IMAP 函数
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imap_headerinfo

(PHP 4, PHP 5)

imap_headerinfo — Read the header of the message

说明

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.

参数

imap_stream

由 imap_open() 返回的 IMAP 流。

msg_number

The 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

返回值

Returns the information in an object with following properties:

参见

IMAP 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Read the header of the message

用户评论:

andyltm (08-Jul-2010 11:17)

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] => blunts.com
                )
        )

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] => blunts.com
                )
            [1] => stdClass Object
                (  
                    [mailbox] => dutch
                    [host] => masters.com
                )
        )

TL;DR:
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.

trinkaus at ttNetz dot de (31-Jan-2010 10:32)

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)
<?php
$mBox = imap_open("{host:143/imap/novalidate-cert}INBOX}", $username, $password); // open as imap
$header = imap_header($mBox, 1); // get first mails header
echo $header->udate;
echo strtotime($header->date);
?>

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

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.

jahservant 13 at gmail dot com (08-Dec-2009 11:56)

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:
<?php
     $imap = imap_open("{my.server.com:143}INBOX", "user", "pass");
     $n_msgs = imap_num_msg($imap);
     $s = microtime(true);
     for ($i=0; $i<$n_msgs; $i++) {
          $header = imap_header($imap, $i);
     }
     $e = microtime(true);
     echo ($e - $s);
     imap_close($imap);
?>

With this:
<?php
     $imap = imap_open("{my.server.com:143}INBOX", "user", "pass");
     $n_msgs = imap_num_msg($imap);
  /****** adding this line: ******/
     imap_headers($imap)
  /***************************/
     $s = microtime(true);
     for ($i=0; $i<$n_msgs; $i++) {
          $header = imap_header($imap, $i);
     }
     $e = microtime(true);
     echo ($e - $s);
     imap_close($imap);
?>

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....

aeolianmeson at exoyiga dot blitzeclipse dot com (17-May-2009 06:56)

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.

Dustin

php at spacefish dot biz (27-Jan-2009 06:57)

I had to pass the msgid as array($msgid) instead of an integer. the error "Invalid messageID" is generated if i pass an integer.

ron at NOSPAM dot clicks2hits dot com (06-Nov-2008 01:51)

Simple little code for checking gmail using headerinfo

<?php /* Created on: 11/3/2008 By Ron Hickey 6tx.net/gmail_mod
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 ("{imap.gmail.com:993/imap/ssl}INBOX", $m_username . "@gmail.com", $m_password)

// or throw a freakin error............you 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(2592000, 1209600, 604800, 259200, 86400, 21600, 3600);

// 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
rsort($m_search);

//if m_acs > 0 then limit results
if($m_acs > 0){
array_splice($m_search, $m_acs);
}

//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>
<tr>
<td><table width=100% border=0>
<tr>
<td><table width=100% border=0>
<tr>
<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>
</table>
</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>
</tr>
</table></td>
</tr>
</table><a href=http://gmail.com 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>" . $m_empty . "</b></font></div>";
//close mailbox bi by bye
imap_close($m_mail);
?>

scott at fuzzygroup dot com (11-Nov-2002 05:13)

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 www.natrak.net for help with this