(PHP 4, PHP 5, PHP 7, PHP 8)
imap_fetchheader — Returns header for a message
$imap, int $message_num, int $flags = 0): string|falseThis function causes a fetch of the complete, unfiltered » RFC2822 format header of the specified message.
imapIMAP\Connection 实例。
message_numThe message number
flags
The possible flags are:
FT_UID - The message_num
argument 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)
Returns the header of the specified message as a text string, 或者在失败时返回 false.
| 版本 | 说明 |
|---|---|
| 8.1.0 |
现在 imap 参数接受 IMAP\Connection
实例，之前接受 资源(resource)。
|