<?php
// ...
use React\EventLoop\Factory as LoopFactory;
use React\MySQL\Factory;
use ReactPHP\MySQL\Decorator\BindAssocParamsConnectionDecorator;
// ...
$loop = LoopFactory::create();
$factory = new Factory($loop);
$uri = 'username:password@localhost/dbname';
$connection = $factory->createLazyConnection($uri); // returns a React\MySQL\ConnectionInterface
$connectionWithBindAssocParams = new BindAssocParamsConnectionDecorator($connection);
// Now you can bind associative parameters when you execute your queries.
$value = 123;
$connectionWithBindAssocParams->query('SELECT * FROM table WHERE field = :value', [
   ':value' => $value
])->then(
   // ...
);