--- /dev/null
+--TEST--
+Bug #7561 Mail_mimePart::quotedPrintableEncode() misbehavior with mbstring overload
+--INI--
+mbstring.language=Neutral
+mbstring.func_overload=6
+mbstring.internal_encoding=UTF-8
+mbstring.http_output=UTF-8
+--SKIPIF--
+<?php
+include "PEAR.php";
+if (!extension_loaded('mbstring')){
+ if (!PEAR::loadExtension('mbstring')){
+ print('SKIP could not load mbstring module');
+ }
+}
+--FILE--
+<?php
+include("Mail/mimePart.php");
+// string is UTF-8 encoded
+$input = "Micha\xC3\xABl \xC3\x89ric St\xC3\xA9phane";
+$rv = Mail_mimePart::quotedPrintableEncode($input, 76, "\n");
+echo $rv, "\n";
+--EXPECT--
+Micha=C3=ABl =C3=89ric St=C3=A9phane