How do I solve the problem below in drupal 8

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1.00/5 (2 votes)

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Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'restaurant_zymphonies_theme_settings_form_submit' not found or invalid function name in Drupal\Core\Form\FormSubmitter->executeSubmitHandlers() (line 114 of core/lib/Drupal/Core/Form/FormSubmitter.php).

What I have tried:

I tried to create the function:

function restaurant_zymphonies_theme_form_system_theme_settings_submit($form, &$form_state) {
  
}

but am still facing the same error when i submit a file for the sildeshow.

Posted 25-Mar-21 2:45am

Member 13457620

Updated 25-Mar-21 3:11am

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Richard Deeming · Accepted Answer · 2021-03-25T03:11:00

Solution 1

Look at the error message. Now look at your function name. Back to the error message. And back to your function name again.

Do you see the problem yet?

Quote:
function 'restaurant_zymphonies_theme_settings_form_submit' not found
function restaurant_zymphonies_theme_form_system_theme_settings_submit ...

Aside from the fact that they both start with restaurant_zymphonies_theme_ and end with _submit, the function you've created does not match the name of the missing function.

Posted 25-Mar-21 3:11am

Richard Deeming

v2

Comments

Member 13457620 7-Apr-21 18:43pm

how do i solve this error in drupal 8

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'restaurant_zymphonies_theme_settings_form_submit' not found or invalid function name in Drupal\Core\Form\FormSubmitter->executeSubmitHandlers() (line 114 of core/lib/Drupal/Core/Form/FormSubmitter.php)

Richard Deeming 8-Apr-21 3:25am

Read the error message again. Or read my solution again.

Either way, you are still trying to use a function which you have not defined.