iconv Functions
PHP Manual


(PHP 5, PHP 7)

iconv_mime_decodeDecodes a MIME header field


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

Decodes a MIME header field.



The encoded header, as a string.


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.


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

Return Values

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


Example #1 iconv_mime_decode() example

// This yields "Subject: Prüfung Prüfung"
echo iconv_mime_decode("Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=",

See Also

iconv Functions
PHP Manual