How to set conjob for PHP file on free host

i need to run php file on root domain but host no have Cpanel. how to run php file at root every minute.
i search on internet and follow it not work.
thank.

 

i use free host it no have cpanel or direcadmin

i test opc module Auction it must use cronjob to run php file. i modify auction+multivender it ok but it not start auction. i must change auction status at database for start auction
this my modify module

you can signup for vender and test it not start auto when create auction for product. it remain at status before auction begin
thank.

 

Umm ok thank.
and you know about cronjob on win7+ampps or other visual server ?

 

Windows task scheduler is what you need.