(PHP 4, PHP 5, PHP 7)
imap_headerinfo — Read the header of the message
$imap_stream
   , int $msg_number
   [, int $fromlength = 0
   [, int $subjectlength = 0
   [, string $defaulthost = NULL
  ]]] ) : objectGets information about the given message number by reading its headers.
imap_streamAn IMAP stream returned by imap_open().
msg_numberThe message number
fromlength
       Number of characters for the fetchfrom property.
       Must be greater than or equal to zero.
      
subjectlength
       Number of characters for the fetchsubject property
       Must be greater than or equal to zero.
      
defaulthost
   Returns FALSE on error or, if successful, the information in an object with following properties:
   
personal, adl,
      mailbox, and host
     
    personal, adl,
      mailbox, and host
     
    personal, adl,
      mailbox, and host
     
    personal, adl,
      mailbox, and host
     
    personal, adl,
      mailbox, and host
     
    personal, adl,
      mailbox, and host
     
    personal, 
      adl, mailbox, and 
      host
     
    R if recent and seen, N
      if recent and not seen, ' ' if not recent.
     
    U if not seen AND not recent, ' ' if seen
      OR not seen and recent
     
    F if flagged, ' ' if not flagged
     
    A if answered, ' ' if unanswered
     
    D if deleted, ' ' if not deleted
     
    X if draft, ' ' if not draft
     
    fromlength
      characters
     
    subjectlength characters