imap_sort

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

imap_sortGets and sort messages

Descripción

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

Gets and sorts message numbers by the given parameters.

Parámetros

imap

An IMAP\Connection instance.

criteria

Criteria can be one (and only one) of the following:

reverse

Whether to sort in reverse order.

flags

The flags are a bitmask of one or more of the following:

  • SE_UID - Return UIDs instead of sequence numbers
  • SE_NOPREFETCH - Don't prefetch searched messages

search_criteria

IMAP2-format search criteria string. For details see imap_search().

charset

MIME character set to use when sorting strings.

Valores devueltos

Returns an array of message numbers sorted by the given parameters, o false en caso de error.

Historial de cambios

Versión Descripción
8.1.0 The imap parameter expects an IMAP\Connection instance now; previously, a valid imap recurso was expected.
8.0.0 reverse is now bool instead of int.
8.0.0 search_criteria and charset are now nullable.
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User Contributed Notes 1 note

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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).
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