签名验证在任何基于签名的表单实现中都是关键部分。
Verification of the signature is a key in any signature-based form implementation.
很多业务应用程序都有基于业务规则验证表单字段的要求。
Many business-line applications have requirements to validate form fields based on business rules. Each business rule is unique, but the following are a few examples of business validation rules.
最后，您学习了如何处理表单数据，提供基于表单输入的服务器端验证。
Finally, you learned how to handle form data, providing server-side validation based on form input.
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