Module development and code questions

Security scan trying to manipulate form_build_id value to something else

e.g 

form_build_id manipulated from: form-i0JR1J8PhobAlL1_m6CQ8oHm02Ogf5Z-Gfd9XClh5PU to: form-i0JR1J8PhobAlL1_m6CQ8oHm02Ogf5Z-Gfd9XClh5PU%a5'%20having%201=1--%20

manages to produce sql stack trace on page (UI) showing details of Drupal's SQL entities/ tables

e.g.

I got an error after upgrading SMTP to 8.x-1.0, which caused smtp to fail to send mail. The error is as follows:

SMTP CONNECTION

SMTP module is enabled, turned on, but SmtpConnect() returned FALSE.

How do teachers solve it? Thank you!

In a content type, in addition to various fields, I have 4 numeric fields. For each single field I call the same callBack to perform a check. Is it possible, inside the callBack, to know which field has recalled the callBack?

I am working on an Critical Website. I want to not delete the Database if "Accidental Module uninstallation" happens. 

Which hook to use - to develop module, so that the database created does not get deleted by "Accidental Module Uninstallation"

We are implementing Auto-backup of Database tables through Cron job. But Also, want to implement Integrated feature - in worst case scenario if Module get deleted

Hi Guys,

Hi friends,
I have a doubt, i've created a REST with View and i formated like JSON, but the output is like this:

[
{"item1":"123","item2":"123","item3":"123","item4":"","item5":"123","item5":"123"},	{"item1":"345","item2":"345","item3":"345","item4":"","item5":"345","item5":"345"}
]

And i need something like this: