Symfony: How to use configuration parameters in a service class?

Question

I want to use the parameters in parameters.yml in my service class mailer but I got this error while instantiate the mailer class:

$mailer = new Mailer();

knowing that the parameters are defined in parameters.yml:

Warning: Missing argument 1 for AppBundle\Service\Mailer::__construct(), called in

namespace AppBundle\Service


class Mailer
{
private $mailer_user;
private $mailer_password;
private $mailer_name;
private $mailer_host;
public function __construct($mailer_user, $mailer_password ,$mailer_name ,$mailer_host)
{
    $this->mailer_name = $mailer_user;
    $this->mailer_password = $mailer_password;
    $this->mailer_user = $mailer_name;
    $this->mailer_host = $mailer_host;
}
//.....
}

services.yml:

mailer:
    class:    'AppBundle\Service\Mailer'
    arguments:    [%mailer_user%, %mailer_password% ,%mailer_name% ,%mailer_host%]

You should specify what error you get (some exception or what?) because "doesnt work" is not enought. PS: you should remove the dollar sign from the parameter value and from the service argument %$mailer_host% (is this a typo?). — gp_sflover
– gp_sflover, Commented Aug 15, 2017 at 16:28
@gp_sflover is it the right way to do it ? error =>Whoops, looks like something went wrong. — Achraf
– Achraf, Commented Aug 15, 2017 at 16:32
Why are you repeating the mailer parameters in services.yml? Or is that just some kind of copy/paste thing? — Cerad
– Cerad, Commented Aug 15, 2017 at 17:13
@Cerad thanks again for your help i removed the repaeated parametrs but i got a new error if you can help me — Achraf
– Achraf, Commented Aug 16, 2017 at 8:47
@Achraf you should not change the question when it has been resolved (with a novice it could be a never-ending question :-)) but open a new one for each NEW issue. — gp_sflover
– gp_sflover, Commented Aug 16, 2017 at 9:31

gp_sflover · Accepted Answer · 2017-08-16 10:39:07Z

1

To learn "how can I use the parameters in parameters.yml in my service class" (and to see how a service can be used in a Symfony app) just read the Symfony docs paying attention to the Symfony version of the documentation you are reading:

BTW you should never instanciate a service class directly like you did:

$mailer = new Mailer();

but retrieve the service instance from the Service Container (Symfony will take care to automatically inject all the configured dependancies) like we usually do in a Controller (the example below access the Service using the shortcode provided extending the base Controller provided by the FrameworkBundle included in the Symfony standard version):

$mailer = $this->container->get('mailer');

edited Aug 16, 2017 at 10:39

answered Aug 16, 2017 at 10:26

gp_sflover

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1 Comment

Douwe Over a year ago

This was solid advice while it lasted, however using '$this->container->get('mailer')' is deprecated now and is dropped in symfony 4. They want you to use DI in stead.

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