Note for NodeJS: You need to install the following modules:
npm i axios crypto-js qs
Using the PHP client library
If you are using our PHP client library, there are setter and getter methods to access the PHP object properties.
For more information about the usage of Payrexx Gateway, please visit Payrexx Gateway section.
All the fields[...] parameters need to follow each other and therefore need to be ordered. In python you can achieve that using OrderedDict.