iconv_mime_decode

(PHP 5, PHP 7, PHP 8)

iconv_mime_decode — Decodes a MIME header field

Descrizione

iconv_mime_decode(string $string, int $mode = 0, ?string $encoding = null): string|false

Decodes a MIME header field.

Elenco dei parametri

string

The encoded header, as a string.

mode

mode determines the behaviour in the event iconv_mime_decode() encounters a malformed MIME header field. You can specify any combination of the following bitmasks.

Bitmasks acceptable to **iconv_mime_decode()**
Value	Constant	Description
1	ICONV_MIME_DECODE_STRICT	If set, the given header is decoded in full conformance with the standards defined in » RFC2047. This option is disabled by default because there are a lot of broken mail user agents that don't follow the specification and don't produce correct `MIME` headers.
2	ICONV_MIME_DECODE_CONTINUE_ON_ERROR	If set, iconv_mime_decode_headers() attempts to ignore any grammatical errors and continue to process a given header.

encoding

The optional encoding parameter specifies the character set to represent the result by. If omitted or null, iconv.internal_encoding will be used.

Valori restituiti

Returns a decoded MIME field on success, or false if an error occurs during the decoding.

Log delle modifiche

Versione	Descrizione
8.0.0	`encoding` is nullable now.

Esempi

Example #1 iconv_mime_decode() example

<?php
// This yields "Subject: Prüfung Prüfung"
echo iconv_mime_decode("Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=",
                       0, "ISO-8859-1");
?>

Vedere anche:

iconv_mime_decode_headers() - Decodes multiple MIME header fields at once
mb_decode_mimeheader() - Decode string in MIME header field
imap_mime_header_decode() - Decode MIME header elements
imap_base64() - Decode BASE64 encoded text
imap_qprint() - Convert a quoted-printable string to an 8 bit string

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User Contributed Notes 3 notes

down

Dirk Becker ¶

11 years ago

While creating a new webmailer, I had to coop with a lot of mails and only half of them were correct encoded!
Often the text is tagged as ISO but in real its UTF :/

After trying a lot of solutions and combination a found a way which seems to work for all our mails. Maybe its usefull to someone else too.

<?php

    function mime_encode($data)
    {
        $resp = imap_utf8(trim($data));

        if(preg_match("/=\?/", $resp))
            $resp = iconv_mime_decode($data, ICONV_MIME_DECODE_CONTINUE_ON_ERROR, "ISO-8859-15");

        if(json_encode($resp) == 'null')
            $resp = utf8_encode($resp);

        return $resp;
    }

?>

down

koronci at aol dot com ¶

12 years ago

A simple and working solution for latin encoding supports Slovak, Czech, Russian ect. 

<?php iconv("utf-8", "windows-1250", $SomeWeirdText); ?>



specially for those who strugle with imap_mime_header_decode

down

dido dot sevilla at gmail dot com ¶

19 years ago

In PHP versions that have imap_mime_decode built in, it's possible to emulate the operation of this function:

<?php
function iconv_mime_decode($str, $mode=0, $charset="UTF-8")
{
    $data = imap_mime_header_decode($str);
    if (count($data) > 0) {
      // because iconv doesn't like the 'default' for charset
      $charset = ($data[0]->charset == 'default') ? 'ASCII' : $data[0]->charset;
      return(iconv($charset, $charset, $data[0]->text));
    }
    return("");
 }
?>

I've only tried to use this code snippet to decode ISO-2022-JP messages to UTF-8, but I see no reason why it shouldn't work in other cases.

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