📜  如果变量被定义 twig - 任何代码示例

📅  最后修改于: 2022-03-11 14:59:51.139000             🧑  作者: Mango

代码示例1
{# 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 %}