> When i try to use {% debug variablename %} in dev mode I get an
> "Unknown tag name 'debug'" message.

> Earlier threads suggest inserting the following in config_dev.yml:

> services:
>     twig.extension.debug:
>     class: Twig_Extensions_Extension_Debug
>     tags: [ { name: 'twig.extension' } ]

> see alsohttps://github.com/symfony/symfony-docs/issues/455

> But when I clear cache and then add those lines to my otherwise
> standard config_dev.yml I get this error message:

> ErrorException: Warning: array_key_exists() expects parameter 2 to be
> array, string given in C:\xampp\htdocs\SfAdrxDates\vendor\symfony\src
> \Symfony\Component\DependencyInjection\Loader\YamlFileLoader.php line
> 133

> What to I need to do to enable the debug tag in Twig in symfony 2.04?

>     twig.extension.debug:
>         class: Twig_Extensions_Extension_Debug
>         tags:
>             - { name: twig.extension }

> On 20 Okt., 18:31, otis <ovg...@adrexpedite.com> wrote:

> > I'm using symfony standard distribution ver 2.04.

> > When i try to use {% debug variablename %} in dev mode I get an
> > "Unknown tag name 'debug'" message.

> > Earlier threads suggest inserting the following in config_dev.yml:

> > services:
> >     twig.extension.debug:
> >     class: Twig_Extensions_Extension_Debug
> >     tags: [ { name: 'twig.extension' } ]

> > see alsohttps://github.com/symfony/symfony-docs/issues/455

> > But when I clear cache and then add those lines to my otherwise
> > standard config_dev.yml I get this error message:

> > ErrorException: Warning: array_key_exists() expects parameter 2 to be
> > array, string given in C:\xampp\htdocs\SfAdrxDates\vendor\symfony\src
> > \Symfony\Component\DependencyInjection\Loader\YamlFileLoader.php line
> > 133

> > What to I need to do to enable the debug tag in Twig in symfony 2.04?