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mb_decode_mimeheader does not handle separator #20674
Description
Description
if encoded Subject are too long they need to be separated the block by space ?= =? or line break, but mb_decode_mimeheader does not handle it correctly
The following code:
<?php
$subject = '=?us-ascii?Q?The_PH?= =?us-ascii?Q?P_8.5?=';
echo mb_decode_mimeheader($subject) ;PHP 8.3.21, 8.4.10 Result:
The PH P 8.5
PHP 8.0.30, 7.4.33 Result:
The_PHP_8.5
But I expected this output instead, as iconv_mime_decode does:
The PHP 8.5
PHP Version
8.3.21, 8.4.10
Operating System
Ubuntu 24.04
Activity
iluuu1994 commentedon Dec 9, 2025
/cc @alexdowad
Fix phpGH-20674 mb_decode_mimeheader does not handle separator
youkidearitai commentedon Dec 10, 2025
I create a commit this fix issue: youkidearitai@d29c866. @alexdowad what do you think?
youkidearitai commentedon Dec 10, 2025
In RFC2047
Should be separated by CRLF SPACE if 'encoded-word' is more than 75 characters.
Fix GH-20674 mb_decode_mimeheader does not handle separator
Fix phpGH-20674 mb_decode_mimeheader does not handle separator