在Twig中将变量值和键名与句号/句点进行比较

Question

My CakePHP view element for outputting a script tag has a variable called scriptsGroup with a value of, for example, main passed to it.

Twig:

{{ dump(scriptsGroup) }}

Output:

string(4) "main"

I also have the following view array called busters .

Twig:

{{ dump(busters) }}

Output:

object(stdClass)#134 (2) {
  ["public/js/build/main.js"]=>
  string(8) "7e9a1c32"
  ["public/css/main.css"]=>
  string(8) "d41d8cd9"
}

In Twig, how can I check that the script referred to by the scriptsGroup variable (in this case, main ) is in the busters array, and, if it is, output a script tag with the relevant hash in the filename.

Example of desired output:

<script src="/js/build/main_rev-7e9a1c32.js"></script>

I don't know how to deal with the array keys having full stops/periods and how to match the variable with the key of the array. I've tried the #{} interpolation syntax but am failing.

Update: I've tried using ~ :

{% if busters['public/js/build/' ~ scriptsGroup ~ '.js'] %}

gives Impossible to access a key "public/js/build/main.js" on an object of class "stdClass" that does not implement ArrayAccess interface .

Update 2: I realised I wasn't properly using PHP's json_decode function - it's now converting to an associative array so my new if condition is working. I just need to output the script tag now.

Answer 1

{% if busters['public/js/build/' ~ scriptsGroup ~ '.js'] %}
    <script src="/js/build/{{ scriptsGroup }}_rev-{{ busters['public/js/build/' ~ scriptsGroup ~ '.js'] }}.js"></script>
{% endif %}

It uses the [] and ~ operators .