解決rabbitMQ時報錯Call to undefined function PhpAmqpLib\Wire\bcadd()

環境：lnmp 

PHP 7.2.12-1+ubuntu18.04.1+deb.sury.org+1 (cli) (built: Nov 12 2018 09:55:44) ( NTS )

如下模塊已開啓

執行如下rabbitMQ會報錯

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace app\commands;

use yii\console\Controller;
use yii\console\ExitCode;

use PhpAmqpLib\Connection\AMQPStreamConnection;
use PhpAmqpLib\Message\AMQPMessage;

/**
 * This command echoes the first argument that you have entered.
 *
 * This command is provided as an example for you to learn how to create console commands.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class SendController extends Controller
{

    public function actionIndex()
    {
        $connection = new AMQPStreamConnection('localhost', 5672, 'admin', 'admin');
        $channel = $connection->channel();

        $channel->queue_declare('hello', false, false, false, false);

        $msg = new AMQPMessage('Hello World!!!!!!');
        $channel->basic_publish($msg, '', 'hello');

        echo " [x] Sent 'Hello World!'\n";

        $channel->close();
        $connection->close();
    }
}

這是因爲bcmath的版本對不上的緣由

執行如下更新：

sudo apt-get install php7.2-bcmath

再次執行