imap_headerinfo

(PHP 4, PHP 5, PHP 7, PHP 8)

imap_headerinfo — Read the header of the message

说明

imap_headerinfo(
    IMAP\Connection $imap,
    int $message_num,
    int $from_length = 0,
    int $subject_length = 0
): stdClass|false

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

参数

imap: IMAP\Connection 实例。
message_num: The message number
from_length: Number of characters for the fetchfrom property. Must be greater than or equal to zero.
subject_length: Number of characters for the fetchsubject property Must be greater than or equal to zero.
defaulthost

返回值

Returns false on error or, if successful, 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 from_length characters
fetchsubject - subject line formatted to fit subject_length characters

更新日志

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 `imap` resource。
8.0.0	The unused `defaulthost` parameter has been removed.

参见

imap_fetch_overview() - Read an overview of the information in the headers of the given message

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了解如何改进此页面 • 提交拉取请求 • 报告一个错误

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用户贡献的备注 5 notes

down

andyltm ¶

14 years ago

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.

down

jahservant 13 at gmail dot com ¶

15 years ago

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....

down

php at our-software dot com ¶

7 years ago

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.

down

scott at fuzzygroup dot com ¶

22 years ago

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

down

Murray ¶

9 years ago

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;

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备份地址：http://www.lvesu.com/blog/php/function.imap-headerinfo.php