PHP - Global/Instance Variable

Question

I'm writing a Command for a web app running on Symfony 2. A Command has a set structure and must be implemented as a Class with two set methods (configure & execute), plus any user-defined functions.

I want a few pre-defined variables that are accessible to all the functions, similar to how instance variable work in Java. How can I implement this in PHP?

Nicolai Fröhlich · Accepted Answer · 2013-06-16 19:01:30Z

2

This works using the DependencyInjection component. DI is what you're looking for!

When using symfony2 standard if you extend ContainerAwareCommand - symfony will inject the container automatically ...

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;

class MyCommand extends ContainerAwareCommand

.. configure container-parameters in parameters.yml or config.yml

parameters:
    my_parameter: my_value

then access your container-parameters using

 $this->container->getParameter('my_parameter')

This way you can access those parameters from any "service" in your application as long as you have access to the container. You can even inject only the parameters which is advised as injecting the whole container is costly in terms of performance and makes testing harder.

edited Jun 16, 2013 at 19:01

answered Jun 16, 2013 at 18:17

Nicolai Fröhlich

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1 Comment

DonCallisto Over a year ago

You're stealing my speciality tag, I'll never earn more reputation :P (+1)

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