imap_sort

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

imap_sort — メッセージヘッダの配列をソートする

説明

imap_sort(
    IMAP\Connection $imap,
    int $criteria,
    bool $reverse,
    int $flags = 0,
    ?string $search_criteria = null,
    ?string $charset = null
): array|false

指定したパラメータにより取得したメッセージ番号をソートします。

パラメータ

imap

IMAP\Connection クラスのインスタンス。

criteria

criteria は、次のどれかとします (ひとつのみ)。

SORTDATE - メッセージの日付
SORTARRIVAL - 到着日付
SORTFROM - 最初の From アドレスのメールボックス
SORTSUBJECT - メッセージ Subject
SORTTO - 最初の To アドレスのメールボックス
SORTCC - 最初の cc アドレスのメールボックス
SORTSIZE - メッセージのサイズ（バイト単位）

reverse

逆順にソートするかどうかを指定します。

flags

flags はビットマスクで、以下の組み合わせとなります。

SE_UID - シーケンス番号の代わりに UID を返す
SE_NOPREFETCH - 検索したメッセージを事前取得しない

search_criteria

IMAP2 フォーマットの検索条件文字列。詳細は imap_search() を参照ください。

charset

文字列の検索の際に使う MIME 文字セット。

戻り値

指定したパラメータでソートしたメッセージ番号の配列を返します。失敗した場合に false を返します

変更履歴

バージョン	説明
8.1.0	引数 `imap` は、IMAP\Connection クラスのインスタンスを期待するようになりました。これより前のバージョンでは、有効な `imap` リソースが期待されていました。
8.0.0	`reverse` の型が、int から bool に変更されました。
8.0.0	`search_criteria`, `charset` は、 nullable になりました。

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User Contributed Notes 7 notes

down

antoine dot spam-nono at maxg dot info ¶

18 years ago


I worked a lot with IMAP functions since I wrote a complete webmail and I've got a little tip about the imap_sort function :

There is a big difference between :

<?php
 imap_sort($imap, SORTDATE, 1);
// and 
 imap_sort($imap, SORTARRIVAL, 1);
?>

The first command will issue a
 >> FETCH 1:last (UID ENVELOPE BODY.PEEK[HEADER.FIELDS (Newsgroups Content-MD5 Content-Disposition Content-Language Content-Location Followup-To References)] INTERNALDATE RFC822.SIZE FLAGS)

While the second resulted in
 >> FETCH 1:last (UID INTERNALDATE RFC822.SIZE FLAGS)

As a result, using SORTDATE took 3 seconds longer to complete on a 800-emails mailbox, while the results are quite the same (except if you have to deal with forged dates or timezones, but the arrival order is far more logical)

My advice if you sort your emails by arrival is to actually use SORTARRIVAL, or better don't use imap_sort and go straight with message numbers (not UIDs). On large mailboxes, if you display messages per page, you will have significant performance increases (by avoiding 5 seconds of sorting).

down

boscolau at mac dot com ¶

19 years ago


in reply to graham_NOSPAM at rdb-concepts dot NOSPAM dot co dot uk here is a more elegant way to achieve sorting of search results:

function order_search($searchresults, $sortresults) {
    return array_values(array_intersect($sortresults,$searchresults));
}

example of using function:
   $sortresults = imap_sort($stream, $sort, $sortorder);
   $searchresults = imap_search($stream, $query);
   $sorted_search_results = order_search($searchresults, $sortresults);

sorted version of search results will then be held in the array of $sorted_search_results.

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persian-horde at metanetworking dot com ¶

19 years ago


imap_sort uses the c-client library to sort messages. This library currently does not 
support locale-based sort for foreign languages (Although it has charset option).
They are working on this(http://www.washington.edu/imap/IMAP-FAQs/#1.12),
but you can use the following function which uses strcoll() for locale-based sorting.
Pease note that this is required for SUBJECT field sorting, because most of 
other fields are sorted correctly by imap_sort in any locale:

function imap_locale_sort($stream,$criteria,$reverse,$locale,$options)
{
        if ($criteria!=SORTSUBJECT)
                return (imap_sort($stream,$criteria,$reverse,$options));

        $unsorted = array();
        $sortresult = array();

        $MC=imap_check($stream);
        $MN=$MC->Nmsgs;

        $overview = imap_fetch_overview($stream,"1:$MN",0);
        $k=0;
        while( list($key,$val) = each($overview))
        {
                $unsorted[$k]["uid"]=$val->uid;
                $unsorted[$k]["subject"]=MIME::decode($val->subject, NLS::getCharset());
                $k++;
        }
        usort ($unsorted, create_function('$a,$b','setlocale(LC_ALL,$locale);return strcoll($a["subject"],$b["subject"]);'));

        for ($m=0;$m<count($unsorted);$m++)
                array_push($sortresult,$unsorted[$m]["uid"]);

        if ($reverse)
                $sortresult = array_reverse($sortresult);

        return $sortresult;
}

Usage example:

$sorted = imap_locale_sort($stream,SORTSUBJECT,0,'fa_IR',0);

down

tilmauder at yahoo dot com ¶

20 years ago


in response to fprado's problem, the solution would be to use array_multisort() function on imap_fetchheader(). sdavey at datalink dot net dot au wrote an excellent example under array_multisort. I have used it to sort POP3 by message size. Unfortunately, my code is much too convoluted to post it here.

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-1

persian-horde at metanetworking dot com ¶

19 years ago


Hello,
We used MIME and NLS libraries in our previous code(imap_locale_sort) that
are part of PEAR and Horde projects, and so our function
was so specific. Here is the general (pure php) code for this
function:

function imap_locale_sort($stream,$criteria,$reverse,$locale,$options)
{
        if ($criteria!=SORTSUBJECT)
                return (imap_sort($stream,$criteria,$reverse,$options));

        $unsorted = array();
        $sortresult = array();

        $MC=imap_check($stream);
        $MN=$MC->Nmsgs;

        $overview = imap_fetch_overview($stream,"1:$MN",0);
        $k=0;
        while( list($key,$val) = each($overview))
        {
                $unsorted[$k]["uid"]=$val->uid;
                $unsorted[$k]["subject"]=imap_utf8($val->subject);
                $k++;
        }
        usort ($unsorted, create_function('$a,$b','setlocale(LC_ALL,$locale);return strcoll($a["subject"],$b["subject"]);'));

        for ($m=0;$m<count($unsorted);$m++)
                array_push($sortresult,$unsorted[$m]["uid"]);

        if ($reverse)
                $sortresult = array_reverse($sortresult);

        return $sortresult;
}

Sample usage:

$mbox = imap_open("{localhost:143}INBOX.sent-mail","userid","password");

if ($mbox)
    echo ("Connection Successful!");

$sorted = imap_locale_sort($mbox,SORTSUBJECT,0,'fa_IR',0);
print_r($sorted);
print ("\n\n");
$sorted = imap_sort($mbox,SORTSUBJECT,SE_UID);
print_r($sorted);

imap_close($mbox);

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-1

fprado at pmovil dot com dot br ¶

22 years ago


I use imap_sort() to go through POP3 accounts. However, sometimes, when the mailbox is too large, the response is incredibly slow.

I tried sniffing the network to discover the source of the problem and found that when imap_sort() is called for a POP3 server, it downloads the full body & attachs of ALL the messages in the mailbox. Since my POP server and my Web server are on differente machines, this caused the considerably slow response.

I've been trying a work-around this issue and if I manage to do this I'll post it here.

down

-3

graham_NOSPAM at rdb-concepts dot NOSPAM dot co dot uk ¶

22 years ago


for those of you with an old version of PHP that doesn't support the extra search paramater you may want to use this function:
function order_search($searchresults, $sortresults) {
    $searchhash = array();
    $returnresults = array();
    $count = 0;
    for ($i = 0; $i < sizeof($searchresults); $i++) {
        $searchhash[$searchresults[$i]] = true;
    }
    for ($i = 0; $i < sizeof($sortresults); $i++) {
        if (@$searchhash[$sortresults[$i]]) {
            $returnresults[$count] = $sortresults[$i];
            $count++;
        }
    }
    return $returnresults;
}

example of using function:
    $sortresults = imap_sort($stream, $sort, $sortdir, SE_UID);
    $searchresults = imap_search($stream, $search, SE_UID);
    $results = order_search($searchresults, $sortresults);

$results will then hold a sorted array of search results.

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