'你好', 'b' => 'bb');//header('content-type:application/json; charset=utf-8');echo json_encode($a).\n;function decodeunicode($str){ return preg_replace_callback('/\\\\u([0-9a-f]{4})/i', create_function( '$matches', 'return mb_convert_encoding(pack(h*, $matches[1]), utf-8, ucs-2be);' ), $str);}echo decodeunicode(json_encode($a)).\n;?>
参考资料：http://stackoverflow.com/questions/2934563/how-to-decode-unicode-escape-sequences-like-u00ed-to-proper-utf-8-encoded-char
http://php.net/manual/en/function.preg-replace-callback.php