Hello,
I see that the variables $_POST and $_REQUEST have some common elements such as, both contain the input variable-values of the form. However $_REQUEST has some extra elements like usename, password. I want to know, 1) does $_POST contain only the input variables of the current form? 2) from where does $_REQUEST get its elements? I see that $_REQUEST is commonly used. mastertable is drawn from $_POST while masterkeys are checked from $_REQUEST. 3) which of them should I use (when)? and finally 4) what are the differences between them?