PHP Redirect with POST data

Question

I did some research on this topic, and there are some experts who have said that it is not possible, so I would like to ask for an alternative solution.

My situation

Answer 1

Try this:

Send data and request with http header in page B to redirect to Gateway

Additional Headers :

Accept: \*/\*
User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like 
Gecko) Chrome/74.0.3729.169 Safari/537.36