i've maked a php script that use a mysql database..i've inserted set_time_limit(0); in my code and i started the proces.. after around 10 minutes i closed the browser but the script/proces still runing on my server after over a half a hour

..
in this rhytm the duration of all entire process will be around 5-10 hours.. maybe more..
i've tryed to kill the proces from phpmyadmin but the prosess is still runing ..
what can i do to stop the process whitout damage the mysql?
thx