[PHP] Failed in setlocale()

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setlocale(LC_ALL, "zh_CN");
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But failed and return FALSE.

Try to list the locales contained in the locale archive file.
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# localedef --list-archive
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If "zh_CN" is not in the list, try to add it.
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# localedef -f GBK -i zh_CN zh_CN
===============

Ref:
http://bbs.php.cn/php/ref.gettext.html#43165
http://docs.php.net/manual/en/function.setlocale.php
# man localedef