Description:
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imap_utf8() incorrectly converts when used in conjunction with setlocale().

I'm working on a Webmail application, which uses gettext for localization and depends on IMAP extension.

The output is always UTF-8, so I don't need to mess with charset conversions too much.

I'm using imap_utf8() to convert the subject/sender/CC information correctly, directly to UTF8. It works well, unless I'm setting current locale with say, en_US.UTF-8. Then it converts to some 8bit charset even if it's supposed to output UTF-8.

Would be easy to reproduce, but you'd need some weird subject line, like this one:



Reproduce code:
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setlocale(LC_ALL, "en_US.UTF-8");
echo imap_utf8("(IH#: 5176) Re: =?ISO-8859-9?Q?=FCr=FCn=FC_h=FDzl=FD_sat=FDn?==?ISO-8859-9?Q?_al_dedi=F0im_zaman_?=");


Expected result:
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setlocale(LC_ALL, "POSIX");
echo imap_utf8("(IH#: 5176) Re: =?ISO-8859-9?Q?=FCr=FCn=FC_h=FDzl=FD_sat=FDn?==?ISO-8859-9?Q?_al_dedi=F0im_zaman_?=");