Hi! I have been asked to create a contact form for a contest that each person can only send it once per 24hs. What would be the right method to do this without using db? I dont have much skills in php or java, and none in db, so Im asking for your help please!
The info that I will use to know which person filled the form is an input called DNI (which is the personal identification number) so when validating the form, it sholud look for that number (i dont know were and how hehe) and compare dates (or hours) to allow or deny sending the form.
sry my english if its not right