24 lines
484 B
ReStructuredText
24 lines
484 B
ReStructuredText
``constant``
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============
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``constant`` returns the constant value for a given string:
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.. code-block:: twig
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{{ some_date|date(constant('DATE_W3C')) }}
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{{ constant('Namespace\\Classname::CONSTANT_NAME') }}
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You can read constants from object instances as well:
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.. code-block:: twig
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{{ constant('RSS', date) }}
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Use the ``defined`` test to check if a constant is defined:
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.. code-block:: twig
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{% if constant('SOME_CONST') is defined %}
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...
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{% endif %}
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