How to get a list of services programmatically in Symfony? - php

Question

I want to have a list of services and class names in my web application. I can use this command in console:
php bin/console debug:container
And I get something like this:
Symfony Container Public Services
=================================
-------------------------------------------------------------------- --------------------------------------------------------------------------------------------
Service ID Class name
-------------------------------------------------------------------- --------------------------------------------------------------------------------------------
annotation_reader Doctrine\Common\Annotations\CachedReader
app.annotations.softdelete.driver AppBundle\Doctrine\SoftDelete\Mapping\Driver\Annotation
app.annotations.translate.driver AppBundle\Doctrine\Mapping\Driver\TranslateDriver
app.be_auth_controller.listener AppBundle\EventListener\BeAuthControllerListener
I want to have this information on a web page using Symfony 3.
I created a service and I used:
$this->container->getServiceIds();
which returns something like:
[
0 => "service_container"
1 => "annotation_reader"
2 => "annotations.reader"
3 => "app.annotations.softdelete.driver"
4 => "app.annotations.translate.driver"
...
]
I don't know, how to get the class names.
In any cases works this:
get_class($this->container->get($this->container->getServiceIds()[1]))
But in some other cases it throws different exceptions.

Answer 1

To get full definition of given service you can use ContainerBuilder and Symfony cache file.
first create instance of ContainerBuilder:
$container = new ContainerBuilder();
then load cache file:
$cachedFile = $this->container->getParameter('debug.container.dump');
$loader = new XmlFileLoader($container, new FileLocator());
$loader->load($cachedFile);
now you can get full definition of your service like this:
$definition = $container->getDefinition('service_name')
$definition->getClass();

Answer 2

Your attempt with get_class is what came to mind as I was reading it, but whatever errors you are getting will come from improper fetching of those services. After all when you call $container->get(...), its at that moment instantiating those classes.
To be honest the output you are looking to replicate can be reproduced based on the method used by that command.
https://github.com/symfony/framework-bundle/blob/master/Command/ContainerDebugCommand.php
You'll just need to adapt it to work for you.