(PHP 4, PHP 5, PHP 7)
imap_last_error — Gets the last IMAP error that occurred during this page request
Gets the full text of the last IMAP error message that occurred on the current page. The error stack is untouched; calling imap_last_error() subsequently, with no intervening errors, will return the same error.
Returns the full text of the last IMAP error message that occurred on the
current page. Returns FALSE if no error messages are available.