imap_getmailboxes()

(PHP 4, PHP 5, PHP 7)

Read the list of mailboxes, returning detailed information on each one

说明

imap_getmailboxes(resource $imap_stream,string $ref,string $pattern): array

Gets information on the mailboxes.

参数

$imap_stream

由imap_open()返回的 IMAP 流。

$ref

$refshould normally be just the server specification as described in imap_open()

Warning

Passing untrusted data to this parameter isinsecure, unlessimap.enable_insecure_rsh is disabled.

$pattern

指定在邮箱层级的何处开始查找。

在组成$pattern的字符中可使用两个特殊字符：'*'和'%'。'*'是指返回所有邮箱目录.如果将'*'作为$pattern参数时,则会返回整个邮箱层级结构。'%'是指只返回当前级次。'%'作为$pattern参数则只会返回顶层邮箱；'~/mail/%'用于UW_IMAPD则会返回名为~/mail的目录,但不包含其子目录。

返回值

Returns an array of objects containing mailbox information. Each object has the attributes$name, specifying the full name of the mailbox;$delimiter, which is the hierarchy delimiter for the part of the hierarchy this mailbox is in; and$attributes.$Attributesis a bitmask that can be tested against:

• LATT_NOINFERIORS- This mailbox not contains, and may not contain any "children"(there are no mailboxes below this one). Calling imap_createmailbox() will not work on this mailbox.

• LATT_NOSELECT- This is only a container, not a mailbox - you cannot open it.

• LATT_MARKED- This mailbox is marked. This means that it may contain new messages since the last time it was checked. Not provided by all IMAP servers.

• LATT_UNMARKED- This mailbox is not marked, does not contain new messages. If either MARKED or UNMARKED is provided, you can assume the IMAP server supports this feature for this mailbox.

• LATT_REFERRAL- This container has a referral to a remote mailbox.

• LATT_HASCHILDREN- This mailbox has selectable inferiors.

• LATT_HASNOCHILDREN- This mailbox has no selectable inferiors.

范例

Example #1 imap_getmailboxes() example

<?php
$mbox = imap_open("{imap.example.org}", "username", "password", OP_HALFOPEN)
      or die("can't connect: " . imap_last_error());
$list = imap_getmailboxes($mbox, "{imap.example.org}", "*");
if (is_array($list)) {
    foreach ($list as $key => $val) {
        echo "($key) ";
        echo imap_utf7_decode($val->name) . ",";
        echo "'" . $val->delimiter . "',";
        echo $val->attributes . "<br />\n";
    }
} else {
    echo "imap_getmailboxes failed: " . imap_last_error() . "\n";
}
imap_close($mbox);
?>

参见

• imap_getsubscribed()List all the subscribed mailboxes

i am currently develop a simple IMAP client, when i call imap_getmailboxes() i receive a different values in attributes property of the mailbox object the problem is how can i manipulate these attributes to get a meaningful value,
if you make a hard search to find a solution for this, you will
not find any useful documents for this problem, let us take a closer look for this problem.
when i call imap_getmailboxes() against different IMAP servers i got these attribute values
[attributes] => 9
[attributes] => 1
[attributes] => 64
[attributes] => 32
[attributes] => 40 
the documentation tell us that we check this attributes against four constants, these contents are
LATT_NOINFERIORS 
LATT_NOSELECT 
LATT_MARKED
LATT_UNMARKED
the value of these constants are 
LATT_NOINFERIORS = 1
LATT_NOSELECT = 2
LATT_MARKED = 4
LATT_UNMARKED = 8
you can got this result by echo each constant, unfortunately the documentation not explain how we can check the attributes against the constants, after a long time of searching i find the answer in source code of c-client 
(you can get the source from ftp://ftp.cac.washington.edu/imap/)
under \src\c-client you will find mail.h open it and you will find this
                /* terminal node in hierarchy */
#define LATT_NOINFERIORS (long) 0x1
        /* name can not be selected */
#define LATT_NOSELECT (long) 0x2
        /* changed since last accessed */
#define LATT_MARKED (long) 0x4
        /* accessed since last changed */
#define LATT_UNMARKED (long) 0x8
        /* name has referral to remote mailbox */
#define LATT_REFERRAL (long) 0x10
        /* has selectable inferiors */
#define LATT_HASCHILDREN (long) 0x20
        /* has no selectable inferiors */
#define LATT_HASNOCHILDREN (long) 0x40
as you notice here these are our four constants and three additional constants 
LATT_REFERRAL
LATT_HASCHILDREN
LATT_HASNOCHILDREN
then what is the value of these 3 attributes 
LATT_REFERRAL 0x10 = 00010000 in binary, the bitmask value is 2^4 = 16 and so on, or simply echo this constant to get the value, then
LATT_REFERRAL = 16
LATT_HASCHILDREN = 32
LATT_HASNOCHILDREN = 64
finally the full list of constants will be
LATT_NOINFERIORS = 1
LATT_NOSELECT = 2
LATT_MARKED = 4
LATT_UNMARKED = 8
LATT_REFERRAL = 16
LATT_HASCHILDREN = 32
LATT_HASNOCHILDREN = 64
ok let's back to our attributes 
[attributes] => 9
[attributes] => 1
[attributes] => 64
[attributes] => 32
[attributes] => 40 
[attributes] => 9 this mean it's LATT_UNMARKED and LATT_NOINFERIORS 1+8 =9
[attributes] => 1 this mean LATT_NOINFERIORS
[attributes] => 64 this mean LATT_HASNOCHILDREN
[attributes] => 32 this mean LATT_HASCHILDREN 
[attributes] => 40 this mean LATT_HASCHILDREN and LATT_UNMARKED 32+8=40
this just like linux file permission 7 mean read, write, and execute 4+2+1 read=4 write=2 execute=1
that is what i found, i hope this can help 
Mohamed Abbas
Nileweb Egypt

The list of mailbox attributes in this document is very misleading. In particular the explanation of noinferiors is just wrong. It does not mean that the mailbox currently has no children, it means that it *cannot* have children ever. Also, it is untrue that marked and unmarked are only used by UW-IMAP. They are in the official IMAP specification and are used by at least Courier-imap as well.
One thing to watch out for, however, is broken IMAP servers which do send \Noinferiors when they mean that there are currently no children.
From the IMAP4rev1 specs (RFC 2060):
   \Noinferiors
     It is not possible for any child levels of hierarchy to exist
     under this name; no child levels exist now and none can be
     created in the future.
   \Noselect
     It is not possible to use this name as a selectable mailbox.
   \Marked
     The mailbox has been marked "interesting" by the server; the
     mailbox probably contains messages that have been added since
     the last time the mailbox was selected.
   \Unmarked
     The mailbox does not contain any additional messages since the
     last time the mailbox was selected.

In case you print_r() or var_dump() the object and see an int for attribute, these are the constant integers for the bitmask.
1 LATT_NOINFERIORS
2 LATT_NOSELECT
4 LATT_MARKED
8 LATT_UNMARKED

i was looking for a function to test the attributes.
and it was hard to find an answer or code.
Maybe there is a function availeble, but i couldn't find it.
the first function: returns all mailboxes in on the server
The second function: returns a bitstring from the attr_number returned by getmailboxes()
The tirth function: returns an array with the active attributes on the specific mailbox
Last Line: is a combination of the functions: the output is, any map witch can hold no mail but only sub boxes...
<?php
function getFolders($mailbox, $serverString) {
  $list = imap_getmailboxes($mailbox, $serverString, "*");
  if (is_array($list)) {
    foreach ($list as $key => $val) {
      $mapname = str_replace($serverString, "", imap_utf7_decode($val->name));
      if ($mapname[0] != ".") {
        $list_folders[$key]['name'] = $mapname;
        $list_folders[$key]['delimiter'] = $val->delimiter;
        $list_folders[$key]['attributes'] = $val->attributes;
      }
      
    }
  } else {
    echo "imap_getmailboxes failed: " . imap_last_error() . "\n";
  }
  return $list_folders;
}
function IntToBin($number) {
  $BitWaarde = 1;
  $IntNum = $number;
  $BinString = "";
  if ($IntNum > 0) {
   
    // bepaal de max bitwaarde aan de hand van $IntNum
    while ($IntNum > $BitWaarde) {
      $BitWaarde = $BitWaarde * 2;
    }
   
   
   
    // maken van een binaire string.
    while ($BitWaarde >= 1 ) {
      if ($IntNum < $BitWaarde) {
        if ($BinString != "") $BinString .= "0";
      } else {
        $BinString .= "1";
        $IntNum = $IntNum-$BitWaarde;
      }
      $BitWaarde = $BitWaarde / 2;
    }
  
  }
  
  
  return $BinString;
}
function Attributes($BinString) {
  $BinInt = (int)$BinString;
  if ($BinInt >=1000){
    $setAttribute['LATT_UNMARKED'] = true;
    $BinInt = $BinInt-1000;
  } else $setAttribute['LATT_UNMARKED'] = false;
  if ($BinInt >=100){
    $setAttribute['LATT_MARKED'] = true;
    $BinInt = $BinInt-100;
  } else $setAttribute['LATT_MARKED'] = false;
  
  if ($BinInt >=10){
    $setAttribute['LATT_NOSELECT'] = true;
    $BinInt = $BinInt-10;
  } else $setAttribute['LATT_NOSELECT'] = false;
  
  if ($BinInt >=1){
    $setAttribute['LATT_NOINFERIORS'] = true;
    $BinInt = $BinInt-1;
  } else $setAttribute['LATT_NOINFERIORS'] = false;
  return $setAttribute;
}
foreach (getFolders($mailbox, $config['Server_string']) as $key => $val) {
            $Attr = Attributes(IntToBin((int)$val['attributes']));
            if (!$Attr['LATT_NOINFERIORS']) {
              echo "<option value='".$val['name']."'>".$val['name']."</option>";
            }
          }
?>

For the purposes of passing along the attributes as a json array, I wanted to pass the attributes as an indexed array to save on bandwidth and session storage. The human readable translation is then performed in javascript by relating each key to the proper attribute label. I also wanted a cleaner way of converting the attributes without calling another function or using a complex iteration. This puts each binary attribute into it's own array element for easy testing. 
<?php
$mailboxes = imap_getmailboxes($mailbox, $username, $password);
foreach($mailboxes as $key=>$mailbox){
  ...
  $attrs = preg_split('//',str_pad(decbin($mailbox->attributes),7,"0",STR_PAD_LEFT),8); // convert decimal to an array of attributes
  array_shift($attrs); // Remove the extra element at the front of the array in position 0
  ...
}
?>
With temporary variables, the conversion would look like this.
<?php
$attr_binary = decbin($mailbox->attributes); // convert decimal to binary
$attr_binary = str_pad($attr_binary,7,"0",STR_PAD_LEFT); // pad with 0's on the left
$attrs = $preg_split('//',$attr_binary,8); // split into an array after each character
array_shift($attrs); // Remove the extra element at the front of the array in position 0
?>
By defining the attributes as a map to the array index, you can test as follows.
<?php
define("ATTR_NOINFERIORS",6);
define("ATTR_NOSELECT "5);
define("ATTR_MARKED ",4);
define("ATTR_UNMARKED ",3);
define("ATTR_REFERRAL ",2);
define("ATTR_HASCHILDREN ",1);
define("ATTR_HASNOCHILDREN ",0);
if ($attrs[ATTR_HASCHILDREN]){
 // do something
}
?>