Cannot load PHP class when running Symfony command - php

Question

I would appreciate any help I can get with following issue.
I've set up Symfony Messenger to use AMQP and RabbitMQ. I can dispatch message and make use of AMQPConnection within my project.
But when I try to consume the message I get following:
$ php bin/console messenger:consume-messages amqp
Attempted to load class "AMQPConnection" from the global namespace.
Did you forget a "use" statement for "PhpAmqpLib\Connection\AMQPConnection"?
The console command calls a method within AmqpFactory.php
public function createConnection(array $credentials): \AMQPConnection
{
return new \AMQPConnection($credentials);
}
So when I run the project from the browser, everything works fine. I can use AMQPConnection and all. But when running from terminal, it cannot find the AMQPConnection class.
From within my composer.json I also have the amqplib installed
"php-amqplib/php-amqplib": "^2.7",
I use Docker and the Dockerfile contains:
FROM php:7-apache
RUN usermod -u 1000 www-data &&\
a2dissite 000-default &&\
apt-get update &&\
apt-get install -y \
zlib1g-dev \
libicu-dev \
g++ \
libfreetype6-dev \
libssh-dev \
libjpeg62-turbo-dev \
libmcrypt-dev \
librabbitmq-dev \
libpng-dev &&\
docker-php-ext-configure intl &&\
docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ &&\
docker-php-ext-install -j$(nproc) gd pdo_mysql intl opcache zip pcntl exif bcmath sockets &&\
a2enmod rewrite
RUN pecl install amqp \
&& docker-php-ext-enable amqp
COPY docker/apache2.conf /etc/apache2/apache2.conf
WORKDIR /var/www/project
UPDATE!
I've printed the phpinfo() and when dispatching the message I have version 7.2.8 and when executing the terminal command I have 7.2.7. So terminal is not using the Docker instance of PHP when executing the command.

Answer 1

Solved this, finally. I had no idea I had to go via Docker to run this command. This worked for me:
docker exec -ti container_name sh -c "cd /var/www/project/ && php bin/console messenger:consume-messages amqp"

Answer 2

When using Docker, Symfony commands needs to be executed inside needed container.
The problem come from trying to execute php from the local host:
$ php bin/console messenger:consume-messages amqp
whereas the local host does not have the necessary dependencies, RabbitMQ in this case.
Instead the command should be run using the right container:
$ docker exec -ti container_name sh -c "cd /var/www/project/ && php bin/console messenger:consume-messages amqp"
container_name being the name of the container having the RabbitMQ dependencies.

Answer 3

You are missing package librabbitmq4 in your Docker container. Add RUN apt-get update --fix-missing && apt-get update && apt-get install php-amqp to your Dockerfile and rebuild the image.