If you are seeing this on your own website logs or search bar, it means someone (or an automated bot) is testing your site for security holes. To prevent this: If you are seeing this on your own
Never trust data coming from a user. Always filter it to remove characters like ' , -- , and ; . SQL injection UNION attacks | Web Security Academy look at the employee payroll
Instead of just saying "Gardening," you say: "Show me Gardening books AND ALSO go into the restricted office, look at the employee payroll, and tell me the name on the second paycheck." If you are seeing this on your own