PHP 8.4.0 RC2 available for testing

imap_fetchheader

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

imap_fetchheaderReturns header for a message

Descrição

imap_fetchheader(IMAP\Connection $imap, int $message_num, int $flags = 0): string|false

This function causes a fetch of the complete, unfiltered » RFC2822 format header of the specified message.

Parâmetros

imap

Uma instância de IMAP\Connection.

message_num

The message number

flags

The possible flags are:

  • FT_UID - The message_num argument is a UID
  • FT_INTERNAL - The return string is in "internal" format, without any attempt to canonicalize to CRLF newlines
  • FT_PREFETCHTEXT - The RFC822.TEXT should be pre-fetched at the same time. This avoids an extra RTT on an IMAP connection if a full message text is desired (e.g. in a "save to local file" operation)

Valor Retornado

Returns the header of the specified message as a text string, ou false em caso de falha.

Registro de Alterações

Versão Descrição
8.1.0 O parâmetro imap agora espera uma instância de IMAP\Connection; anteriormente, um resource imap válido era esperado.

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User Contributed Notes 2 notes

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7
rgagnon24 dot nospam at gmail dot com
14 years ago
Interesting that imap_headerinfo() does not allow a UID for the $msg_number field like all other fetching functions seem to allow.

If you want to use a UID to fetch the headers, use this two-step process:

<?php
/*
* assumes $mbox is your stream, and $uid is set
* properly. Proper error checking is up to you.
*/
$hText = imap_fetchbody($mbox, $uid, '0', FT_UID);
$headers = imap_rfc822_parse_headers($hText);
?>

The result is the same as the output of imap_headerinfo(), but you get to use the UID.
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3
Jille at nomorecrap dot quis dot cx
16 years ago
<?PHP
$headers
=imap_fetchheader($imap, $msgid);
preg_match_all('/([^: ]+): (.+?(?:\r\n\s(?:.+?))*)\r\n/m', $headers, $matches);
?>

Works quite well for splitting headers,
$matches will contain 3 arrays:
$matches[0] are the full-lines (To: Jille@devnull.quis.cx\r\n)
$matches[1] will be the header (To)
$matches[2] will be the value (Jille@devnull.quis.cx)

In multi-line values the 'multilining is not stripped!'
this could be achieved with something like:
<?PHP
preg_replace
('/\r\n\s+/m', '', $matches[2]);
?>
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