hi ,
i have a form for register user . data save in mysql database:
1 - name
2 - last name
3 - tel
4 - . . . .
. .
8 - IP
9 - time ( timestamp )

now for security ! each IP only one register in system each 60 min . for two place send error : you are register in system with this IP ! for register again please wait 60min ( or any time ) . how to ?? thanks regards .