imap_fetchheader

(PHP 4, PHP 5, PHP 7)

imap_fetchheader — Returns header for a message

说明

imap_fetchheader ( resource $imap_stream , int $msg_number [, int $options = 0 ] ) : string

This function causes a fetch of the complete, unfiltered » RFC2822 format header of the specified message.

参数

imap_stream

由 imap_open() 返回的 IMAP 流。

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.

参见

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