iconv_mime_decode

(PHP 5)

iconv_mime_decode — Decodes a MIME header field

说明

string iconv_mime_decode ( string $encoded_header [, int $mode = 0 [, string $charset = ini_get("iconv.internal_encoding") ]] )

Decodes a MIME header field.

参数

encoded_header

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.

charset

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

返回值

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

范例

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");
?>

参见

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

PHP手册 - N: Decodes a MIME header field

用户评论:

dido dot sevilla at gmail dot com (09-Mar-2005 04:00)

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.