2 Bug #31911 (mb_decode_mimeheader() is case-sensitive to hex escapes)
4 <?php extension_loaded('mbstring') or die('skip mbstring not available'); ?>
7 echo mb_decode_mimeheader("Works: =?iso-8859-1?q?=3F=3F=3F?=");
9 echo mb_decode_mimeheader("Fails: =?iso-8859-1?q?=3f=3f=3f?=")