(PHP 4, PHP 5, PHP 7, PHP 8)
imap_num_msg — Gets the number of messages in the current mailbox
$imap): int|falseGets the number of messages in the current mailbox.
imapAn IMAP\Connection instance.
   Return the number of messages in the current mailbox, as an integer, or false on error.
  
| 版本 | 说明 | 
|---|---|
| 8.1.0 | The imapparameter expects an IMAP\Connection
  instance now; previously, a 资源(resource) was expected. |