如何在imap php中提取完整的邮件地址

Question

i use the below code to extract header details from the mail.. i could not get the mail address in from, to and cc as mentioned below..

$header = explode("\n", imap_fetchheader($mbox,$msgno));
echo "<br>";
    for ($i=1; $i<count($header); $i++)
    {
        echo $header[$i] . "<br>";
    }


output:

Delivered-To: user1@examplecom 
X-WM-Delivered: user1@example.com 
Received: from ElcotPC ([127.0.0.1]) 
(envelope-sender ) 
by 127.0.0.1 with ESMTP 
for ; Wed, 31 Jul 2013 09:14:19 +0530 
From: "user1" 
To: 
Cc: 
Subject: testing with attachment 
Date: Wed, 31 Jul 2013 09:14:18 +0530 

The "from","to", "cc" field are empty without the mail address..

i want the output like this..

 Delivered-To: user1@examplecom 
    X-WM-Delivered: user1@example.com 
    Received: from ElcotPC ([127.0.0.1]) 
    (envelope-sender ) 
    by 127.0.0.1 with ESMTP 
    for ; Wed, 31 Jul 2013 09:14:19 +0530 
    From: "user1" <user1@example.com>
    To: <user2@example.com>
    Cc: <user1@example.com>

how to get the email address to "from", "to" and "cc" field?

Answer 1

Update:
It's always best to use code that is readily available, so I checked if a imap-parsing function exists already. It does: imap_rfc822_parse_headers . Read the docs for details, and links to all sorts of imap_* functions. Perhaps imap_rfc822_parse_adrlist is exactly what you need?

---

A basic preg_match_all call could do the job, I think:

if (preg_match_all('/^\s*(From|To|Cc):[^<]*<([^>]+)\>/m',$string, $addresses)
{
    $addresses = array_merge($addresses[1], $addresses[2]);
    print_r($addresses);
}

Should output:

array (
    'From' => 'user1@example.com',
    'To' => 'user2@example.com',
    'Cc' => 'user1@example.com',
)

I think that's what you were looking for.
The regex explained:

• ^\\s* matches the start of the line, and zero or more whitespace chars
• (From|To|Cc) matches (and groups) From, To or Cc
• :[^<]*< : Matches (but doesn't group) the colon, and any char, except for the address delimiting <
• ([^>]+) : Mathces (and groups) everything after the < , that isn't >
• \\> : Can be left out, but matches address-delimiting >
• m : multi-line. If left out the leading ^ means start of string , now it means start of line

Notes: This expression doesn't deal with comma separated addresses or multiple addresses, and it might be usefull to call:

 filter_var($addresses['From'], FILTER_VALIDATE_EMAIL)

or use array_map to filter $addresses[2] prior to merging...