Bug #62462 [Opn->Fbk]: quoted_printable_encode splits line in the middle of UTF8 character

Edit report at https://bugs.php.net/bug.php?id=62462&edit=1 ID: 62462 Updated by: stas@php.net Reported by: c2h5oh at poczta dot fm Summary: quoted_printable_encode splits line in the middle of UTF8 character -Status: Open +Status: Feedback Type: Bug Package: *Mail Related Operating System: Linux PHP Version: 5.3.14 Block user comment: N Private report: N New Comment: Could you explain why soft line breaks is a problem? The software decoding the QP string should ignore the linebreaks and reassemble the string in the original form. Quoting from https://en.wikipedia.org/wiki/Quoted-printable: A soft line break consists of an "=" at the end of an encoded line, and does not appear as a line break in the decoded text. So where the corruption of the utf-8 comes from? Previous Comments: ------------------------------------------------------------------------ [2012-07-02 11:42:51] c2h5oh at poczta dot fm Description: ------------ quoted_printable_encode adds, among other things, soft line breaks if line lenght is greater than 76 characters. If that 76th character happens to be in the middle if encoded UTF8 character then this character will be split into two lines corrupting the encoded sting. Test script: --------------- <?php echo quoted_printable_encode('ąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąą'); Expected result: ---------------- =C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85= =C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85= =C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85= =C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85= =C4=85=C4=85=C4=85=C4=85=C4=85 Actual result: -------------- =C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4= =85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85= =C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4= =85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85=C4=85= =C4=85=C4=85=C4=85 (compare ends of each line) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62462&edit=1