string imap_fetchbody(int imap_stream, int msg_number, string part_number, flags flags);
This function causes a fetch of a particular section of the body of the specified messages as a text string and returns that text string. The section specification is a string of integers delimited by period which index into a body part list as per the IMAP4 specification. Body parts are not decoded by this function.
The options for imap_fetchbody ()e a bitmask with one or more of the following
FT_UID - The msgono is a UID
FT_PEEK - Do not set the \Seen flag if not already set
FT_UID - The return string is in "internal" format, without any attempt to canonicalize CRLF