Descriptionbool imap_delete ( int imap_stream, int msg_number [, int options])
imap_delete() marks messages listed in msg_number for deletion. The optional flags parameter only has a single option, FT_UID, which tells the function to treat the msg_number argument as a UID. Messages marked for deletion will stay in the mailbox until either imap_expunge() is called or imap_close() is called with the optional parameter CL_EXPUNGE.
Note: POP3 mailboxes do not have their message flags saved between connections, so imap_expunge() must be called during the same connection in order for messages marked for deletion to actually be purged.