imap_alerts
(PHP 4, PHP 5, PHP 7, PHP 8)
imap_alerts — Returns all IMAP alert messages that have occurred
說明
   imap_alerts(): array|false
  Returns all of the IMAP alert messages generated since the last imap_alerts() call, or the beginning of the page.
When imap_alerts() is called, the alert stack is subsequently cleared. The IMAP specification requires that these messages be passed to the user.
參數
此函式沒有參數。
返回值
   Returns an array of all of the IMAP alert messages generated or false if
   no alert messages are available.