Global Validation

Server-side validation using allowlists and sanitization prevents SQL injection and XSS attacks. Implement allowlist-based validation rules in your API endpoints and form request classes to accept only expected data formats and values, then sanitize inputs to strip malicious content before processing.

Enforce consistent validation at every entry point—form request classes, API endpoints, controllers, and services—against the same business rules and type constraints. This prevents data corruption and security vulnerabilities by ensuring no malicious or malformed data reaches your database or business logic.

Validate file uploads server-side by checking file format, size limits, and content against allowlists before storage. Sanitize filenames and reject files that don't match expected types to prevent directory traversal, command injection, and denial-of-service attacks.

Yes. Implement type checks and format validation rules in your form request classes to enforce password strength policies and validate email format. Server-side validation ensures these rules are always applied, preventing weak credentials and invalid data from entering your system.

Client-side validation improves user experience with immediate feedback, but server-side validation is mandatory for security—it prevents attackers from bypassing client checks. Always implement allowlist-based, type-checked validation server-side to guarantee data integrity and block malicious input.

Return specific, descriptive error messages that explain which field failed and why—for example, 'email must be a valid format' or 'password must contain at least 12 characters.' Clear errors help users correct input while preventing information disclosure that attackers could exploit.