七:使用channel多协程运行顺序控制的基本方法

一:使用channel多协程运行顺序控制的基本方法

<?php
    use Swoole\Coroutine as co;
    function query(array $sqls){
        $mysql=new co\MySQL();
        $conn=$mysql->connect(['host' => '192.168.1.109', 'user' => 'root', 'password' => 'SwoftTest@1234', 'database' => 'swoft2',]);
        foreach($sqls as $sql){
            $statement=$mysql->prepare($sql);
            $rows=$statement->execute();
            foreach ($rows as $row)
            {
                foreach ($row as $k=>$v)
                {
                    echo $k."=>".$v;
                }
            }
        }
        echo PHP_EOL;
    }

    go(function (){
        $chan=new co\Channel(2);
        go(function() use($chan){//协程1
            query(["select sleep(3)","select * from user where user_id=1"]);
            $chan->push(1);
        });

        go(function()use($chan){//协程2
            query(["select * from user where user_id=2"]);
            $chan->push(2);
        });

       for ($i=0;$i<2;$i++)
        {
            $chan->pop();
        }
        echo "done".PHP_EOL;//待两个协程执行完毕会执行 此输出函数
    });


执行结果: