支付宝 手机网站支付，支付成功后，isSign=false
支付宝 手机网站支付，支付成功后，在跳转同步通知页面时，即demo样例的call_back_url.php文件。执行以下语句时
//计算得出通知验证结果
$alipayNotify = new AlipayNotify($alipay_config);
$verify_result = $alipayNotify->verifyReturn();
然后会执行AlipayNotify类的verifyReturn方法里的getSignVeryfy，生成签名结果。里面有个注释说明：
【isSign的结果不是true，与安全校验码、请求时的参数格式（如：带自定义参数等）、编码格式有关】，但是我都是照搬样本并只改关键的参数值，为什么还是
返回false，导致验证不成功。请问是怎么回事？钱都支付扣取，怎么老是验证失败 ？
回复讨论(解决方案)
你的return url get参数中是否包含其他除了支付宝回调过来参数的内容?
getsign那个函数发出来看看
支付成功后 会提示支付完成页面，该页面有个【完成】的按钮。 a链接 如下：
http://www.xxx.com/wappay/call_back_url.php?out_trade_no=903627&request_token=requestToken&result=success&trade_no=2015111800001000850071807569&sign=A4IF5nRVQzcS0%2FGoDIpjYKOZvzWVQG6BwydgrtkVnX25QWz%2BPnlma7O9tb4QhvcNpoBmOnoU%2BAQuLJtlluJb9FH4sONIM5vvBDYAGrC6HsDJdCytFymWxu6x0dDNefgm%2BWvEzc%2Bi1%2FVA%2Bl%2BLPnVfTbmn8%2FP40nByyGevTgwbsXQ%3D&sign_type=0001
点击之后就同步跳转，但是同步跳转后该页面验证不通过，情况和开始说的问题一样
而且我发现demo根本没有去触发到异步通知处理的操作。不知道是不是同步跳转是第一步，验证通过后才调用异步处理？
getsign函数：我的 是 触发 case "0001"，通过日志打印时，得出为 false 结果
那就是你改坏了。 不行就用异步验证。
日志如下：
demo的样例真的没问题吗？我调试好几天都是这样子。跪求大神解惑
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