Select options from JSON file

Question

I have JSON file with some id and value, and this need to be populated in form as select list:

$form['select_item'] = [
      '#type' => 'select',
      '#options' => $list,
      '#title' => $this->t('Choose'),
      '#required' => TRUE,
    ];

What is the best way to approach this. Can I somehow convert this JSON in array or something and use it in options?

I would like to have this values form JSON in separate file and to use it from there.

Any idea?

Answer 1

Drupal doesn't have a lot to help with this, it's really a general PHP task.

If you're determined to use the API for it, just load the file data in any way you like (fopen, file_get_contents, etc), and use Json::decode() to turn it into an array.