Question

I am using Twig as a templating engine. However, I ran in a situation which definitely must be accomplishable in a simpler way than I have found.

What I have right now is this:

{% for myVar in someArray %}    
    {% set found = 0 %}
    {% for id, data in someOtherArray %}
         {% if id == myVar %}
              {{ myVar }} exists within someOtherArray.
              {% set found = 1 %} 
         {% endif %}
    {% endfor %}

    {% if found == 0 %}
        {{ myVar }} does not exist within someOtherArray.
    {% endif %}
{% endfor %}

What I am looking for is something more like this:

{% for myVar in someArray %}    
    {% if myVar is in_array(array_keys(someOtherArray)) %}
       {{ myVar }} exists within someOtherArray.
    {% else %}
       {{ myVar }} does not exist within someOtherArray.
    {% endif %}
{% endfor %}

Is there a way to accomplish this which I haven’t seen yet?

If I need to create my own extension, how can I access myVar within the test function?

Answer 1

You just have to change the second line of your second code-block from:

{% if myVar is in_array(array_keys(someOtherArray)) %}
# or
{% if myVar in someOtherArray|keys %}

in is the containment-operator, and keys, is a filter that returns an arrays keys.