How to get the values of Manipulate control variables programmatically into some variables for further use I am placing an e-commerce system with Laravel and Iyzico, but I am getting an invalid signature error, I don't know how to solve this, I have tried all kinds of methods, but the https://case.edu/cgi-bin/newsline.pl?URL=https://kuikpos.com.tr/blog/link-ile-odeme-nedir