symfony - Creating my first twig extension to provide global variables to base templates -

i need populate variable html code , make available base.html.twig file.

to achive have made twig extension. first time using twig extentions im not sure if correct way of doing things.

here have far:

extension code:

class globalfooterextension extends \twig_extension {      public function getfilters()     {         return array(             new \twig_filter_function('globalfooter', array($this, 'globalfooter')),         );     }             public function globalfooter()     {          $globalfooter = file_get_contents('http://mysite.co.uk/footer/footer.html.twig');          return $globalfooter;      }       public function getname()     {         return 'globalfooter_extention';     }  } 

config.yml:

services:        imagine.twig.globalfooterextension:          class: imagine\gdmbundle\twig\globalfooterextension         tags:             - { name: twig.extension }  

base.html.twig:

{{globalfooter}} 

this give following error:

twig_error_runtime: variable "globalfooter" not exist in "imaginegdmbundle:default:product.html.twig" @ line 2 

im sure im missing obvious. how make $globalfooter globalfooterextension class available base.hmtl.twig file?

you want set global variable, not function.

just use getglobals , return variable:

class globalfooterextension extends \twig_extension {     public function getglobals()     {         return array(             "globalfooter" => file_get_contents('http://mysite.co.uk/footer/footer.html.twig'),         );     }      public function getname()     {         return 'globalfooter_extention';     } } 

or, if want lazy load value of variable, create function , change template to:

{{ globalfooter() }} 

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besides this, if footer file on same site, it's better use {% include '...' %} tag.