Sanitization

/ˈin-pu̇t va-lə-ˈdā-shən/

noun — "trust nothing, verify everything."

Input Validation is the process of examining, filtering, and verifying data before it is accepted, processed, stored, or acted upon by a system. Its purpose is to ensure that incoming data conforms to expected rules, formats, ranges, and constraints, preventing errors, security vulnerabilities, and unexpected behavior.