Bug #60494 [Opn->Ver]: iconv_mime_decode does ignore special characters

Edit report at https://bugs.php.net/bug.php?id=60494&edit=1 ID: 60494 Updated by: cmb@php.net Reported by: bin at webcandy dot at Summary: iconv_mime_decode does ignore special characters -Status: Open +Status: Verified Type: Bug Package: ICONV related Operating System: Windows 7 PHP Version: Irrelevant Block user comment: N Private report: N New Comment: iconv_mime_decode() is supposed to decode a MIME header according to RFC 2047. Neither 'ä', 'ö' nor 'ß' are valid characters in headers, so returning these characters unmodified would be wrong. However, it is not correct to simply skip invalid characters. Instead the function should fail (i.e. return FALSE). It seems the problem is that inside of _php_iconv_mime_decode() all calls to _php_iconv_appendc() ignore its return value (although all calls to _php_iconv_appendl() cater to it). In this case the culprit is: <https://github.com/php/php-src/blob/php-7.2.3/ext/iconv/iconv.c#L1538> Previous Comments: ------------------------------------------------------------------------ [2011-12-11 21:16:22] bin at webcandy dot at Expected result should probably have 2 bytes as I expect it to be UTF-8 when using iconv.output_encoding = UTF-8 Exptected result: ---------------- string(2) "ä" string(2) "ö" string(2) "ß" ------------------------------------------------------------------------ [2011-12-11 21:12:35] bin at webcandy dot at Description: ------------ If the string $text passed to iconv_mime_decode($text) does contain special characters (tested with ä, ü and ß), it will just return an empty character for these characters. In my opinion it iconv_mime_decode should leave special characters as they are as long as they're not encoded via Q-encoding. Tested on Windows 7 and Debian. iconv.output_encoding is set to "UTF-8" Test script: --------------- <?php var_dump(iconv_mime_decode('ä')); var_dump(iconv_mime_decode('ö')); var_dump(iconv_mime_decode('ß')); ?> Expected result: ---------------- string(1) "ä" string(1) "ö" string(1) "ß" Actual result: -------------- string(0) "" string(0) "" string(0) "" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60494&edit=1