(PHP 4, PHP 5)

imap_headerinfoRead the header of the message


object imap_headerinfo ( resource $imap_stream , int $msg_number [, int $fromlength = 0 [, int $subjectlength = 0 [, string $defaulthost = NULL ]]] )

Gets information about the given message number by reading its headers.

Список параметров


Поток IMAP, полученный из imap_open().


The message number


Number of characters for the fetchfrom property. Must be greater than or equal to zero.


Number of characters for the fetchsubject property Must be greater than or equal to zero.


Возвращаемые значения

Returns the information in an object with following properties:

  • toaddress - full to: line, up to 1024 characters
  • to - an array of objects from the To: line, with the following properties: personal, adl, mailbox, and host
  • fromaddress - full from: line, up to 1024 characters
  • from - an array of objects from the From: line, with the following properties: personal, adl, mailbox, and host
  • ccaddress - full cc: line, up to 1024 characters
  • cc - an array of objects from the Cc: line, with the following properties: personal, adl, mailbox, and host
  • bccaddress - full bcc: line, up to 1024 characters
  • bcc - an array of objects from the Bcc: line, with the following properties: personal, adl, mailbox, and host
  • reply_toaddress - full Reply-To: line, up to 1024 characters
  • reply_to - an array of objects from the Reply-To: line, with the following properties: personal, adl, mailbox, and host
  • senderaddress - full sender: line, up to 1024 characters
  • sender - an array of objects from the Sender: line, with the following properties: personal, adl, mailbox, and host
  • return_pathaddress - full Return-Path: line, up to 1024 characters
  • return_path - an array of objects from the Return-Path: line, with the following properties: personal, adl, mailbox, and host
  • remail -
  • date - The message date as found in its headers
  • Date - Same as date
  • subject - The message subject
  • Subject - Same as subject
  • in_reply_to -
  • message_id -
  • newsgroups -
  • followup_to -
  • references -
  • Recent - R if recent and seen, N if recent and not seen, ' ' if not recent.
  • Unseen - U if not seen AND not recent, ' ' if seen OR not seen and recent
  • Flagged - F if flagged, ' ' if not flagged
  • Answered - A if answered, ' ' if unanswered
  • Deleted - D if deleted, ' ' if not deleted
  • Draft - X if draft, ' ' if not draft
  • Msgno - The message number
  • MailDate -
  • Size - The message size
  • udate - mail message date in Unix time
  • fetchfrom - from line formatted to fit fromlength characters
  • fetchsubject - subject line formatted to fit subjectlength characters

Смотрите также


If you want to extract values from to, from, or other header elements, they are an object and you need to loop over them i.e.

$header = imap_header($mbox, $message_id);
$from = $header->from;
foreach ($from as $id => $object) {
    $fromname = $object->personal;
    $fromaddress = $object->mailbox . "@" . $object->host;

Would give you two variables for the friendly from and the smtp from address

Thanks to for help with this
2002-11-11 11:13:11
Simple little code for checking gmail using headerinfo

<?php /* Created on: 11/3/2008 By Ron Hickey 
Gmail mod for admin panels or you can edit it and convert html results to XML for personal RSS reader */ 

// enter gmail username below e.g.--> $m_username = "yourusername";
$m_username "";

// enter gmail password below e.g.--> $m_password = "yourpword";
$m_password "";

// enter the number of unread messages you want to display from mailbox or 
//enter 0 to display all unread messages e.g.--> $m_acs = 0; 
$m_acs 15

// How far back in time do you want to search for unread messages - one month = 0 , two weeks = 1, one week = 2, three days = 3,
// one day = 4, six hours = 5 or one hour = 6 e.g.--> $m_t = 6;
$m_t 2;

//----------->Nothing More to edit below
//open mailbox..........please
$m_mail imap_open ("{}INBOX"$m_username ""$m_password)

// or throw a freakin pig
or die("ERROR: " imap_last_error());

// unix time gone by or is it bye.....its certanly not bi.......or is it? ......I dunno fooker 
$m_gunixtp = array(2592000120960060480025920086400216003600);

// Date to start search
$m_gdmy date('d-M-Y'time() - $m_gunixtp[$m_t]); 

//search mailbox for unread messages since $m_t date 
$m_search=imap_search ($m_mail'UNSEEN SINCE ' $m_gdmy '');

//If mailbox is empty......Display "No New Messages", else........ You got mail....oh joy
if($m_search 1){ 
$m_empty "No New Messages";} 
else {

// Order results starting from newest message

//if m_acs > 0 then limit results
if($m_acs 0){ 

//loop it 
foreach ($m_search as $what_ever) { 

//get imap header info for obj thang 
$obj_thang imap_headerinfo($m_mail$what_ever);

//Then spit it out below.........if you dont swallow 
echo "<body bgcolor=D3D3D3><div align=center><br /><font face=Arial size=2 color=#800000>Message ID# " $what_ever "</font>

<table bgcolor=#D3D3D3 width=700 border=1 bordercolor=#000000 cellpadding=0 cellspacing=0>
<td><table width=100% border=0>
<td><table width=100% border=0>
<td bgcolor=#F8F8FF><font face=Arial size=2 color=#800000>Date:</font> <font face=Arial size=2 color=#000000>" 
date("F j, Y, g:i a"$obj_thang->udate) . "</font></td>
<td bgcolor=#F8F8FF><font face=Arial size=2 color=#800000>From:</font> <font face=Arial size=2 color=#000000>" 
$obj_thang->fromaddress "</font></td>
<td bgcolor=#F8F8FF><font face=Arial size=2 color=#800000>To:</font> <font face=Arial size=2 color=#000000>" 
$obj_thang->toaddress " </font></td>
</tr><tr><td bgcolor=#F8F8FF><font face=Arial size=2 color=#800000>Subject:</font> <font face=Arial size=2 color=#000000>" 
$obj_thang->Subject "</font></td></tr><tr>
</table><a href= target=_blank><font face=Arial size=2 color=#800000>Login to read message</a></font><br /></div></body>"

}} echo 
"<div align=center><font face=Arial size=4 color=#800000><b>" $m_empty "</b></font></div>";
//close mailbox bi by bye
2008-11-05 19:51:37
I had to pass the msgid as array($msgid) instead of an integer. the error "Invalid messageID" is generated if i pass an integer.
2009-01-27 12:57:05
I typically use UID's to identify messages, and recently discovered that the headers I had been pulling using this function and a message-number didn't match the UID's. Instead of worrying about it, I just began using imap_fetchheader() and imap_ rfc822_ parse_ headers() on its output. The only significant difference I immediately noticed was that there is no "udate" property, so I assigned one with the result of strtotime() on the 'date' property.

2009-05-17 13:56:52
I'm not entirely sure why this is, but if you loop through all of the messages in a mailbox, calling imap_header() each time, you can significantly increase performance by calling imap_headers() first.

Compare this:
$n_msgs imap_num_msg($imap);
$s microtime(true);
     for (
$i=0$i<$n_msgs$i++) {
$header imap_header($imap$i);
$e microtime(true);
     echo (
$e $s);

With this:
$n_msgs imap_num_msg($imap);
/****** adding this line: ******/
$s microtime(true);
     for (
$i=0$i<$n_msgs$i++) {
$header imap_header($imap$i);
$e microtime(true);
     echo (
$e $s);

The performance difference, as I have tested on several boxes, connecting to several different servers, is that the second code snippet ALWAYS takes 1/2 the time, if not less.

Perhaps it is because imap_headers() retrieves all of the messages on one connection, whereas imap_header() has to make a new fetch request for each message??  I'm not sure WHY it is faster if imap_headers() is called first, but I do know that it is, so I thought I'd pass on the knowledge.  If anyone knows why this is, please let me know....
2009-12-08 17:56:48
When i try to access the same mailbox through pop3 and through imap i get different update infomations.

1. Using imap 
header->udate is not the same as strtotime($header->date)
imap_open("{host:143/imap/novalidate-cert}INBOX}"$username$password); // open as imap
$header imap_header($mBox1); // get first mails header
echo $header->udate;

1. Using pop3
header->udate is the same as strtotime($header->date)
imap_open("{host:110/pop3/novalidate-cert}INBOX}"$username$password); // open as pop3
$header imap_header($mBox1); // get first mails header
echo $header->udate;

I do not know why this is so, but for this reason, i use strtotime($header->date) together with other values to create my own message-UID because this seems to work independent from the protocol.
2010-01-31 04:32:58
When I was testing imap_headerinfo() with an e-mail that had multiple recipients (multiple e-mails in to to: and/or cc: field), I noticed that imap_headerinfo() was failing hard for me on PHP 5.2.10-2ubuntu6.4 with Suhosin-Patch 0.9.7 (cli).

Rather than providing me an array with each and every e-mail address listed in the to and/or cc fields, it was only providing me the first listed.  This was disappointing.

   [to] => Array
            [0] => stdClass Object
                    [mailbox] => game
                    [host] =>

Luckily, there was a cool workaround to this problem:

imap_rfc822_parse_headers(imap_fetchheader( string ); which subsequentally worked like a nice little pet would:

   [to] => Array
            [0] => stdClass Object
                    [mailbox] => game
                    [host] =>
            [1] => stdClass Object
                    [mailbox] => dutch
                    [host] =>

So in other words, instead of imap_headerinfo() use imap_rfc822_parse_headers(imap_fetchheader()).

Hope this helps anyone else that runs into this issue from now into the future.  This post was suggested by people in #PHP on FreeNode IRC.
2010-07-08 18:17:02
I did some testing on using imap_headerinfo() function and I am very confused with the results.

On small mailboxes, getting data for 30 messages takes about 0.5 secs. On mailboxes with approximately 500 messages it takes about 7 secs to retrieve data for the same number of messages.

Why would the size of mailbox had anything to do with the time needed to retrieve the header of the single email message? Mailboxes are on the same account.

Next, If you measure every call to imap_headerinfo() function the result are even stranger! First and then every 22th call to the imap_headerinfo() function takes 10000 times more that the others. Example: the first call takes about 0.39 secs, then other 20 calls take about 0.0001 secs, then 22th call takes about 0.47 secs, then other 20 calls about 0.00004, and so on.

After some more research there is something else that came up.

If you use:

$message_header[$i] = imap_headerinfo($mbox, $i + 1);

it takes about 0.4 secs for every 22th call and about 0.0001 sec for other calls.

However, you would expect the same results with:

$message_header[$i] = imap_headerinfo($mbox, 30 - $i);

But, in this case it takes about 0.2 secs for every call!

The only difference here is that in the second example headers are retrieved in the reversed message order (from the 30th to the 1st) and for some reason it greatly affects the time needed for the operation. Strange, or is it just me?
2014-08-04 01:14:13
An email without a subject line will not generate the 'subject' property.

Before using the 'subject' property you should test for it.
if (property_exists($header, 'subject')) echo $header->subject;
2015-09-15 02:54:40
Please Note : imap_headerinfo only returns a subset of the headers, rather than the entire thing.

Among other things, this means it only shows the first recipient from the "to" section of the email, rather than all recipients.

If you're not seeing something you expected to, you'll be better off using

$hdr_raw = imap_fetchheader($mbox, $mailid);
$hdr = imap_rfc822_parse_headers($hdr_raw);

then you'll see the full set of headers, and be able to do more with it.
2017-03-13 16:57:29

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