最近做支付宝手机接口郁闷死了 求大神们帮忙~！
问题1：手机端安卓自然是JAVA，而服务端是PHP，在做支付宝异步验证notify_url的时候，按照支付宝的demo来操作验证失败，用日志做调查后发现传过来的$_POST['sign']验证参数 在base64_decode时，返回的竟然是乱码，这里就疑问，难道在JAVA端用BASE64加密后 在PHP端解密不能？ 求解~！
问题2：在服务器PHP端验证要用到3个PEM文件，3个文件的格式到底是啥，我问了支付宝技术支持，一个人说，用支付宝提供的软件生成的rsa_private_key.pem和rsa_public_key.pem是否不用去掉头和尾，直接替换掉key文件夹下的2个同名文件？ 还是要去掉头和尾空格与换行 直接留一行字符串？（这部分按照文档的写了 照样不通过，才来问的~！）
问题3：最后一个pem文件 alipay_public_key看文档说是按照上传的公钥，复制下来后去换行和空格，但是当openssl验证文件 载入之后 openssl_get_publickey返回的竟然为空，这个真心纠结了，然后我又尝试用原文件rsa_public_key改成openssl_get_publickey这时候返回提示Resource id #20或者Resource id #21
网上查的要死 也没找到这2个提示 啥意思！
求各位大师指点~！~！
回复讨论(解决方案)
既不懂java也没支付宝编程经验的多嘴一句??
会不会是字节型数据的问题？
php处理这个要小心，因为php对字节和字串是混合的
如果不是这个问题就再等有相关经验的人的答案吧
问支付宝技术人员
问支付宝技术人员
支付宝技术支持的客服 都被我问了多少遍了 说的东西貌似也没什么实质性的 无非就是按文档啊，编码什么的，都试过了 还是验证失败~！
愁都愁死了~！
一步步来，先不要base64，发原字串过去，看看php收到的是什么，这样可以确定是否字节型数据
然后再encode和decode
key那个也是同样操作
支付宝的异步返回是不经过你手机端的，是支付宝服务器主动发起的请求（你异步填写的那个url）.
你可以先查看你的加密方式， 是md5 还是rsa
我也碰到这个问题了，问支付宝技术客服一点用都没有，我想问下你的问题解决了吗？纠结呀。
楼主解决了没？
支付宝返回的数据有时是xml 格式的，有时是数组格式，php 要判断返回格式，然后转换一下
表示 我也一直遇到 openssl_get_privatekey获取的为空。。不知道这是什么原因。。查遍了都没得出个结果 。楼主解决了没。有没有人知道原因，麻烦告诉我好吗？邮箱 ：252962553@qq.com。 谢谢了
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