(PHP 5, PHP 7)
iconv_mime_decode — Decodes a MIME header field
$encoded_header
   [, int $mode = 0
   [, string $charset = ini_get("iconv.internal_encoding")
  ]] )Decodes a MIME header field.
encoded_headerThe 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.
       
| 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.
      
   Returns a decoded MIME field on success,
   or FALSE if an error occurs during the decoding.
  
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");
?>