How to get emails from 'Sent Items' folder imap php library?

Question

PHP

Good day.
The task is to implement the functionality of viewing incoming mail and deleting letters using POP3 or IMAP.
The code for connecting to the server wrote letters open, but only from the inbox.
Tell me how you can get to the sent folder?
PS I tried to change the values ​​specifying the folder to connect, without success the list is empty.
imap_open("{imap.server:993/imap/ssl} Sent ",email , pass);