How do I solve an issue that’s related to inserting entries into mysql using php?

Technically if you refresh the page with the same POST data, as far as I know, you will have the same referrer, so you shouldn't try to check whether the referrer is product. Php .

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.