问题描述：
在使用PHP和JAVA操作XML-RPC的时候，如果request中包含中文字符，会被自动编码成如下样式：
欢欢 。
环境：PHP内置XML-RPC的API，Apache的XML-RPC的JAVA API
PHP下的解决方法：
起初以为是中文字符的编码问题，所以我就尝试用各种编码方式来编码中文字符，然后交给string xmlrpc_encode_request ( string method, mixed params)函数来生成XML格式的请求，可是依然如故。百思不得其界。便操其Google 一通神搜，也没找到解决办法，后来我找到了http://xmlrpc-epi.sourceforge.net/这个网站。才知道，原来PHP文档里给的xmlrpc_encode_request ( string method, mixed params)函数少了一个可选参数！！！！正确的应该是这样的：string xmlrpc_encode_request(string method, mixed params [, array output_options])！！output_options的结构如下：
$output_options = array(
"output_type" = "xml",
"verbosity" = "pretty",
"escaping" = array("markup", "non-ascii", "non-print"),
"version" = "xmlrpc",
"encoding" = "utf-8"
);
or
$output_options = array("output_type" = "php");
原文说明如下：
output_type: return data as either php native data types or xml encoded. ifphp is used, then the other values are ignored. default = xml
verbosity: determine compactness of generated xml. options are no_white_space, newlines_only, and pretty. default = pretty
escaping: determine how/whether to escape certain characters. 1 or more values are allowed. If multiple, they need to be specified as a sub-array. options are: cdata, non-ascii, non-print, and markup.default = non-ascii, non-print, markup
version: version of xml vocabulary to use. currently, three are supported: xmlrpc, soap 1.1, and simple. The keyword auto is also recognized to mean respond in whichever version the request came in. default = auto (when applicable), xmlrpc
encoding: the encoding that the data is in. Since PHP defaults to iso-8859-1 you will usually want to use that. Change it if you know what you are doing. default=iso-8859-1
经过测试关键是在"escaping" = array("markup")这个值上，将第三个参数传入如下值就可以解决问题了：
$output_options = array(
"output_type" = "xml",
"verbosity" = "pretty",
"escaping" = array("markup"),
"version" = "xmlrpc",
"encoding" = "utf-8"
);