Fetch MIME headers for a particular section of the message

imap_fetchmime(
    IMAP\Connection $imap,
    int $message_num,
    string $section,
    int $flags = 0
): string|false

Fetch the MIME headers of a particular section of the body of the specified messages.

imap

IMAP\Connection 实例。

message_num

The message number

section

The part number. It is a string of integers delimited by period which index into a body part list as per the IMAP4 specification

flags

A bitmask with one or more of the following:

FT_UID - The message_num is a UID
FT_PEEK - Do not set the \Seen flag if not already set
FT_INTERNAL - The return string is in internal format, will not canonicalize to CRLF.

Returns the MIME headers of a particular section of the body of the specified messages 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。