How do I implement input validation in my application?
Input validation ensures that the data entered by users is correct and secure. You can implement it by checking data types, formats, and ranges before processing.
What are some common methods for input validation?
Common methods include using regular expressions, built-in validation functions, and creating custom validation logic for specific requirements.
Can you give me an example of using regular expressions for validation?
Sure! For validating an email address, you can use a regex like this: ^[\w-\.]+@[\w-]+\.[a-z]{2,4}$
. It checks for the general structure of an email.
What about client-side vs server-side validation?
Client-side validation provides immediate feedback to users, while server-side validation is crucial for security. It's best to use both.
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