coupon code but checking different way:)
Hello my friends.. Sorry for my english
I want to use a coupon code system on my website, I looked all codes, but I want differently.
we have a text form, (<input type="text" )
when somebody enters the coupon code, the script will check it automatically if it is true or not..If it is true, right on the text form it will write "cuopon code is true", if not "coupon code is invalid"
I dont want to use mysql database..It has to be simple way..right coupon code may be store even in .dat file or notepad..
how can I do this ?