defined
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Twig documentation is licensed under a
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Unported License.
definedΒΆdefined checks if a variable is defined in the current context. This is very
useful if you use the strict_variables option:
{# defined works with variable names #}
{% if foo is defined %}
...
{% endif %}
{# and attributes on variables names #}
{% if foo.bar is defined %}
...
{% endif %}
{% if foo['bar'] is defined %}
...
{% endif %}
When using the defined test on an expression that uses variables in some
method calls, be sure that they are all defined first:
{% if var is defined and foo.method(var) is defined %}
...
{% endif %}
