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

<?php
$host = "www.example.com";
$path = "/path/to/script.php";
$data = "data1=value1&data2=value2";
$data = urlencode($data);

header("POST $path HTTP/1.1\\r\
" );
header("Host: $host\\r\
" );
header("Content-type: application/x-www-form-urlencoded\\r\
" );
header("Content-length: " . strlen($data) . "\\r\
" );
header("Connection: close\\r\
\\r\
" );
header($data);
?>

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