SQLView | Create database view migrations

Is there any table in the SCCM database that returns all applications located in a subfolder ? This table returns all application and packages: "v_Package" but i need to filter only applications and only the ones in a specific subfolder. i also found the table "v_Applications" in my SQL server that returns only the applications but it is not present in the microsoft docs: https://docs.microsoft.com/en-us/mem/configmgr/develop/core/understand/sqlviews/application-management-views-configuration-manager is that normal ? Could someone point me in the right direction ?

Thank you very much

This error is only on my local development system where errors are enabled and otherwise the programming works fine but how can I get rid of the error?

This snippet is part of the code that generates a form semi-dynamically from the column names and the error is coming from addslashes($row[$val]) when an empty form is initially opened. Once the form has been populated with data, the error is gone but until then, each field gives the error at the top of the page.