constant

You are reading the documentation for Twig 2.x. Switch to the documentation for Twig 1.x, 3.x.

Warning Twig version 2.x is no longer maintained.

Questions & Feedback

Found a typo or an error?
Want to improve this document? Edit it.

Need support or have a technical question?
Ask support on Stack Overflow.

License

Twig documentation is licensed under the new BSD license.

`constant`

constant checks if a variable has the exact same value as a constant. You can use either global constants or class constants:

        1
2
3
        {% if post.status is constant('Post::PUBLISHED') %}
    the status attribute is exactly the same as Post::PUBLISHED
{% endif %}
    

You can test constants from object instances as well:

        1
2
3
        {% if post.status is constant('PUBLISHED', post) %}
    the status attribute is exactly the same as Post::PUBLISHED
{% endif %}
    