Arno questions

Arno answers

• RabbitMQ - How to check if queue is empty?
• Installed elastic search on server but cannot connect to it if from another machine
• PhpStorm Codeception run arguments
• Unable to pass parameter to service in Symfony 3.3
• PHP sem_get function fails
• Using parameter placeholders in codeception.yml
• Dynamic service id in an argument in symfony2?
• Symfony 2 w/ PhpUnit 3.6 : changing target hostname for test purposes
• Symfony web test case JSON
• Composer won't install "require-dev" packages