Bug #75979 [Opn->Nab]: mb_encode_mimeheader invalid MIME quoted-printable

Edit report at https://bugs.php.net/bug.php?id=75979&edit=1 ID: 75979 Updated by: cmb@php.net Reported by: azurit at pobox dot sk Summary: mb_encode_mimeheader invalid MIME quoted-printable -Status: Open +Status: Not a bug Type: Bug Package: mbstring related Operating System: linux PHP Version: 7.2.2 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php While it is correct that a colon must be quoted inside an encoded-word, there is no need here to construct an encoded-word, and so this is not done. Compare this with mb_encode_mimeheader("tést:tést", "UTF-8", "Q") which needs to construct an encoded-word (due to the non ASCII characters), and therefore evaluates to =?UTF-8?Q?t=C3=A9st=3At=C3=A9st?= Previous Comments: ------------------------------------------------------------------------ [2018-02-18 20:12:01] azurit at pobox dot sk Description: ------------ Function mb_encode_mimeheader is NOT quoting a colon character (:), which is against RFC, see: https://tools.ietf.org/html/rfc5322#section-3.2.3 See also this very same Thunderbird bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1438590 Test script: --------------- <?php mb_internal_encoding('UTF-8'); echo mb_encode_mimeheader("test:test", "UTF-8", "Q"); ?> Expected result: ---------------- test=3atest Actual result: -------------- test:test ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75979&edit=1