What is the the meaning and purpose of this unusual value in URL parameter?

I am looking at my server logs and I see malicious requests like this: http://www.*****.in/catalogue.php?storeid=%27nvOpzp;%20AND%201=1%20OR%20(%3C%27%22%3EiKO)) What is the user trying to do, and and how can I protect against such things? >Solution : If we urldecode the parameter value, it becomes a bit more readable and it’s clear that it’s a SQL injection attempt –… Read More What is the the meaning and purpose of this unusual value in URL parameter?