mysql 异步执行 query //@todo

http://stackoverflow.com/questions/27240421/php-asynchronous-mysql-query

http://php.net/manual/en/mysqlinfo.library.choosing.php

$mysqli = new mysqli("localhost", "root", "", "test");

// ee($mysqli);

 $a = $mysqli->query("select sleep (2)", MYSQLI_ASYNC);

echo ‘run other stuff ‘."\n";

$result = $mysqli->reap_async_query();
$resultArray = $result->fetch_assoc();

ee($resultArray);