(PHP 5 >= 5.3.6, PHP 7, PHP 8)
imap_fetchmime — Fetch MIME headers for a particular section of the message
$imap,$message_num,$section,$flags = 0Fetch the MIME headers of a particular section of the body of the specified messages.
imapIMAP\Connection 实例。
message_numThe message number
sectionThe part number. It is a string of integers delimited by period which index into a body part list as per the IMAP4 specification
flagsA 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imapresource。 | 
