哪个大神可以指导下，我现在公钥私钥都有了，有一个netpayclient.php，还有一个chinapay.php貌似是测试是否可以使用的，这个代码是这样的 setMerKeyFile("/app/netpay/MerPrK80808012280042720061228133545.key");

setPubKeyFile("/app/netpay/PgPubk.key");

$result = signOrder("808080122800427","2222222221111111","000000002000","156","20070305","0001");
echo "result = $result\n";

$result = verifyTransResponse("808080122800427","2222222221111111","000000002000","156","20070305","0001","1001","aaaaaaaaaaaaaaaaaaaaaaaaaaa");
echo "result = $result\n";

$result = signData("808080122800427","2222222221111111");
echo "result = $result\n";

$result = verifySignData("2222222221111111","000000002000");
echo "result = $result\n";

问题是：
setMerKeyFile("/app/netpay/MerPrK80808012280042720061228133545.key");

setPubKeyFile("/app/netpay/PgPubk.key");

$result = signOrder("808080122800427","2222222221111111","000000002000","156","20070305","0001");这三个方法都是哪里来的？
调用这三个方法代码就不会再继续执行下去了，直接一片空白明晚想问下，有没有人会的吗，教我一下哈