_dump('b:' . $res['user_name']);
                    }
                });
            }
            
            
        });
        
        var_dump('用时：' . (microtime(true) - $s) . ' s');
        
    }
    
    
}
$mysql = new MySql();
$mysql->go();

2：启动服务php MySql.php 会发现输出的a里面掺杂b,b里面掺杂1，耗时短