imap_fetchstructure
(PHP 4, PHP 5)
imap_fetchstructure — Read the structure of a particular message
Описание
object imap_fetchstructure
( resource $imap_stream
, int $msg_number
[, int $options
] )
Fetches all the structured information for a given message.
Список параметров
- imap_stream
-
An IMAP stream returned by imap_open().
- msg_number
-
The message number
- options
-
This optional parameter only has a single option, FT_UID, which tells the function to treat the msg_number argument as a UID.
Возвращаемые значения
Returns an object includes the envelope, internal date, size, flags and body structure along with a similar object for each mime attachment. The structure of the returned objects is as follows:
| type | Primary body type |
| encoding | Body transfer encoding |
| ifsubtype | TRUE if there is a subtype string |
| subtype | MIME subtype |
| ifdescription | TRUE if there is a description string |
| description | Content description string |
| ifid | TRUE if there is an identification string |
| id | Identification string |
| lines | Number of lines |
| bytes | Number of bytes |
| ifdisposition | TRUE if there is a disposition string |
| disposition | Disposition string |
| ifdparameters | TRUE if the dparameters array exists |
| dparameters | An array of objects where each object has an "attribute" and a "value" property corresponding to the parameters on the Content-disposition MIMEheader. |
| ifparameters | TRUE if the parameters array exists |
| parameters | An array of objects where each object has an "attribute" and a "value" property. |
| parts | An array of objects identical in structure to the top-level object, each of which corresponds to a MIME body part. |
| 0 | text |
| 1 | multipart |
| 2 | message |
| 3 | application |
| 4 | audio |
| 5 | image |
| 6 | video |
| 7 | other |
| 0 | 7BIT |
| 1 | 8BIT |
| 2 | BINARY |
| 3 | BASE64 |
| 4 | QUOTED-PRINTABLE |
| 5 | OTHER |
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Коментарии
the parts objects are identical in
structure to those returned by imap_fetchstructure, describing one subfolder each
parameters and dparameters are MIME-specific, theese contain the
extra parameters provided in the Content-Type and Content-Disposion Header lines such as Charset or Filename
Assuming $struct = imap_fetchstructure($x,$y);
It is important to note that if a message has NO attachements, $struct->parts is an empty array, and $struct->bytes has a value. If a message as ANY attachements, $struct->bytes ALWAYS = 0. To get the size of the primary body, you have to call structure->part[0]->bytes. To get the size of the whole message, either strlen(imap_body) or add up the ->bytes of all the parts.
Another interesting note:
When there is body text and no attachements:
count($struct->parts) = 0
When there is body text and 1 attachement:
count($struct->parts) = 2
These imap functions could really use better documentation. Like giving the meathods for the dparameter and parameter classes...
Point of clarification:
The seventh primary body type is not "Other" as documented, but actually "Model". This encompasses IGES, VRML, MESH, DWF, etc.
http://www.isi.edu/in-notes/iana/assignments/media-types/media-types
"Other" is the eigth primary body type.
I think the above note about attachments is wrong. I tested sending files with and without attachments and I get the following<br>with attachment: type=3 bytes=343648
no attachment: type=0 bytes=2
so checking for $struct->bytes == " " means nothing. At least in my test
running windows 2000, php4.2.1 using outlook and exchange. It seems that cheking the type will be more reliable
If you are getting CHARSET as US-ASCII even if the header has a Content-Type: field, make sure the header also has a MIME-Version: field.
For example, the following header will correcty report charset as KOI8-R
MIME-Version: 1.0
Content-Type: text/plain; charset="koi8-r"
Without the MIME-Version it will be reported as US-ASII
For people just beging this may help alot as I spent a couple hours just trying to relize how exact the array was stored. (at the time I did not know the print_r function :P)
$struct = imap_fetchstructure($mbox, $msgnumber);
print_r($struct);
Will give you a better example for your messages but they are called as $struct using the varible method above.
$struct->type; //would return the type
$struct->encoding //would return the encoding
and etc..
This can be done many different ways but that is the basics on pulling the info out of the structure of fetchstructure itself, I hope it helps someone starting because it wouldve helped me :/.
I think the following line (when building attachment information)
>>> "filename" => $parts[$i]->parameters[0]->value
needs to be
>>> "filename" => $parts[$i]->dparameters[0]->value
The first version generated a PHP warning under PHP 5.0.3. The second version actually gets the filename.
"Primary body type" of "unknown/unknown" will be int(9).Another comment to inform people about something that should really be in the function description:
imap_fetchstructure() downloads the entire email, attachments and all, rather than just the structure.
I guess it's an undocumented feature, not a bug.
I had assumed that the script would have only downloaded the amount of data that was returned, but my script downloaded a cumulative 2.5gig before i noticed. Hopefully no-one else will have this happen.
Here is code to parse and decode all types of messages, including attachments. I've been using something like this for a while now, so it's pretty robust.
<?php
function getmsg($mbox,$mid) {
// input $mbox = IMAP stream, $mid = message id
// output all the following:
global $charset,$htmlmsg,$plainmsg,$attachments;
$htmlmsg = $plainmsg = $charset = '';
$attachments = array();
// HEADER
$h = imap_header($mbox,$mid);
// add code here to get date, from, to, cc, subject...
// BODY
$s = imap_fetchstructure($mbox,$mid);
if (!$s->parts) // simple
getpart($mbox,$mid,$s,0); // pass 0 as part-number
else { // multipart: cycle through each part
foreach ($s->parts as $partno0=>$p)
getpart($mbox,$mid,$p,$partno0+1);
}
}
function getpart($mbox,$mid,$p,$partno) {
// $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
global $htmlmsg,$plainmsg,$charset,$attachments;
// DECODE DATA
$data = ($partno)?
imap_fetchbody($mbox,$mid,$partno): // multipart
imap_body($mbox,$mid); // simple
// Any part may be encoded, even plain text messages, so check everything.
if ($p->encoding==4)
$data = quoted_printable_decode($data);
elseif ($p->encoding==3)
$data = base64_decode($data);
// PARAMETERS
// get all parameters, like charset, filenames of attachments, etc.
$params = array();
if ($p->parameters)
foreach ($p->parameters as $x)
$params[strtolower($x->attribute)] = $x->value;
if ($p->dparameters)
foreach ($p->dparameters as $x)
$params[strtolower($x->attribute)] = $x->value;
// ATTACHMENT
// Any part with a filename is an attachment,
// so an attached text file (type 0) is not mistaken as the message.
if ($params['filename'] || $params['name']) {
// filename may be given as 'Filename' or 'Name' or both
$filename = ($params['filename'])? $params['filename'] : $params['name'];
// filename may be encoded, so see imap_mime_header_decode()
$attachments[$filename] = $data; // this is a problem if two files have same name
}
// TEXT
if ($p->type==0 && $data) {
// Messages may be split in different parts because of inline attachments,
// so append parts together with blank row.
if (strtolower($p->subtype)=='plain')
$plainmsg. = trim($data) ."\n\n";
else
$htmlmsg. = $data ."<br><br>";
$charset = $params['charset']; // assume all parts are same charset
}
// EMBEDDED MESSAGE
// Many bounce notifications embed the original message as type 2,
// but AOL uses type 1 (multipart), which is not handled here.
// There are no PHP functions to parse embedded messages,
// so this just appends the raw source to the main message.
elseif ($p->type==2 && $data) {
$plainmsg. = $data."\n\n";
}
// SUBPART RECURSION
if ($p->parts) {
foreach ($p->parts as $partno0=>$p2)
getpart($mbox,$mid,$p2,$partno.'.'.($partno0+1)); // 1.2, 1.2.1, etc.
}
}
?>
If you have errors with wrong attachment names like this:
correct name:
String -> Prüfbericht Hersteller.pdf
fetchstructure object name:
=?ISO-8859-1?Q?Pr=FCfbericht_Hersteller=2Epdf?=
Workaround to reconvert:
imap_mime_header_decode($fetchstructure->dparameters->value)[0]->text
imap_mime_header_decode($filename)[0]->text
If you logic based on compare structure strings, you must compare it case insensetive.
<?php
$p = imap_fetchstructure($this->_imap_resource, $mid);
//do not compare $p->disposition == 'INLINE'
if(preg_match('/inline/i', $p->disposition))
{
//this works
}
?>