Tests

iterable

The iterable test checks if a variable is an array or a traversable object.

{# evaluates to true if the foo variable is iterable #}
{% if users is iterable>
  {% for user in users %}
    Hello {{ user }}!
  {% endfor %}
{% else %}
  {# users is probably a string #}
  Hello {{ users }}!
{% endif %}

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even

The even test returns true if the given number is even.

null

The null test returns true if the variable is null.