Twig

The flexible, fast, and secure
template engine for PHP

a Symfony Product
Docs Filters keys
Docs for Twig version 2.x
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⚠️ Version 2.x is not maintained.

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License

Twig documentation is licensed under the new BSD license.

keys

The keys filter returns the keys of an array. It is useful when you want to iterate over the keys of an array:

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{% for key in array|keys %}
    ...
{% endfor %}