imap_fetchheader
(PHP 4, PHP 5)
imap_fetchheader — Returns header for a message
说明
string imap_fetchheader
( resource $imap_stream
, int $msg_number
[, int $options
] )
This function causes a fetch of the complete, unfiltered » RFC2822 format header of the specified message.
参数
- imap_stream
-
An IMAP stream returned by imap_open().
- msg_number
-
The message number
- options
-
The possible options are:
- FT_UID - The msgno 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)
返回值
Returns the header of the specified message as a text string.
