How to add value to Drupal Commerce 2 order information form?

Question

I am created a Drupal module and added the form alter function:

    MY_MODULE_form_alter(&$form, &$form_state, $form_id){
     if(($form_id === 'commerce_checkout_flow_multistep_default') &&
     ($form['#step_id'] === 'order_information')){

      $form['contact_information']['email']['#value'] = $email; // This is working

      ...

I also added this code:

$form['payment_information']['billing_information']['address'][0]['address']['given_name']['#value'] = $ime;
$form['payment_information']['billing_information']['address'][0]['address']['family_name']['#value'] = $prezime;
$form['payment_information']['billing_information']['address'][0]['address']['address_line1']['#value'] = $adresa;
$form['payment_information']['billing_information']['address'][0]['address']['postal_code']['#value'] = $ptt;
$form['payment_information']['billing_information']['address'][0]['address']['locality']['#value'] = $grad;

but this don't work for me. Any idea?

Answer 1

PHP does not expand simple quoted variables like '$grad' . Don't quote variables unless it is really necessary and in this case use double quotes : "$grad" . See PHP strings and variable expansion

Secondly, #value is used to set values that cannot be edited by the user. Use #default_value instead. See Drupal Form API