How to Inject Variables into all Templates (i.e. Global Variables)
How to Inject Variables into all Templates (i.e. Global Variables)¶
Sometimes you want a variable to be accessible to all the templates you use.
This is possible inside your app/config/config.yml file:
- YAML
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# app/config/config.yml twig: # ... globals: ga_tracking: UA-xxxxx-x
- XML
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<!-- app/config/config.xml --> <twig:config ...> <!-- ... --> <twig:global key="ga_tracking">UA-xxxxx-x</twig:global> </twig:config> - PHP
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// app/config/config.php $container->loadFromExtension('twig', array( // ... 'globals' => array( 'ga_tracking' => 'UA-xxxxx-x', ), ));
Now, the variable ga_tracking is available in all Twig templates:
1 | <p>The google tracking code is: {{ ga_tracking }}</p>
|
It's that easy! You can also take advantage of the built-in Service Parameters system, which lets you isolate or reuse the value:
1 2 3 | # app/config/parameters.yml
parameters:
ga_tracking: UA-xxxxx-x
|
- YAML
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# app/config/config.yml twig: globals: ga_tracking: "%ga_tracking%"
- XML
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<!-- app/config/config.xml --> <twig:config ...> <twig:global key="ga_tracking">%ga_tracking%</twig:global> </twig:config> - PHP
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// app/config/config.php $container->loadFromExtension('twig', array( 'globals' => array( 'ga_tracking' => '%ga_tracking%', ), ));
The same variable is available exactly as before.
More Complex Global Variables¶
If the global variable you want to set is more complicated - say an object -
then you won't be able to use the above method. Instead, you'll need to create
a Twig Extension and return the
global variable as one of the entries in the getGlobals method.
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.