Question

我正在尝试循环保存数组的Php变量。我想在for循环var

的键中传递变量

假设看起来像这样：

       {% set fields_vars =["dogs","cats","birds"] %}
       {% set foo = 123 %}

       <select  id="my_filter_1" class=" form-control filters_space filter">

                 // my_filter needs to be increment automatically

              {%  for fields_var  in fields_vars %}

                   <option >{{ fields_vars [ foo //pass twig variable as key//  ]}}</option>                        

              {% endfor %}
       </select>

我无法获得将变量作为键传递的正确语法 - 我尝试过：

    <option >{{ fields_vars [ foo ]}}</option>        // Error            
    <option >{{ fields_vars [{{ foo }} ]}}</option>        // Error            
    <option >{{ fields_vars ['.'{{ foo }}'.' ]}}</option>        // Error

谢谢:)

Answer 1

语法为fields_vars [ foo ]。我在网上ifddle上给你一个例子

小提琴：https://twigfiddle.com/tdau2h

{% set fields_vars =["dogs","cats","birds"] %}
{% set foo = 123 %}


{# value #}
{% if foo in fields_vars %}
  {{ foo }} is in array {{ fields_vars|join(', ') }}
{% else %}
  {{ foo }} is not in array {{ fields_vars|join(', ') }}
{% endif %}

{# key #}
{% if fields_vars[foo] is defined %}
   key {{ foo }} is in array {{ fields_vars|join(', ') }}
{% else %}
  key {{ foo }} is not in array {{ fields_vars|join(', ') }}
{% endif %}

如何在Twig的for循环中使用变量作为键？

1 个答案: