Module development and code questions

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Hello everyone,

I'm quite new to Drupal and developing a little Wizard for my company. But i do not get the number field to accept any floatingpoint values or the text field to validate, that my text is really a number.

I do know the question did not arrise the first time, but nothing i found could solve my problem.

First approach:

        $form[self::WARMMIETE] = array(
          '#type' => 'number',
            '#min' => 0,
            '#required' => TRUE,
            '#suffix' => '€',
        );

I'm trying to make a custom page created with hook_menu() and in the callback function, I need to get a variable with HTML code which is returned by a library I'm using. I tried getting it with page_callback_function($html) but page callback functions get variables from hook_menu arguments. How can I achieve this?

Sample code:

Hello, this might be a vague post, but will try my best.

I have a situation where we have one code base and multiple dev and test environment.

I am in a situation where the developers are claiming a particular heavily customized module function is displaying on one environment but not in the other. 

I checked and double checked and I am pulling the correct code from the correct git repo.

I also checked apache permissions and file and folder permissions. They seem all correct.

I cleared and re-cleared drupal caches

I added an event subscriber for add to cart event. There I defined a function to react on add to cart event. Everything works fine as my eventsubscriber is being called. I want to update the unit price of product which is being added to cart. Below is the code I used but it is not working. Price of the product is not updating to the price I am setting.

Hello I have create a module, I have create also the file field.storage.paragraph.parrados_description.yml,

I can assign the field with the UI.

But what I'm looking is to assign the field to the bundles programatically throught a form,  What is the method or function that let assign a field to a entity?

Thanks.

Oskar