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iconv_mime_decode_headersDecodes multiple MIME header fields at once


array iconv_mime_decode_headers ( string $encoded_headers [, int $mode = 0 [, string $charset = ini_get("iconv.internal_encoding") ]] )

Decodes multiple MIME header fields at once.



The encoded headers, as a string.


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

Bitmasks acceptable to iconv_mime_decode_headers()
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.


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

Return Values

Returns an associative array that holds a whole set of MIME header fields specified by encoded_headers on success, or FALSE if an error occurs during the decoding.

Each key of the return value represents an individual field name and the corresponding element represents a field value. If more than one field of the same name are present, iconv_mime_decode_headers() automatically incorporates them into a numerically indexed array in the order of occurrence.


Example #1 iconv_mime_decode_headers() example

= <<<EOF
Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=
Date: Thu, 1 Jan 1970 00:00:00 +0000
Message-Id: <>
Received: from localhost (localhost []) by localhost
    with SMTP id example for <>;
    Thu, 1 Jan 1970 00:00:00 +0000 (UTC)
Received: (qmail 0 invoked by uid 65534); 1 Thu 2003 00:00:00 +0000


$headers =  iconv_mime_decode_headers($headers_string0"ISO-8859-1");

The above example will output:

    [Subject] => Prüfung Prüfung
    [To] =>
    [Date] => Thu, 1 Jan 1970 00:00:00 +0000
    [Message-Id] => <>
    [Received] => Array
            [0] => from localhost (localhost []) by localhost with SMTP id example for <>; Thu, 1 Jan 1970 00:00:00 +0000 (UTC) (envelope-from
            [1] => (qmail 0 invoked by uid 65534); 1 Thu 2003 00:00:00 +0000


See Also

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User Contributed Notes 1 note

5 years ago
If you need lower-case header-names (as I read the documentation case is not guranteed) try something like


= <<<EOF
Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=
Date: Thu, 1 Jan 1970 00:00:00 +0000
Message-Id: <>
Received: from localhost (localhost []) by localhost
    with SMTP id example for <>;
    Thu, 1 Jan 1970 00:00:00 +0000 (UTC)
Received: (qmail 0 invoked by uid 65534); 1 Thu 2003 00:00:00 +0000


$headers iconv_mime_decode_headers($headers_string, 0, "ISO-8859-1");

$headers = array_combine(array_map("strtolower", array_keys($headers)), array_values($headers));

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