Module development and code questions

I want to override function from a module, I searched for it many places but could not found the resolution,

I am using drupal 7 version.

I'm creating a custom entity configuration, everything is fine except the #default_values" property isn't working. I've tried several ways to solve it buy nothing has worked.

The fields that are not working are those that are inside the cycle for: 'width', 'height' and 'device'

Attached my Php code.

I have an admin form which is getting data for a static page. Suppose the form is getting details for a professional. Professional has multiple fields like personal info, contact info, expertise info etc.

Now my feature is to work on contact info, if the professional has multiple offices in his contact info then we have to get all the office info and allow the admin to set priority for the offices to render them accordingly.

What I have done is:

Hi 

We have a requirement to calculate PEM certificate thumbprint in drupal theme or custom module in a hook. But, I haven't got any clue if there are any standard functions for this. Please advise.

Thanks.

I had the following experience.

Hi,

I use drupal 8 and I try to create notifications after node insert and comment insert.

I create a module which set the fields in the message content :