(PHP 4, PHP 5, PHP 7, PHP 8)
imap_subscribe — Subscribe to a mailbox
$imap, string $mailbox): boolSubscribe to a new mailbox.
imapAn IMAP\Connection instance.
mailboxThe mailbox name, see imap_open() for more information
Passing untrusted data to this parameter is insecure, unless imap.enable_insecure_rsh is disabled.
   成功时返回 true, 或者在失败时返回 false。
  
| 版本 | 说明 | 
|---|---|
| 8.1.0 | The imapparameter expects an IMAP\Connection
  instance now; previously, a 资源(resource) was expected. |