WSF/PHP调用带有WS-Security支持的Web Service时的注意事项
1、WSF/PHP【WSO2 Web Services Framework for PHP】 是WSO2.ORG提供的专门针对PHP调用Web Service的一个优秀框架，使用非常简单；但是WSO2不仅仅提供针对PHP的ws框架，而且还对其他很多中语言提供开发框架，比如基于Spring、Perl、Ruby……，除此之外还提供很多其他框架和培训服务，具体可查询wso2.org和wso2.com；
2、WSF/PHP模块的安装需要很多其他的支持包，在windows下面体现为一些dll文件，主要包括Libxml2、iconv、Openssl、zlib，而不仅仅是Libxml2【GNOME XML Library】；安装过程中需要将这些依赖dll全部都集中到wsf_c/lib/目录中；这些依赖包可以到http://www.zlatkovic.com/pub/libxml/下载，下载完成之后对各压缩包解压，dll文件一般位于/bin/目录中；
3、WSF所依赖的这些dll文件一定需要copy到/windows/system32/中才行，否则加载模块不成功；这点和官方文档中说的直接将wsf_c/lib/加入到path中即可是不一致的；当然这点可能有其他方式可以解决，因为我不精通PHP，但是和一些同事沟通过，但没结果；
4、验证是否正常加载了WSF模块，只用php -m命令查看列表是不够的，即时WSF模块没有加载成功，但是php.ini中设置了WSF模块，那php -m的列表中也会包括WSF；最保险的做法是查看服务器日志比如Apache；
5、在申明WSSecurityToken实例的时候，参数receiverCertificate是用来加密Soap消息的，而不是用来验证服务端返回的签名信息的，所以若只是需要签名，那该参数无需设置；WSF/PHP目前还没有提供验证服务端返回的签名信息功能的；
6、WSF/PHP调用WS时默认使用SOAP 1.2协议，这可能会对某些服务端ws调用时出错，若需要设置使用SOAP版本，则可以在申请WSClient实例时设置参数"useSOAP" => "1.1"实现；
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