CODEWITHSUNDEEP
phptwigslimtwig-extension
Keust
Keust

Reputation: 15

How to use a variable in .twig syntax

I am to DRY in a twig template. I am wondering is you can access a variable in the {{ notation }} of twig.

For example:

{% if page.lang == 'en' %}
   // do something 
   {{ content_en }}
{% endif %}
{% if page.lang == 'es' %}
    // hacer algo 
    {{ content_es }}
{% endif %}

I tried some other approaches. But is it possible to (somehow) combine variables and do something like this:

// Php example
$var = 'content_';
$var .= page.lang;
// Output would be 'content_en';

But then for Twig?

// Something like 
{{ content_ + page.lang }}

To make it more clear. I would like to access to correct variable.

$content_en = 'this is just some content';
$content_es ='Alguna información';
$var = 'content_';
$var .= 'en';

$key = ${$var};
// Output is 'this is just some content'
echo $key;

Upvotes: 1

Views: 3137

Answers (2)

Keust
Keust

Reputation: 15

@Darabee.

You are correct, the syntax would be:

{{ attribute(_context, 'content_' ~ page.lang) }}

But how ever I noticed that if there is a array and u use '.' instead of a underscore '_' it will not work.

In my case I have a multi-array. That is the issue.

page['city']['content_en'].
or page.city.content_en

Upvotes: 0

DarkBee
DarkBee

Reputation: 15650

If you want to concatenate the output you need to use ~

{{ 'content_' ~ page.lang }}

If you want to call a dynamic variable you need to use attribute

{{ attribute(_context, 'content_' ~ page.lang) }}

_context is a special variable in twig which containts all variables you passed towards the template

Upvotes: 2

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