Questions about session and database in PHP

PHP session and database problems session database sessions

Excuse me
When I log on to the page, the session has obtained data in the database field.
Do I need to close the database connection when I keep the session status on the page?
Will the session be affected if the session is closed?

Reply to discussion (solution)

SESSION, stored in text, and database connection is irrelevant.
When the SESSION is stored in the database, the database connection is related.

That is to say
Can I close the database connection now?
If I want to perform session read/write operations on the database, do I need to open the database connection again?

Php operations on the database are not persistent connections. after the script is run, the database closes itself.