What is server-side validation and why is it important?

What is server-side validation and why is it important?

Server-side validation is the process of validating user input on the server rather than on the client side. It's important because it ensures that data is checked for accuracy and security before being processed or stored.

How does it differ from client-side validation?

Client-side validation occurs in the user's browser, providing immediate feedback, while server-side validation happens on the server, ensuring data integrity and security regardless of the client's environment.

Can you give me an example of server-side validation?

Sure! For instance, when a user submits a registration form, the server checks if the email format is correct and if the email is already in use before creating a new account.

What are the common techniques used for server-side validation?

Common techniques include using regular expressions for format validation, checking against a database for uniqueness, and implementing business logic rules to ensure data meets specific criteria.