imap_fetchheader
(PHP 4, PHP 5, PHP 7, PHP 8)
imap_fetchheader — Returns header for a message
說明
imap_fetchheader(IMAP\Connection
$imap, int $message_num, int $flags = 0): string|falseThis function causes a fetch of the complete, unfiltered » RFC2822 format header of the specified message.
參數
-
imap -
IMAP\Connection 實例。
-
message_num -
The message number
-
flags -
The possible
flagsare:-
FT_UID- Themessage_numargument is a UID -
FT_INTERNAL- The return string is in "internal" format, without any attempt to canonicalize to CRLF newlines -
FT_PREFETCHTEXT- The RFC822.TEXT should be pre-fetched at the same time. This avoids an extra RTT on an IMAP connection if a full message text is desired (e.g. in a "save to local file" operation)
-
返回值
Returns the header of the specified message as a text string, 或者在失敗時返回 false.
更新日誌
| 版本 | 說明 |
|---|---|
| 8.1.0 |
現在 imap 參數接受 IMAP\Connection
實例，之前接受 資源(resource)。
|