Using sessions issue

I’m having problems with obtaining a value that starts as URL parameter.

I have a form on a page that is accessed by a url that has a parameter - product_id. I have used ‘Session storage manager to save this value in a Browser session. ( See screen shot )

browser_session1594×1396 323 KB

I need to use this value in the page that the form re-directs to. I need to use the value in a Server action. My understanding is I need to define the session… BUT WHERE?. I see I can define it from Globals/input/$_SESSION, but I can also define a session from API/input/$_SESSION. ( See screen shots )

api_session1524×1348 311 KB

globals_session1510×986 92.2 KB

So this is confusing me. The purpose of this is I need to use it in a database query as a condition value ( see screen shots )

condition_value1218×808 62.9 KB

query2066×1692 307 KB

and then values in from that query to be used in the Data insert below it. ( see screen shot )

insert2230×2120 403 KB

In the API action for the starter page I have used a set session to capture the value but i’m not sure this is correct.

I hope this make sense.

Thanks in advance!