Javascript: Form Data Validation and Sanitization

This PHP snippet focuses on validating and sanitizing user inputs from forms to prevent common security threats like XSS and SQL injection. It uses PHP's filter functions to validate email addresses and sanitize strings.

The example demonstrates how to structure form submissions for validation and sanitization before using the data in a database query or displaying it back to the user.

Error handling includes providing user feedback when inputs do not meet the required criteria, ensuring a good user experience while maintaining security.

The snippet is structured to be easy to integrate into existing forms and can be expanded to include more complex validation rules based on the application's requirements.

It is essential for any PHP developer to ensure data integrity and security in web applications, making this snippet a valuable resource.