Global Validation

Input validation prevents SQL injection and XSS by enforcing type checking, format validation, and sanitization at both client and server boundaries. Apply allowlists, escape special characters, and validate all data before processing or storing it to block malicious payloads.

Implement validation consistently by enforcing type, format, and range checks on both client and server sides. Sanitize all inputs, validate required fields, and return specific error messages for each field to guide users and prevent invalid data from reaching your database.

Sanitize input whenever data enters your system—forms, API endpoints, and background jobs all require sanitization to prevent injection attacks. Data integrity and security depend on validating and cleaning every input source, not just user-facing interfaces.

Yes, but server-side validation is mandatory for security; client-side validation improves user experience. Always validate on both layers independently because client-side checks can be bypassed. Use consistent rules and clear error messages across both boundaries.

Validate email format with format checks, enforce minimum and maximum length on text fields, verify data types match requirements, and check that required fields are present. Combine format validation with sanitization to block malicious content while accepting legitimate input.