(PHP 4, PHP 5, PHP 7, PHP 8)
imap_fetchheader — Returns header for a message
This function causes a fetch of the complete, unfiltered » RFC2822 format header of the specified message.
imap
IMAP\Connection 实例。
message_num
The 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,之前接受有效的 imap resource。 |